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/*
Distributed under both the W3C Test Suite License [1] and the W3C
3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
policies and contribution forms [3].
*/
/* For user documentation see docs/idlharness.md */
/**
* Notes for people who want to edit this file (not just use it as a library):
*
* Most of the interesting stuff happens in the derived classes of IdlObject,
* especially IdlInterface. The entry point for all IdlObjects is .test(),
* which is called by IdlArray.test(). An IdlObject is conceptually just
* "thing we want to run tests on", and an IdlArray is an array of IdlObjects
* with some additional data thrown in.
*
* The object model is based on what WebIDLParser.js produces, which is in turn
* based on its pegjs grammar. If you want to figure out what properties an
* object will have from WebIDLParser.js, the best way is to look at the
* grammar:
*
*
* So for instance:
*
* // interface definition
* interface
* = extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w
* { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; }
*
* This means that an "interface" object will have a .type property equal to
* the string "interface", a .name property equal to the identifier that the
* parser found, an .inheritance property equal to either null or the result of
* the "ifInheritance" production found elsewhere in the grammar, and so on.
* After each grammatical production is a JavaScript function in curly braces
* that gets called with suitable arguments and returns some JavaScript value.
*
* (Note that the version of WebIDLParser.js we use might sometimes be
* out-of-date or forked.)
*
* The members and methods of the classes defined by this file are all at least
* briefly documented, hopefully.
*/
(function(){
"use strict";
/// Helpers ///
function constValue (cnt) {
if (cnt.type === "null") return null;
if (cnt.type === "NaN") return NaN;
if (cnt.type === "Infinity") return cnt.negative ? -Infinity : Infinity;
return cnt.value;
}
function minOverloadLength(overloads) {
if (!overloads.length) {
return 0;
}
return overloads.map(function(attr) {
return attr.arguments ? attr.arguments.filter(function(arg) {
return !arg.optional && !arg.variadic;
}).length : 0;
})
.reduce(function(m, n) { return Math.min(m, n); });
}
/// IdlArray ///
// Entry point
self.IdlArray = function()
//@{
{
/**
* A map from strings to the corresponding named IdlObject, such as
* IdlInterface or IdlException. These are the things that test() will run
* tests on.
*/
this.members = {};
/**
* A map from strings to arrays of strings. The keys are interface or
* exception names, and are expected to also exist as keys in this.members
* (otherwise they'll be ignored). This is populated by add_objects() --
* see documentation at the start of the file. The actual tests will be
* run by calling this.members[name].test_object(obj) for each obj in
* this.objects[name]. obj is a string that will be eval'd to produce a
* JavaScript value, which is supposed to be an object implementing the
* given IdlObject (interface, exception, etc.).
*/
this.objects = {};
/**
* When adding multiple collections of IDLs one at a time, an earlier one
* might contain a partial interface or implements statement that depends
* on a later one. Save these up and handle them right before we run
* tests.
*
* .partials is simply an array of objects from WebIDLParser.js'
* "partialinterface" production. .implements maps strings to arrays of
* strings, such that
*
* A implements B;
* A implements C;
* D implements E;
*
* results in { A: ["B", "C"], D: ["E"] }.
*/
this.partials = [];
this["implements"] = {};
};
//@}
IdlArray.prototype.add_idls = function(raw_idls)
//@{
{
/** Entry point. See documentation at beginning of file. */
this.internal_add_idls(WebIDL2.parse(raw_idls));
};
//@}
IdlArray.prototype.add_untested_idls = function(raw_idls)
//@{
{
/** Entry point. See documentation at beginning of file. */
var parsed_idls = WebIDL2.parse(raw_idls);
for (var i = 0; i < parsed_idls.length; i++)
{
parsed_idls[i].untested = true;
if ("members" in parsed_idls[i])
{
for (var j = 0; j < parsed_idls[i].members.length; j++)
{
parsed_idls[i].members[j].untested = true;
}
}
}
this.internal_add_idls(parsed_idls);
};
//@}
IdlArray.prototype.internal_add_idls = function(parsed_idls)
//@{
{
/**
* Internal helper called by add_idls() and add_untested_idls().
* parsed_idls is an array of objects that come from WebIDLParser.js's
* "definitions" production. The add_untested_idls() entry point
* additionally sets an .untested property on each object (and its
* .members) so that they'll be skipped by test() -- they'll only be
* used for base interfaces of tested interfaces, return types, etc.
