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'use strict';
const assert = require('assert');
const { parse } = require('../lib/subprotocol');
describe('subprotocol', () => {
describe('parse', () => {
it('parses a single subprotocol', () => {
assert.deepStrictEqual(parse('foo'), new Set(['foo']));
});
it('parses multiple subprotocols', () => {
assert.deepStrictEqual(
parse('foo,bar,baz'),
new Set(['foo', 'bar', 'baz'])
);
});
it('ignores the optional white spaces', () => {
const header = 'foo , bar\t, \tbaz\t , qux\t\t,norf';
assert.deepStrictEqual(
parse(header),
new Set(['foo', 'bar', 'baz', 'qux', 'norf'])
);
});
it('throws an error if a subprotocol is empty', () => {
[
[',', 0],
['foo,,', 4],
['foo, ,', 6]
].forEach((element) => {
assert.throws(
() => parse(element[0]),
new RegExp(
`^SyntaxError: Unexpected character at index ${element[1]}$`
)
);
});
});
it('throws an error if a subprotocol is duplicated', () => {
['foo,foo,bar', 'foo,bar,foo'].forEach((header) => {
assert.throws(
() => parse(header),
/^SyntaxError: The "foo" subprotocol is duplicated$/
);
});
});
it('throws an error if a white space is misplaced', () => {
[
['f oo', 2],
[' foo', 0]
].forEach((element) => {
assert.throws(
() => parse(element[0]),
new RegExp(
`^SyntaxError: Unexpected character at index ${element[1]}$`
)
);
});
});
it('throws an error if a subprotocol contains invalid characters', () => {
[
['f@o', 1],
['f\\oo', 1],
['foo,b@r', 5]
].forEach((element) => {
assert.throws(
() => parse(element[0]),
new RegExp(
`^SyntaxError: Unexpected character at index ${element[1]}$`
)
);
});
});
it('throws an error if the header value ends prematurely', () => {
['foo ', 'foo, ', 'foo,bar ', 'foo,bar,'].forEach((header) => {
assert.throws(
() => parse(header),
/^SyntaxError: Unexpected end of input$/
);
});
});
});
});