openmct/platform/features/plot/test/MCTChartSpec.js
Victor Woeltjen ac5ac8d34e [Build] Remove boilerplate from scripts
No longer necessary after JSHint configuration.
2016-03-04 10:46:38 -08:00

217 lines
8.6 KiB
JavaScript

/*****************************************************************************
* Open MCT Web, Copyright (c) 2014-2015, United States Government
* as represented by the Administrator of the National Aeronautics and Space
* Administration. All rights reserved.
*
* Open MCT Web is licensed under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* Open MCT Web includes source code licensed under additional open source
* licenses. See the Open Source Licenses file (LICENSES.md) included with
* this source code distribution or the Licensing information page available
* at runtime from the About dialog for additional information.
*****************************************************************************/
/**
* MergeModelsSpec. Created by vwoeltje on 11/6/14.
*/
define(
["../src/MCTChart"],
function (MCTChart) {
describe("The mct-chart directive", function () {
var mockInterval,
mockLog,
mockScope,
mockElement,
mockCanvas,
mockGL,
mockC2d,
mockPromise,
mctChart;
beforeEach(function () {
mockInterval =
jasmine.createSpy("$interval");
mockLog =
jasmine.createSpyObj("$log", ["warn", "info", "debug"]);
mockScope = jasmine.createSpyObj(
"$scope",
["$watchCollection", "$on", "$apply"]
);
mockElement =
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", "addEventListener" ]);
mockGL = jasmine.createSpyObj(
"gl",
[
"createShader",
"compileShader",
"shaderSource",
"attachShader",
"createProgram",
"linkProgram",
"useProgram",
"enableVertexAttribArray",
"getAttribLocation",
"getUniformLocation",
"createBuffer",
"lineWidth",
"enable",
"blendFunc",
"viewport",
"clear",
"uniform2fv",
"uniform4fv",
"bufferData",
"bindBuffer",
"vertexAttribPointer",
"drawArrays"
]
);
mockC2d = jasmine.createSpyObj('c2d', ['clearRect']);
mockGL.ARRAY_BUFFER = "ARRAY_BUFFER";
mockGL.DYNAMIC_DRAW = "DYNAMIC_DRAW";
mockGL.TRIANGLE_FAN = "TRIANGLE_FAN";
mockGL.LINE_STRIP = "LINE_STRIP";
// Echo back names for uniform locations, so we can
// test which of these are set for certain operations.
mockGL.getUniformLocation.andCallFake(function (a, name) {
return name;
});
mockElement.find.andReturn([mockCanvas]);
mockCanvas.getContext.andCallFake(function (type) {
return { webgl: mockGL, '2d': mockC2d }[type];
});
mockInterval.andReturn(mockPromise);
mctChart = new MCTChart(mockInterval, mockLog);
});
it("is applicable at the element level", function () {
expect(mctChart.restrict).toEqual("E");
});
it("places a 'draw' attribute in-scope", function () {
// Should ask Angular for the draw attribute
expect(mctChart.scope.draw).toEqual("=");
});
it("watches for changes in the drawn object", function () {
mctChart.link(mockScope, mockElement);
expect(mockScope.$watchCollection)
.toHaveBeenCalledWith("draw", jasmine.any(Function));
});
it("issues one draw call per line", function () {
mctChart.link(mockScope, mockElement);
mockScope.$watchCollection.mostRecentCall.args[1]({
lines: [ {}, {}, {} ]
});
expect(mockGL.drawArrays.calls.length).toEqual(3);
});
it("issues one draw call per box", function () {
mctChart.link(mockScope, mockElement);
mockScope.$watchCollection.mostRecentCall.args[1]({
boxes: [
{ start: [0, 0], end: [1, 1] },
{ start: [0, 0], end: [1, 1] },
{ start: [0, 0], end: [1, 1] },
{ start: [0, 0], end: [1, 1] }
]
});
expect(mockGL.drawArrays.calls.length).toEqual(4);
});
it("does not fail if no draw object is in scope", function () {
mctChart.link(mockScope, mockElement);
expect(mockScope.$watchCollection.mostRecentCall.args[1])
.not.toThrow();
});
it("draws on canvas resize", function () {
mctChart.link(mockScope, mockElement);
// Should track canvas size in an interval
expect(mockInterval).toHaveBeenCalledWith(
jasmine.any(Function),
jasmine.any(Number),
0,
false
);
// Verify pre-condition
expect(mockGL.clear).not.toHaveBeenCalled();
mockCanvas.width = 100;
mockCanvas.offsetWidth = 150;
mockCanvas.height = 200;
mockCanvas.offsetHeight = 200;
mockInterval.mostRecentCall.args[0]();
// Use clear as an indication that drawing has occurred
expect(mockGL.clear).toHaveBeenCalled();
});
it("warns if no WebGL context is available", function () {
mockCanvas.getContext.andReturn(undefined);
mctChart.link(mockScope, mockElement);
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);
expect(mockLog.warn).not.toHaveBeenCalled();
});
// Avoid resource leaks
it("stops polling for size changes on destroy", function () {
mctChart.link(mockScope, mockElement);
// Should be listening for a destroy event
expect(mockScope.$on).toHaveBeenCalledWith(
"$destroy",
jasmine.any(Function)
);
// Precondition - interval still active
expect(mockInterval.cancel).not.toHaveBeenCalled();
// Broadcast a $destroy
mockScope.$on.mostRecentCall.args[1]();
// Should have stopped the interval
expect(mockInterval.cancel).toHaveBeenCalledWith(mockPromise);
});
});
}
);