*/
parsed_idls.forEach(parsed_idl => {
if (parsed_idl.type == "interface" && parsed_idl.partial)
{
this.partials.push(parsed_idl);
return;
}
if (parsed_idl.type == "implements")
{
if (!(parsed_idl.target in this["implements"]))
{
this["implements"][parsed_idl.target] = [];
}
this["implements"][parsed_idl.target].push(parsed_idl["implements"]);
return;
}
parsed_idl.array = this;
if (parsed_idl.name in this.members)
{
throw "Duplicate identifier " + parsed_idl.name;
}
switch(parsed_idl.type)
{
case "interface":
this.members[parsed_idl.name] =
new IdlInterface(parsed_idl, /* is_callback = */ false);
break;
case "dictionary":
// Nothing to test, but we need the dictionary info around for type
// checks
this.members[parsed_idl.name] = new IdlDictionary(parsed_idl);
break;
case "typedef":
this.members[parsed_idl.name] = new IdlTypedef(parsed_idl);
break;
case "callback":
// TODO
console.log("callback not yet supported");
break;
case "enum":
this.members[parsed_idl.name] = new IdlEnum(parsed_idl);
break;
case "callback interface":
this.members[parsed_idl.name] =
new IdlInterface(parsed_idl, /* is_callback = */ true);
break;
default:
throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported";
}
});
};
//@}
IdlArray.prototype.add_objects = function(dict)
//@{
{
/** Entry point. See documentation at beginning of file. */
for (var k in dict)
{
if (k in this.objects)
{
this.objects[k] = this.objects[k].concat(dict[k]);
}
else
{
this.objects[k] = dict[k];
}
}
};
//@}
IdlArray.prototype.prevent_multiple_testing = function(name)
//@{
{
/** Entry point. See documentation at beginning of file. */
this.members[name].prevent_multiple_testing = true;
};
//@}
IdlArray.prototype.recursively_get_implements = function(interface_name)
//@{
{
/**
* Helper function for test(). Returns an array of things that implement
* interface_name, so if the IDL contains
*
* A implements B;
* B implements C;
* B implements D;
*
* then recursively_get_implements("A") should return ["B", "C", "D"].
*/
var ret = this["implements"][interface_name];
if (ret === undefined)
{
return [];
}
for (var i = 0; i < this["implements"][interface_name].length; i++)
{
ret = ret.concat(this.recursively_get_implements(ret[i]));
if (ret.indexOf(ret[i]) != ret.lastIndexOf(ret[i]))
{
throw "Circular implements statements involving " + ret[i];
}
}
return ret;
};
//@}
IdlArray.prototype.test = function()
//@{
{
/** Entry point. See documentation at beginning of file. */
// First merge in all the partial interfaces and implements statements we
// encountered.
this.partials.forEach(parsed_idl => {
if (!(parsed_idl.name in this.members)
|| !(this.members[parsed_idl.name] instanceof IdlInterface))
{
throw "Partial interface " + parsed_idl.name + " with no original interface";
}
if (parsed_idl.extAttrs)
{
parsed_idl.extAttrs.forEach(extAttr => {
this.members[parsed_idl.name].extAttrs.push(extAttr);
});
}
parsed_idl.members.forEach(member => {
this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member));
});
});
this.partials = [];
for (var lhs in this["implements"])
{
this.recursively_get_implements(lhs).forEach(rhs => {
var errStr = lhs + " implements " + rhs + ", but ";
if (!(lhs in this.members)) throw errStr + lhs + " is undefined.";
if (!(this.members[lhs] instanceof IdlInterface)) throw errStr + lhs + " is not an interface.";
if (!(rhs in this.members)) throw errStr + rhs + " is undefined.";
if (!(this.members[rhs] instanceof IdlInterface)) throw errStr + rhs + " is not an interface.";
this.members[rhs].members.forEach(member => {
this.members[lhs].members.push(new IdlInterfaceMember(member));
});
});
}
this["implements"] = {};
// Now run test() on every member, and test_object() for every object.
for (var name in this.members)
{
this.members[name].test();
if (name in this.objects)
{
this.objects[name].forEach(str => {
this.members[name].test_object(str);
});
}
}
};
//@}
IdlArray.prototype.assert_type_is = function(value, type)
//@{
{
/**
* Helper function that tests that value is an instance of type according
* to the rules of WebIDL. value is any JavaScript value, and type is an
* object produced by WebIDLParser.js' "type" production. That production
* is fairly elaborate due to the complexity of WebIDL's types, so it's
* best to look at the grammar to figure out what properties it might have.
*/
if (type.idlType == "any")
{
// No assertions to make
return;
}
if (type.nullable && value === null)
{
// This is fine
return;
}
if (type.array)
{
// TODO: not supported yet
return;
}
if (type.sequence)
{
assert_true(Array.isArray(value), "is not array");
if (!value.length)
{
// Nothing we can do.
return;
}
this.assert_type_is(value[0], type.idlType.idlType);
return;
}
type = type.idlType;
switch(type)
{
case "void":
assert_equals(value, undefined);
return;
case "boolean":
assert_equals(typeof value, "boolean");
return;
case "byte":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-128 <= value && value <= 127, "byte " + value + " not in range [-128, 127]");
return;
case "octet":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 255, "octet " + value + " not in range [0, 255]");
return;
case "short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-32768 <= value && value <= 32767, "short " + value + " not in range [-32768, 32767]");
return;
case "unsigned short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 65535, "unsigned short " + value + " not in range [0, 65535]");
return;
case "long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " not in range [-2147483648, 2147483647]");
return;
case "unsigned long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " not in range [0, 4294967295]");
return;
case "long long":
assert_equals(typeof value, "number");
return;
case "unsigned long long":
case "EpochTimeStamp":
case "DOMTimeStamp":
assert_equals(typeof value, "number");
assert_true(0 <= value, "unsigned long long is negative");
return;
case "float":
case "double":
case "DOMHighResTimeStamp":
case "unrestricted float":
case "unrestricted double":
// TODO: distinguish these cases
assert_equals(typeof value, "number");
return;
case "DOMString":
case "ByteString":
case "USVString":
assert_equals(typeof value, "string");
return;
case "object":
assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
return;
}
if (!(type in this.members))
{
throw "Unrecognized type " + type;
}
if (this.members[type] instanceof IdlInterface)
{
// We don't want to run the full
// IdlInterface.prototype.test_instance_of, because that could result
// in an infinite loop. TODO: This means we don't have tests for
// NoInterfaceObject interfaces, and we also can't test objects that
// come from another self.
assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
if (value instanceof Object
&& !this.members[type].has_extended_attribute("NoInterfaceObject")
&& type in self)
{
assert_true(value instanceof self[type], "not instanceof " + type);
}
}
else if (this.members[type] instanceof IdlEnum)
{
assert_equals(typeof value, "string");
}
else if (this.members[type] instanceof IdlDictionary)
{
// TODO: Test when we actually have something to test this on
}
else if (this.members[type] instanceof IdlTypedef)
{
// TODO: Test when we actually have something to test this on
}
else
{
throw "Type " + type + " isn't an interface or dictionary";
}
};
//@}
/// IdlObject ///
function IdlObject() {}
IdlObject.prototype.test = function()
//@{
{
/**
* By default, this does nothing, so no actual tests are run for IdlObjects
* that don't define any (e.g., IdlDictionary at the time of this writing).
*/
};
//@}
IdlObject.prototype.has_extended_attribute = function(name)
//@{
{
/**
* This is only meaningful for things that support extended attributes,
* such as interfaces, exceptions, and members.
*/
return this.extAttrs.some(function(o)
{
return o.name == name;
});
};
//@}
/// IdlDictionary ///
// Used for IdlArray.prototype.assert_type_is
function IdlDictionary(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "dictionary"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** An array of objects produced by the "dictionaryMember" production. */
this.members = obj.members;
/**
* The name (as a string) of the dictionary type we inherit from, or null
* if there is none.
*/
this.base = obj.inheritance;
}
//@}
IdlDictionary.prototype = Object.create(IdlObject.prototype);
/// IdlInterface ///
function IdlInterface(obj, is_callback) {
/**
* obj is an object produced by the WebIDLParser.js "exception" or
* "interface" production, as appropriate.
*/
/** Self-explanatory. */
this.name = obj.name;
/** A back-reference to our IdlArray. */
this.array = obj.array;
/**
* An indicator of whether we should run tests on the (exception) interface
* object and (exception) interface prototype object. Tests on members are
* controlled by .untested on each member, not this.
*/
this.untested = obj.untested;
/** An array of objects produced by the "ExtAttr" production. */
this.extAttrs = obj.extAttrs;
/** An array of IdlInterfaceMembers. */
this.members = obj.members.map(function(m){return new IdlInterfaceMember(m); });
if (this.has_extended_attribute("Unforgeable")) {
this.members
.filter(function(m) { return !m["static"] && (m.type == "attribute" || m.type == "operation"); })
.forEach(function(m) { return m.isUnforgeable = true; });
}
/**
* The name (as a string) of the type we inherit from, or null if there is
* none.
*/
this.base = obj.inheritance;
this._is_callback = is_callback;
}
IdlInterface.prototype = Object.create(IdlObject.prototype);
IdlInterface.prototype.is_callback = function()
//@{
{
return this._is_callback;
};
//@}
IdlInterface.prototype.has_constants = function()
//@{
{
return this.members.some(function(member) {
return member.type === "const";
});
};
//@}
IdlInterface.prototype.is_global = function()
//@{
{
return this.extAttrs.some(function(attribute) {
return attribute.name === "Global" ||
attribute.name === "PrimaryGlobal";
});
};
//@}
IdlInterface.prototype.test = function()
//@{
{
if (this.has_extended_attribute("NoInterfaceObject"))
{
// No tests to do without an instance. TODO: We should still be able
// to run tests on the prototype object, if we obtain one through some
// other means.
return;
}
if (!this.untested)
{
// First test things to do with the exception/interface object and
// exception/interface prototype object.
this.test_self();
}
// Then test things to do with its members (constants, fields, attributes,
// operations, . . .). These are run even if .untested is true, because
// members might themselves be marked as .untested. This might happen to
// interfaces if the interface itself is untested but a partial interface
// that extends it is tested -- then the interface itself and its initial
// members will be marked as untested, but the members added by the partial
// interface are still tested.
this.test_members();
};
//@}
IdlInterface.prototype.test_self = function()
//@{
{
test(() => {
// This function tests WebIDL as of 2015-01-13.
// TODO: Consider [Exposed].
// "For every interface that is exposed in a given ECMAScript global
// environment and:
// * is a callback interface that has constants declared on it, or
// * is a non-callback interface that is not declared with the
// [NoInterfaceObject] extended attribute,
// a corresponding property MUST exist on the ECMAScript global object.
// The name of the property is the identifier of the interface, and its
// value is an object called the interface object.
// The property has the attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true }."
if (this.is_callback() && !this.has_constants()) {
return;
}
// TODO: Should we test here that the property is actually writable
// etc., or trust getOwnPropertyDescriptor?
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
var desc = Object.getOwnPropertyDescriptor(self, this.name);
assert_false("get" in desc, "self's property " + format_value(this.name) + " has getter");
assert_false("set" in desc, "self's property " + format_value(this.name) + " has setter");
assert_true(desc.writable, "self's property " + format_value(this.name) + " is not writable");
assert_false(desc.enumerable, "self's property " + format_value(this.name) + " is enumerable");
assert_true(desc.configurable, "self's property " + format_value(this.name) + " is not configurable");
if (this.is_callback()) {
// "The internal [[Prototype]] property of an interface object for
// a callback interface MUST be the Object.prototype object."
assert_equals(Object.getPrototypeOf(self[this.name]), Object.prototype,
"prototype of self's property " + format_value(this.name) + " is not Object.prototype");
return;
}
// "The interface object for a given non-callback interface is a
// function object."
