openmct/platform/features/timeline/test/capabilities/ResourceGraphSpec.js

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define(
    ['../../src/capabilities/ResourceGraph'],
    function (ResourceGraph) {

        describe("A resource graph capability", function () {

            // Placeholder; WTD-918 will implement
            it("has zero points for zero utilization changes", function () {
                var graph = new ResourceGraph([]);
                expect(graph.getPointCount()).toEqual(0);
            });

            it("creates steps based on resource utilizations", function () {
                var graph = new ResourceGraph([
                    { start: 5, end: 100, value: 42 },
                    { start: 50, end: 120, value: -22 },
                    { start: 15, end: 40, value: 30 },
                    { start: 150, end: 180, value: -10 }
                ]);

                expect(graph.getPointCount()).toEqual(16);

                // Should get two values at every time stamp, for step-like appearance
                [5, 15, 40, 50, 100, 120, 150, 180].forEach(function (v, i) {
                    expect(graph.getDomainValue(i * 2)).toEqual(v);
                    expect(graph.getDomainValue(i * 2 + 1)).toEqual(v);
                });

                // Should also repeat values at subsequent indexes, but offset differently,
                // for horizontal spans between steps
                [0, 42, 72, 42, 20, -22, 0, -10].forEach(function (v, i) {
                    expect(graph.getRangeValue(i * 2)).toEqual(v);
                    // Offset backwards; wrap around end of the series
                    expect(graph.getRangeValue((16 + i * 2 - 1) % 16)).toEqual(v);
                });
            });

            it("filters out zero-duration spikes", function () {
                var graph = new ResourceGraph([
                    { start: 5, end: 100, value: 42 },
                    { start: 100, end: 120, value: -22 },
                    { start: 100, end: 180, value: 30 },
                    { start: 130, end: 180, value: -10 }
                ]);

                // There are only 5 unique timestamps there, so there should
                // be 5 steps, for 10 total points
                expect(graph.getPointCount()).toEqual(10);
            });

        });
    }
);