openmct/platform/identity/test/IdentityAggregatorSpec.js

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 * Administration. All rights reserved.
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 * Open MCT is licensed under the Apache License, Version 2.0 (the
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define(
    ["../src/IdentityAggregator"],
    function (IdentityAggregator) {

        describe("The identity aggregator", function () {
            var mockProviders,
                mockQ,
                resolves,
                testUsers,
                aggregator;

            function resolveProviderPromises() {
                ['a', 'b', 'c'].forEach(function (id, i) {
                    resolves[id](testUsers[i]);
                });
            }

            beforeEach(function () {
                testUsers = [
                    {
                        key: "user0",
                        name: "User Zero"
                    },
                    {
                        key: "user1",
                        name: "User One"
                    },
                    {
                        key: "user2",
                        name: "User Two"
                    }
                ];

                resolves = {};

                mockProviders = ['a', 'b', 'c'].map(function (id) {
                    var mockProvider = jasmine.createSpyObj(
                        'provider-' + id,
                        ['getUser']
                    );

                    mockProvider.getUser.and.returnValue(new Promise(function (r) {
                        resolves[id] = r;
                    }));

                    return mockProvider;
                });

                mockQ = jasmine.createSpyObj('$q', ['all']);
                mockQ.all.and.callFake(function (promises) {
                    return Promise.all(promises);
                });

                aggregator = new IdentityAggregator(
                    mockQ,
                    mockProviders
                );
            });

            it("delegates to the aggregated providers", function () {
                // Verify precondition
                mockProviders.forEach(function (p) {
                    expect(p.getUser).not.toHaveBeenCalled();
                });

                aggregator.getUser();

                mockProviders.forEach(function (p) {
                    expect(p.getUser).toHaveBeenCalled();
                });
            });

            it("returns the first result when it is defined", function () {
                var promise = aggregator.getUser();

                resolveProviderPromises();

                return promise.then(function (user) {
                    expect(user).toEqual(testUsers[0]);
                });
            });

            it("returns a later result when earlier results are undefined", function () {
                testUsers[0] = undefined;

                var promise = aggregator.getUser();

                resolveProviderPromises();

                return promise.then(function (user) {
                    expect(user).toEqual(testUsers[1]);
                });
            });

            it("returns undefined when no providers expose users", function () {
                testUsers = [undefined, undefined, undefined];

                var promise = aggregator.getUser();

                resolveProviderPromises();

                return promise.then(function (user) {
                    expect(user).toBe(undefined);
                });
            });

            it("returns undefined when there are no providers", function () {
                var promise = new IdentityAggregator(mockQ, []).getUser();

                return promise.then(function (user) {
                    expect(user).toBe(undefined);
                });
            });

        });
    }
);