// "If an object is defined to be a function object, then it has
// characteristics as follows:"
// Its [[Prototype]] internal property is otherwise specified (see
// below).
// "* Its [[Get]] internal property is set as described in ECMA-262
// section 9.1.8."
// Not much to test for this.
// "* Its [[Construct]] internal property is set as described in
// ECMA-262 section 19.2.2.3."
// Tested below if no constructor is defined. TODO: test constructors
// if defined.
// "* Its @@hasInstance property is set as described in ECMA-262
// section 19.2.3.8, unless otherwise specified."
// TODO
// ES6 (rev 30) 19.1.3.6:
// "Else, if O has a [[Call]] internal method, then let builtinTag be
// "Function"."
assert_class_string(self[this.name], "Function", "class string of " + this.name);
// "The [[Prototype]] internal property of an interface object for a
// non-callback interface is determined as follows:"
var prototype = Object.getPrototypeOf(self[this.name]);
if (this.base) {
// "* If the interface inherits from some other interface, the
// value of [[Prototype]] is the interface object for that other
// interface."
var has_interface_object =
!this.array
.members[this.base]
.has_extended_attribute("NoInterfaceObject");
if (has_interface_object) {
assert_own_property(self, this.base,
'should inherit from ' + this.base +
', but self has no such property');
assert_equals(prototype, self[this.base],
'prototype of ' + this.name + ' is not ' +
this.base);
}
} else {
// "If the interface doesn't inherit from any other interface, the
// value of [[Prototype]] is %FunctionPrototype% ([ECMA-262],
// section 6.1.7.4)."
assert_equals(prototype, Function.prototype,
"prototype of self's property " + format_value(this.name) + " is not Function.prototype");
}
if (!this.has_extended_attribute("Constructor")) {
// "The internal [[Call]] method of the interface object behaves as
// follows . . .
//
// "If I was not declared with a [Constructor] extended attribute,
// then throw a TypeError."
assert_throws(new TypeError(), () => {
self[this.name]();
}, "interface object didn't throw TypeError when called as a function");
assert_throws(new TypeError(), () => {
new self[this.name]();
}, "interface object didn't throw TypeError when called as a constructor");
}
}, this.name + " interface: existence and properties of interface object");
if (!this.is_callback()) {
test(() => {
// This function tests WebIDL as of 2014-10-25.
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
// "Interface objects for non-callback interfaces MUST have a
// property named “length” with attributes { [[Writable]]: false,
// [[Enumerable]]: false, [[Configurable]]: true } whose value is
// a Number."
assert_own_property(self[this.name], "length");
var desc = Object.getOwnPropertyDescriptor(self[this.name], "length");
assert_false("get" in desc, this.name + ".length has getter");
assert_false("set" in desc, this.name + ".length has setter");
assert_false(desc.writable, this.name + ".length is writable");
assert_false(desc.enumerable, this.name + ".length is enumerable");
assert_true(desc.configurable, this.name + ".length is not configurable");
var constructors = this.extAttrs
.filter(function(attr) { return attr.name == "Constructor"; });
var expected_length = minOverloadLength(constructors);
assert_equals(self[this.name].length, expected_length, "wrong value for " + this.name + ".length");
}, this.name + " interface object length");
}
// TODO: Test named constructors if I find any interfaces that have them.
test(() => {
// This function tests WebIDL as of 2015-01-21.
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
if (this.is_callback()) {
assert_false("prototype" in self[this.name],
this.name + ' should not have a "prototype" property');
return;
}
// "An interface object for a non-callback interface must have a
// property named “prototype” with attributes { [[Writable]]: false,
// [[Enumerable]]: false, [[Configurable]]: false } whose value is an
// object called the interface prototype object. This object has
// properties that correspond to the regular attributes and regular
// operations defined on the interface, and is described in more detail
// in section 4.5.4 below."
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
var desc = Object.getOwnPropertyDescriptor(self[this.name], "prototype");
assert_false("get" in desc, this.name + ".prototype has getter");
assert_false("set" in desc, this.name + ".prototype has setter");
assert_false(desc.writable, this.name + ".prototype is writable");
assert_false(desc.enumerable, this.name + ".prototype is enumerable");
assert_false(desc.configurable, this.name + ".prototype is configurable");
// Next, test that the [[Prototype]] of the interface prototype object
// is correct. (This is made somewhat difficult by the existence of
// [NoInterfaceObject].)
// TODO: Aryeh thinks there's at least other place in this file where
// we try to figure out if an interface prototype object is
// correct. Consolidate that code.
// "The interface prototype object for a given interface A must have an
// internal [[Prototype]] property whose value is returned from the
// following steps:
// "If A is declared with the [Global] or [PrimaryGlobal] extended
// attribute, and A supports named properties, then return the named
// properties object for A, as defined in section 4.5.5 below.
// "Otherwise, if A is declared to inherit from another interface, then
// return the interface prototype object for the inherited interface.
// "Otherwise, if A is declared with the [ArrayClass] extended
// attribute, then return %ArrayPrototype% ([ECMA-262], section
// 6.1.7.4).
