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[Plot] Test fallback on webglcontextlost

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Add test case to verify that fallback occurs when a
WebGL context is lost, WTD-475.
This commit is contained in:
Victor Woeltjen 2015-06-19 16:14:49 -07:00
parent b6fdf4d6ab
commit 5ca954deaf
1 changed files with 18 additions and 4 deletions
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20
platform/features/plot/test/MCTChartSpec.js
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@ -36,6 +36,7 @@ define(
mockElement,
mockCanvas,
mockGL,
mockC2d,
mockPromise,
mctChart;
@ -47,13 +48,14 @@ define(
mockScope =
jasmine.createSpyObj("$scope", ["$watchCollection", "$on"]);
mockElement =
jasmine.createSpyObj("element", ["find"]);
jasmine.createSpyObj("element", ["find", "html"]);
mockInterval.cancel = jasmine.createSpy("cancelInterval");
mockPromise = jasmine.createSpyObj("promise", ["then"]);
// mct-chart uses GLChart, so it needs WebGL API
mockCanvas = jasmine.createSpyObj("canvas", [ "getContext" ]);
mockCanvas =
jasmine.createSpyObj("canvas", [ "getContext", "addEventListener" ]);
mockGL = jasmine.createSpyObj(
"gl",
[
@ -81,6 +83,7 @@ define(
"drawArrays"
]
);
mockC2d = jasmine.createSpyObj('c2d', ['clearRect']);
mockGL.ARRAY_BUFFER = "ARRAY_BUFFER";
mockGL.DYNAMIC_DRAW = "DYNAMIC_DRAW";
mockGL.TRIANGLE_FAN = "TRIANGLE_FAN";
@ -93,7 +96,9 @@ define(
});
mockElement.find.andReturn([mockCanvas]);
mockCanvas.getContext.andReturn(mockGL);
mockCanvas.getContext.andCallFake(function (type) {
return { webgl: mockGL, '2d': mockC2d }[type];
});
mockInterval.andReturn(mockPromise);
mctChart = new MCTChart(mockInterval, mockLog);
@ -169,6 +174,15 @@ define(
expect(mockLog.warn).toHaveBeenCalled();
});
it("falls back to Canvas 2d API if WebGL context is lost", function () {
mctChart.link(mockScope, mockElement);
expect(mockCanvas.addEventListener)
.toHaveBeenCalledWith("webglcontextlost", jasmine.any(Function));
expect(mockCanvas.getContext).not.toHaveBeenCalledWith('2d');
mockCanvas.addEventListener.mostRecentCall.args[1]();
expect(mockCanvas.getContext).toHaveBeenCalledWith('2d');
});
it("logs nothing in nominal situations (WebGL available)", function () {
// Complement the previous test
mctChart.link(mockScope, mockElement);