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// requestPresent.js
//
// This file provides helpers for testing VRDisplay requestPresent.
function attachVRDisplay(test) {
assert_equals(
typeof navigator.getVRDisplays,
"function",
"'navigator.getVRDisplays()' must be defined."
);
return VRSimulationDriver.AttachWebVRDisplay();
}
function setupVRDisplay(test) {
assert_equals(
typeof navigator.getVRDisplays,
"function",
"'navigator.getVRDisplays()' must be defined."
);
return VRSimulationDriver.AttachWebVRDisplay()
.then(() => {
return navigator.getVRDisplays();
})
.then(displays => {
assert_equals(
displays.length,
1,
"displays.length must be one after attach."
);
vrDisplay = displays[0];
return validateNewVRDisplay(test, vrDisplay);
});
}
// Validate the settings off a freshly created VRDisplay (prior to calling
// requestPresent).
function validateNewVRDisplay(test, display) {
assert_true(
display.capabilities.canPresent,
"display.capabilities.canPresent must always be true for HMDs."
);
assert_equals(
display.capabilities.maxLayers,
1,
"display.capabilities.maxLayers must always be 1 when display.capabilities.canPresent is true for current spec revision."
);
assert_false(
display.isPresenting,
"display.isPresenting must be false before calling requestPresent."
);
assert_equals(
display.getLayers().length,
0,
"display.getLayers() should have no layers if not presenting."
);
var promise = display.exitPresent();
return promise_rejects(test, null, promise);
}
// Validate the settings off a VRDisplay after requestPresent promise is
// rejected or after exitPresent is fulfilled.
function validateDisplayNotPresenting(test, display) {
assert_false(
display.isPresenting,
"display.isPresenting must be false if requestPresent is rejected or after exitPresent is fulfilled."
);
assert_equals(
display.getLayers().length,
0,
"display.getLayers() should have no layers if requestPresent is rejected or after exitPresent is fulfilled."
);
var promise = display.exitPresent();
return promise_rejects(test, null, promise);
}