// "Otherwise, return %ObjectPrototype% ([ECMA-262], section 6.1.7.4).
// ([ECMA-262], section 15.2.4).
if (this.name === "Window") {
assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
'WindowProperties',
'Class name for prototype of Window' +
'.prototype is not "WindowProperties"');
} else {
var inherit_interface, inherit_interface_has_interface_object;
if (this.base) {
inherit_interface = this.base;
inherit_interface_has_interface_object =
!this.array
.members[inherit_interface]
.has_extended_attribute("NoInterfaceObject");
} else if (this.has_extended_attribute('ArrayClass')) {
inherit_interface = 'Array';
inherit_interface_has_interface_object = true;
} else {
inherit_interface = 'Object';
inherit_interface_has_interface_object = true;
}
if (inherit_interface_has_interface_object) {
assert_own_property(self, inherit_interface,
'should inherit from ' + inherit_interface + ', but self has no such property');
assert_own_property(self[inherit_interface], 'prototype',
'should inherit from ' + inherit_interface + ', but that object has no "prototype" property');
assert_equals(Object.getPrototypeOf(self[this.name].prototype),
self[inherit_interface].prototype,
'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype');
} else {
// We can't test that we get the correct object, because this is the
// only way to get our hands on it. We only test that its class
// string, at least, is correct.
assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
inherit_interface + 'Prototype',
'Class name for prototype of ' + this.name +
'.prototype is not "' + inherit_interface + 'Prototype"');
}
}
// "The class string of an interface prototype object is the
// concatenation of the interface’s identifier and the string
// “Prototype”."
assert_class_string(self[this.name].prototype, this.name + "Prototype",
"class string of " + this.name + ".prototype");
// String() should end up calling {}.toString if nothing defines a
// stringifier.
if (!this.has_stringifier()) {
assert_equals(String(self[this.name].prototype), "[object " + this.name + "Prototype]",
"String(" + this.name + ".prototype)");
}
}, this.name + " interface: existence and properties of interface prototype object");
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
if (this.is_callback()) {
assert_false("prototype" in self[this.name],
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "If the [NoInterfaceObject] extended attribute was not specified on
// the interface, then the interface prototype object must also have a
// property named “constructor” with attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true } whose value is a
// reference to the interface object for the interface."
assert_own_property(self[this.name].prototype, "constructor",
this.name + '.prototype does not have own property "constructor"');
var desc = Object.getOwnPropertyDescriptor(self[this.name].prototype, "constructor");
assert_false("get" in desc, this.name + ".prototype.constructor has getter");
assert_false("set" in desc, this.name + ".prototype.constructor has setter");
assert_true(desc.writable, this.name + ".prototype.constructor is not writable");
assert_false(desc.enumerable, this.name + ".prototype.constructor is enumerable");
assert_true(desc.configurable, this.name + ".prototype.constructor in not configurable");
assert_equals(self[this.name].prototype.constructor, self[this.name],
this.name + '.prototype.constructor is not the same object as ' + this.name);
}, this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property');
};
//@}
IdlInterface.prototype.test_member_const = function(member)
//@{
{
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
// "For each constant defined on an interface A, there must be
// a corresponding property on the interface object, if it
// exists."
assert_own_property(self[this.name], member.name);
// "The value of the property is that which is obtained by
// converting the constant’s IDL value to an ECMAScript
// value."
assert_equals(self[this.name][member.name], constValue(member.value),
"property has wrong value");
// "The property has attributes { [[Writable]]: false,
// [[Enumerable]]: true, [[Configurable]]: false }."
var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}, this.name + " interface: constant " + member.name + " on interface object");
// "In addition, a property with the same characteristics must
// exist on the interface prototype object."
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
if (this.is_callback()) {
assert_false("prototype" in self[this.name],
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
assert_own_property(self[this.name].prototype, member.name);
assert_equals(self[this.name].prototype[member.name], constValue(member.value),
"property has wrong value");
var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}, this.name + " interface: constant " + member.name + " on interface prototype object");
};
//@}
IdlInterface.prototype.test_member_attribute = function(member)
//@{
{
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
if (member["static"]) {
assert_own_property(self[this.name], member.name,
"The interface object must have a property " +
format_value(member.name));
} else if (this.is_global()) {
assert_own_property(self, member.name,
"The global object must have a property " +
format_value(member.name));
assert_false(member.name in self[this.name].prototype,
"The prototype object must not have a property " +
format_value(member.name));
// Try/catch around the get here, since it can legitimately throw.
// If it does, we obviously can't check for equality with direct
// invocation of the getter.
var gotValue;
var propVal;
try {
propVal = self[member.name];
gotValue = true;
} catch (e) {
gotValue = false;
}
if (gotValue) {
var getter = Object.getOwnPropertyDescriptor(self, member.name).get;
assert_equals(typeof(getter), "function",
format_value(member.name) + " must have a getter");
assert_equals(propVal, getter.call(undefined),
"Gets on a global should not require an explicit this");
}
this.do_interface_attribute_asserts(self, member);
} else {
assert_true(member.name in self[this.name].prototype,
"The prototype object must have a property " +
format_value(member.name));
if (!member.has_extended_attribute("LenientThis")) {
assert_throws(new TypeError(), () => {
self[this.name].prototype[member.name];
}, "getting property on prototype object must throw TypeError");
} else {
assert_equals(self[this.name].prototype[member.name], undefined,
"getting property on prototype object must return undefined");
}
this.do_interface_attribute_asserts(self[this.name].prototype, member);
}
}, this.name + " interface: attribute " + member.name);
};
//@}
IdlInterface.prototype.test_member_operation = function(member)
//@{
{
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
if (this.is_callback()) {
assert_false("prototype" in self[this.name],
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "For each unique identifier of an operation defined on the
// interface, there must be a corresponding property on the
// interface prototype object (if it is a regular operation) or
// the interface object (if it is a static operation), unless
// the effective overload set for that identifier and operation
// and with an argument count of 0 (for the ECMAScript language
// binding) has no entries."
