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

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import Picker from "../index";
const countries = [
    { label: "Israel", value: "IL" },
    { label: "United States", value: "US" },
    { label: "Germany", value: "DE" },
    { label: "Italy", value: "IT" },
    { label: "Spain", value: "ES " }
];
describe("Picker", () => {
    describe("getLabel", () => {
        it("should get label of a simple item", () => {
            let uut = new Picker({ value: countries[2] });
            expect(uut.getLabel()).toEqual(countries[2].label);
            uut = new Picker({ value: countries[3] });
            expect(uut.getLabel()).toEqual(countries[3].label);
        });
        it("should get label out of an array of items", () => {
            const uut = new Picker({ value: [countries[2], countries[4]] });
            expect(uut.getLabel()).toEqual(`${countries[2].label}, ${countries[4].label}`);
        });
    });
    describe("handlePickerOnPress", () => {
        it("should get label out of an array of items", () => {
            const onPress = jest.fn(() => { });
            const uut = new Picker({ value: countries[0], onPress });
            uut.toggleExpandableModal = jest.fn(uut.toggleExpandableModal);
            uut.handlePickerOnPress();
            expect(onPress).toHaveBeenCalled();
            expect(uut.toggleExpandableModal).toHaveBeenCalled();
        });
    });
});