openmct/platform/features/timeline/test/actions/TimelineTraverserSpec.js

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define([
    "../../src/actions/TimelineTraverser"
], function (TimelineTraverser) {

    describe("TimelineTraverser", function () {
        var testModels,
            mockDomainObjects,
            traverser;

        function addMockDomainObject(id) {
            var mockDomainObject = jasmine.createSpyObj(
                    'domainObject-' + id,
                    [
                        'getId',
                        'getCapability',
                        'useCapability',
                        'hasCapability',
                        'getModel'
                    ]
                ),
                mockRelationships,
                model = testModels[id];

            mockDomainObject.getId.andReturn(id);
            mockDomainObject.getModel.andReturn(model);

            mockDomainObject.hasCapability.andCallFake(function (c) {
                return c === 'composition' ? !!model.composition :
                    c === 'relationship' ? !!model.relationships :
                        false;
            });

            if (!!model.composition) {
                mockDomainObject.useCapability.andCallFake(function (c) {
                    return c === 'composition' &&
                        Promise.resolve(model.composition.map(function (id) {
                            return mockDomainObjects[id];
                        }));
                });
            }

            if (!!model.relationships) {
                mockRelationships = jasmine.createSpyObj(
                    'relationship',
                    ['getRelatedObjects']
                );
                mockRelationships.getRelatedObjects.andCallFake(function (k) {
                    var ids = model.relationships[k] || [];
                    return Promise.resolve(ids.map(function (id) {
                        return mockDomainObjects[id];
                    }));
                });
                mockDomainObject.getCapability.andCallFake(function (c) {
                    return c === 'relationship' && mockRelationships;
                });
            }

            mockDomainObjects[id] = mockDomainObject;
        }

        beforeEach(function () {
            testModels = {
                a: { composition: [ 'b', 'c' ]},
                b: { composition: [ 'c' ] },
                c: { relationships: { modes: [ 'd' ] } },
                d: {},
                unreachable: {}
            };

            mockDomainObjects = {};
            Object.keys(testModels).forEach(addMockDomainObject);

            traverser = new TimelineTraverser(mockDomainObjects.a);
        });

        describe("buildObjectList", function () {
            var objects;

            function contains(id) {
                return objects.some(function (object) {
                    return object.getId() === id;
                });
            }

            beforeEach(function () {
                traverser.buildObjectList().then(function (objectList) {
                    objects = objectList;
                });
                waitsFor(function () {
                    return objects !== undefined;
                });
            });

            it("includes the object originally passed in", function () {
                expect(contains('a')).toBe(true);
            });

            it("includes objects reachable via composition", function () {
                expect(contains('b')).toBe(true);
                expect(contains('c')).toBe(true);
            });

            it("includes objects reachable via relationships", function () {
                expect(contains('d')).toBe(true);
            });

            it("does not include unreachable objects", function () {
                expect(contains('unreachable')).toBe(false);
            });
        });

    });
});