//
var memberHolderObject;
if (member["static"]) {
assert_own_property(self[this.name], member.name,
"interface object missing static operation");
memberHolderObject = self[this.name];
} else if (this.is_global()) {
assert_own_property(self, member.name,
"global object missing non-static operation");
memberHolderObject = self;
} else {
assert_own_property(self[this.name].prototype, member.name,
"interface prototype object missing non-static operation");
memberHolderObject = self[this.name].prototype;
}
this.do_member_operation_asserts(memberHolderObject, member);
}, this.name + " interface: operation " + member.name +
"(" + member.arguments.map(function(m) { return m.idlType.idlType; }) +
")");
};
//@}
IdlInterface.prototype.do_member_operation_asserts = function(memberHolderObject, member)
//@{
{
var operationUnforgeable = member.isUnforgeable;
var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name);
// "The property has attributes { [[Writable]]: B,
// [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
// operation is unforgeable on the interface, and true otherwise".
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_equals(desc.writable, !operationUnforgeable,
"property should be writable if and only if not unforgeable");
assert_true(desc.enumerable, "property is not enumerable");
assert_equals(desc.configurable, !operationUnforgeable,
"property should be configurable if and only if not unforgeable");
// "The value of the property is a Function object whose
// behavior is as follows . . ."
assert_equals(typeof memberHolderObject[member.name], "function",
"property must be a function");
// "The value of the Function object’s “length” property is
// a Number determined as follows:
// ". . .
// "Return the length of the shortest argument list of the
// entries in S."
assert_equals(memberHolderObject[member.name].length,
minOverloadLength(this.members.filter(function(m) {
return m.type == "operation" && m.name == member.name;
})),
"property has wrong .length");
// Make some suitable arguments
var args = member.arguments.map(function(arg) {
return create_suitable_object(arg.idlType);
});
// "Let O be a value determined as follows:
// ". . .
// "Otherwise, throw a TypeError."
// This should be hit if the operation is not static, there is
// no [ImplicitThis] attribute, and the this value is null.
//
// TODO: We currently ignore the [ImplicitThis] case. Except we manually
// check for globals, since otherwise we'll invoke window.close(). And we
// have to skip this test for anything that on the proto chain of "self",
// since that does in fact have implicit-this behavior.
if (!member["static"]) {
if (!this.is_global() &&
memberHolderObject[member.name] != self[member.name])
{
assert_throws(new TypeError(), function() {
memberHolderObject[member.name].apply(null, args);
}, "calling operation with this = null didn't throw TypeError");
}
// ". . . If O is not null and is also not a platform object
// that implements interface I, throw a TypeError."
//
// TODO: Test a platform object that implements some other
// interface. (Have to be sure to get inheritance right.)
assert_throws(new TypeError(), function() {
memberHolderObject[member.name].apply({}, args);
}, "calling operation with this = {} didn't throw TypeError");
}
}
//@}
IdlInterface.prototype.test_member_stringifier = function(member)
//@{
{
test(() => {
if (this.is_callback() && !this.has_constants()) {
return;
}
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
if (this.is_callback()) {
assert_false("prototype" in self[this.name],
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// ". . . the property exists on the interface prototype object."
var interfacePrototypeObject = self[this.name].prototype;
assert_own_property(self[this.name].prototype, "toString",
"interface prototype object missing non-static operation");
var stringifierUnforgeable = member.isUnforgeable;
var desc = Object.getOwnPropertyDescriptor(interfacePrototypeObject, "toString");
// "The property has attributes { [[Writable]]: B,
// [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
// stringifier is unforgeable on the interface, and true otherwise."
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_equals(desc.writable, !stringifierUnforgeable,
"property should be writable if and only if not unforgeable");
assert_true(desc.enumerable, "property is not enumerable");
assert_equals(desc.configurable, !stringifierUnforgeable,
"property should be configurable if and only if not unforgeable");
// "The value of the property is a Function object, which behaves as
// follows . . ."
assert_equals(typeof interfacePrototypeObject.toString, "function",
"property must be a function");
// "The value of the Function object’s “length” property is the Number
// value 0."
assert_equals(interfacePrototypeObject.toString.length, 0,
"property has wrong .length");
// "Let O be the result of calling ToObject on the this value."
assert_throws(new TypeError(), function() {
self[this.name].prototype.toString.apply(null, []);
}, "calling stringifier with this = null didn't throw TypeError");
// "If O is not an object that implements the interface on which the
// stringifier was declared, then throw a TypeError."
