react-native-ui-lib/typings/components/image/__tests__/index.spec.js

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import Image from "../index";
import { ThemeManager } from "../../../style";
import Assets from "../../../assets";
describe("Image", () => {
    beforeEach(() => {
        ThemeManager.setComponentTheme("Image", {});
    });
    describe("getImageSource", () => {
        it("should return source prop, if no transformer was sent", () => {
            const uut = new Image({ source: 1 });
            expect(uut.getImageSource()).toBe(1);
        });
        it("should return transformed source prop, according to sourceTransform prop", () => {
            const sourceTransformer = jest.fn(() => 2);
            const uut = new Image({ source: 1, sourceTransformer });
            expect(uut.getImageSource()).toBe(2);
        });
        it("should return transformed source prop, according to sourceTransform in ThemeManager", () => {
            ThemeManager.setTheme({
                components: {
                    Image: {
                        sourceTransformer: jest.fn(() => 3)
                    }
                }
            });
            const uut = new Image({ source: 1 });
            expect(uut.getImageSource()).toBe(3);
        });
        it("should return transformed source prop, according to sourceTransform prop and other given props", () => {
            const sourceTransformer = jest.fn(({ size, source }) => (size === "small" ? source : 3));
            let uut = new Image({ source: 1, size: "small", sourceTransformer });
            expect(uut.getImageSource()).toBe(1);
            uut = new Image({ source: 1, size: "large", sourceTransformer });
            expect(uut.getImageSource()).toBe(3);
        });
        it("should return asset according to assetName", () => {
            Assets.loadAssetsGroup("icons", {
                test: "test.png"
            });
            Assets.loadAssetsGroup("icons.general", {
                test: "test.png"
            });
            let uut = new Image({ assetGroup: "icons", assetName: "test" });
            expect(uut.getImageSource()).toBe("test.png");
            uut = new Image({ assetGroup: "icons.general", assetName: "test" });
            expect(uut.getImageSource()).toBe("test.png");
        });
        it("should handle when source sent with uri=null", () => {
            const uut = new Image({ source: { uri: null } });
            expect(uut.getImageSource()).toEqual({ uri: undefined });
        });
        it("should handle when source sent with uri is empty string", () => {
            const uut = new Image({ source: { uri: "" } });
            expect(uut.getImageSource()).toEqual({ uri: undefined });
        });
    });
});