//
// TODO: Test a platform object that implements some other
// interface. (Have to be sure to get inheritance right.)
assert_throws(new TypeError(), function() {
self[this.name].prototype.toString.apply({}, []);
}, "calling stringifier with this = {} didn't throw TypeError");
}, this.name + " interface: stringifier");
};
//@}
IdlInterface.prototype.test_members = function()
//@{
{
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.untested) {
continue;
}
switch (member.type) {
case "const":
this.test_member_const(member);
break;
case "attribute":
// For unforgeable attributes, we do the checks in
// test_interface_of instead.
if (!member.isUnforgeable)
{
this.test_member_attribute(member);
}
break;
case "operation":
// TODO: Need to correctly handle multiple operations with the same
// identifier.
// For unforgeable operations, we do the checks in
// test_interface_of instead.
if (member.name) {
if (!member.isUnforgeable)
{
this.test_member_operation(member);
}
} else if (member.stringifier) {
this.test_member_stringifier(member);
}
break;
default:
// TODO: check more member types.
break;
}
}
};
//@}
IdlInterface.prototype.test_object = function(desc)
//@{
{
var obj, exception = null;
try
{
obj = eval(desc);
}
catch(e)
{
exception = e;
}
// TODO: WebIDLParser doesn't currently support named legacycallers, so I'm
// not sure what those would look like in the AST
var expected_typeof = this.members.some(function(member)
{
return member.legacycaller
|| ("idlType" in member && member.idlType.legacycaller)
|| ("idlType" in member && typeof member.idlType == "object"
&& "idlType" in member.idlType && member.idlType.idlType == "legacycaller");
}) ? "function" : "object";
this.test_primary_interface_of(desc, obj, exception, expected_typeof);
var current_interface = this;
while (current_interface)
{
if (!(current_interface.name in this.array.members))
{
throw "Interface " + current_interface.name + " not found (inherited by " + this.name + ")";
}
if (current_interface.prevent_multiple_testing && current_interface.already_tested)
{
return;
}
current_interface.test_interface_of(desc, obj, exception, expected_typeof);
current_interface = this.array.members[current_interface.base];
}
};
//@}
IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof)
//@{
{
// We can't easily test that its prototype is correct if there's no
// interface object, or the object is from a different global environment
// (not instanceof Object). TODO: test in this case that its prototype at
// least looks correct, even if we can't test that it's actually correct.
if (!this.has_extended_attribute("NoInterfaceObject")
&& (typeof obj != expected_typeof || obj instanceof Object))
{
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_own_property(self, this.name,
"self does not have own property " + format_value(this.name));
assert_own_property(self[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "The value of the internal [[Prototype]] property of the
// platform object is the interface prototype object of the primary
// interface from the platform object’s associated global
// environment."
assert_equals(Object.getPrototypeOf(obj),
self[this.name].prototype,
desc + "'s prototype is not " + this.name + ".prototype");
}, this.name + " must be primary interface of " + desc);
}
// "The class string of a platform object that implements one or more
// interfaces must be the identifier of the primary interface of the
// platform object."
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_class_string(obj, this.name, "class string of " + desc);
if (!this.has_stringifier())
{
assert_equals(String(obj), "[object " + this.name + "]", "String(" + desc + ")");
}
}, "Stringification of " + desc);
};
//@}
IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof)
//@{
{
// TODO: Indexed and named properties, more checks on interface members
this.already_tested = true;
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.type == "attribute" && member.isUnforgeable)
{
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
this.do_interface_attribute_asserts(obj, member);
}, this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
}
else if (member.type == "operation" &&
member.name &&
member.isUnforgeable)
{
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_own_property(obj, member.name,
"Doesn't have the unforgeable operation property");
this.do_member_operation_asserts(obj, member);
}, this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
}
else if ((member.type == "const"
|| member.type == "attribute"
|| member.type == "operation")
&& member.name)
{
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
if (!member["static"]) {
if (!this.is_global()) {
assert_inherits(obj, member.name);
} else {
assert_own_property(obj, member.name);
}
if (member.type == "const")
{
assert_equals(obj[member.name], constValue(member.value));
}
if (member.type == "attribute")
{
// Attributes are accessor properties, so they might
// legitimately throw an exception rather than returning
// anything.
var property, thrown = false;
try
{
property = obj[member.name];
}
catch (e)
{
thrown = true;
}
if (!thrown)
{
this.array.assert_type_is(property, member.idlType);
}
}
if (member.type == "operation")
{
assert_equals(typeof obj[member.name], "function");
}
}
}, this.name + " interface: " + desc + ' must inherit property "' + member.name + '" with the proper type (' + i + ')');
}
// TODO: This is wrong if there are multiple operations with the same
// identifier.
// TODO: Test passing arguments of the wrong type.
if (member.type == "operation" && member.name && member.arguments.length)
{
test(() => {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
if (!member["static"]) {
if (!this.is_global() && !member.isUnforgeable) {
assert_inherits(obj, member.name);
} else {
assert_own_property(obj, member.name);
}
}
else
{
assert_false(member.name in obj);
}
var minLength = minOverloadLength(this.members.filter(function(m) {
return m.type == "operation" && m.name == member.name;
}));
var args = [];
for (var i = 0; i < minLength; i++) {
assert_throws(new TypeError(), () => {
obj[member.name].apply(obj, args);
}, "Called with " + i + " arguments");
args.push(create_suitable_object(member.arguments[i].idlType));
}
}, this.name + " interface: calling " + member.name +
"(" + member.arguments.map(function(m) { return m.idlType.idlType; }) +
") on " + desc + " with too few arguments must throw TypeError");
}
}
};
//@}
IdlInterface.prototype.has_stringifier = function()
//@{
{
if (this.members.some(function(member) { return member.stringifier; })) {
return true;
}
if (this.base &&
this.array.members[this.base].has_stringifier()) {
return true;
}
return false;
};
//@}
IdlInterface.prototype.do_interface_attribute_asserts = function(obj, member)
//@{
{
// This function tests WebIDL as of 2015-01-27.
// TODO: Consider [Exposed].
// This is called by test_member_attribute() with the prototype as obj if
// it is not a global, and the global otherwise, and by test_interface_of()
// with the object as obj.
// "For each exposed attribute of the interface, whether it was declared on
// the interface itself or one of its consequential interfaces, there MUST
// exist a corresponding property. The characteristics of this property are
// as follows:"
// "The name of the property is the identifier of the attribute."
assert_own_property(obj, member.name);
// "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]:
// true, [[Configurable]]: configurable }, where:
// "configurable is false if the attribute was declared with the
// [Unforgeable] extended attribute and true otherwise;
// "G is the attribute getter, defined below; and
// "S is the attribute setter, also defined below."
var desc = Object.getOwnPropertyDescriptor(obj, member.name);
assert_false("value" in desc, 'property descriptor has value but is supposed to be accessor');
assert_false("writable" in desc, 'property descriptor has "writable" field but is supposed to be accessor');
assert_true(desc.enumerable, "property is not enumerable");
if (member.isUnforgeable)
{
assert_false(desc.configurable, "[Unforgeable] property must not be configurable");
}
else
{
assert_true(desc.configurable, "property must be configurable");
}
// "The attribute getter is a Function object whose behavior when invoked
// is as follows:"
assert_equals(typeof desc.get, "function", "getter must be Function");
// "If the attribute is a regular attribute, then:"
if (!member["static"]) {
// "If O is not a platform object that implements I, then:
// "If the attribute was specified with the [LenientThis] extended
// attribute, then return undefined.
// "Otherwise, throw a TypeError."
if (!member.has_extended_attribute("LenientThis")) {
assert_throws(new TypeError(), () => {
desc.get.call({});
}, "calling getter on wrong object type must throw TypeError");
} else {
assert_equals(desc.get.call({}), undefined,
"calling getter on wrong object type must return undefined");
}
}
// "The value of the Function object’s “length” property is the Number
// value 0."
assert_equals(desc.get.length, 0, "getter length must be 0");
// TODO: Test calling setter on the interface prototype (should throw
// TypeError in most cases).
if (member.readonly
&& !member.has_extended_attribute("PutForwards")
&& !member.has_extended_attribute("Replaceable"))
{
// "The attribute setter is undefined if the attribute is declared
// readonly and has neither a [PutForwards] nor a [Replaceable]
// extended attribute declared on it."
assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes");
}
else
{
// "Otherwise, it is a Function object whose behavior when
// invoked is as follows:"
assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes");
// "If the attribute is a regular attribute, then:"
if (!member["static"]) {
// "If /validThis/ is false and the attribute was not specified
// with the [LenientThis] extended attribute, then throw a
// TypeError."
// "If the attribute is declared with a [Replaceable] extended
// attribute, then: ..."
// "If validThis is false, then return."
if (!member.has_extended_attribute("LenientThis")) {
assert_throws(new TypeError(), () => {
desc.set.call({});
}, "calling setter on wrong object type must throw TypeError");
} else {
assert_equals(desc.set.call({}), undefined,
"calling setter on wrong object type must return undefined");
}
}
// "The value of the Function object’s “length” property is the Number
// value 1."
assert_equals(desc.set.length, 1, "setter length must be 1");
}
}
//@}
/// IdlInterfaceMember ///
function IdlInterfaceMember(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "ifMember" production.
* We just forward all properties to this object without modification,
* except for special extAttrs handling.
*/
for (var k in obj)
{
this[k] = obj[k];
}
if (!("extAttrs" in this))
{
this.extAttrs = [];
}
this.isUnforgeable = this.has_extended_attribute("Unforgeable");
}
//@}
IdlInterfaceMember.prototype = Object.create(IdlObject.prototype);
/// Internal helper functions ///
function create_suitable_object(type)
//@{
{
/**
* type is an object produced by the WebIDLParser.js "type" production. We
* return a JavaScript value that matches the type, if we can figure out
* how.
*/
if (type.nullable)
{
return null;
}
switch (type.idlType)
{
case "any":
case "boolean":
return true;
case "byte": case "octet": case "short": case "unsigned short":
case "long": case "unsigned long": case "long long":
case "unsigned long long": case "float": case "double":
case "unrestricted float": case "unrestricted double":
return 7;
case "DOMString":
case "ByteString":
case "USVString":
return "foo";
case "object":
return {a: "b"};
case "Node":
return document.createTextNode("abc");
}
return null;
}
//@}
/// IdlEnum ///
// Used for IdlArray.prototype.assert_type_is
function IdlEnum(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "dictionary"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** An array of values produced by the "enum" production. */
this.values = obj.values;
}
//@}
IdlEnum.prototype = Object.create(IdlObject.prototype);
/// IdlTypedef ///
// Used for IdlArray.prototype.assert_type_is
function IdlTypedef(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "typedef"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** An array of values produced by the "typedef" production. */
this.values = obj.values;
}
//@}
IdlTypedef.prototype = Object.create(IdlObject.prototype);
}());
// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker: