MethodStub.spec.ts

import {ReturnValueMethodStub} from "../src/stub/ReturnValueMethodStub";
import {strictEqual} from "../src/ts-mockito";

describe("ReturnValueMethodStub", () => {
    describe("checking if given arg is applicable", () => {
        it("returns true when arg match", () => {
            // given
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(10) as any], 50);

            // when
            const result = testObj.isApplicable([10]);

            // then
            expect(result).toBeTruthy();
        });

        it("returns false when arg doesn't match", () => {
            // given
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(10) as any], 50);

            // when
            const result = testObj.isApplicable([999]);

            // then
            expect(result).toBeFalsy();
        });
    });

    describe("checking if more than one arg is applicable", () => {
        it("returns true when all matches", () => {
            // given
            const firstValue = 10;
            const secondValue = 20;
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(firstValue) as any, strictEqual(secondValue) as any], 50);

            // when
            const result = testObj.isApplicable([firstValue, secondValue]);

            // then
            expect(result).toBeTruthy();
        });

        it("returns false when first arg doesn't match", () => {
            // given
            const firstValue = 10;
            const secondValue = 20;
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(firstValue) as any, strictEqual(secondValue) as any], 50);

            // when
            const result = testObj.isApplicable([30, secondValue]);

            // then
            expect(result).toBeFalsy();
        });

        it("returns false when second arg doesn't match", () => {
            // given
            const firstValue = 10;
            const secondValue = 20;
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(firstValue) as any, strictEqual(secondValue) as any], 50);

            // when
            const result = testObj.isApplicable([firstValue, 30]);

            // then
            expect(result).toBeFalsy();
        });

        it("returns false when both args doesn't match", () => {
            // given
            const firstValue = 10;
            const secondValue = 20;
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [strictEqual(firstValue) as any, strictEqual(secondValue) as any], 50);

            // when
            const result = testObj.isApplicable([30, 40]);

            // then
            expect(result).toBeFalsy();
        });
    });

    describe("getting mocked value", () => {
        it("returns it", () => {
            // given
            const mockedValue = 50;
            const testObj: ReturnValueMethodStub = new ReturnValueMethodStub(0, [], mockedValue);

            // when
            const result = testObj.getValue();

            // then
            expect(result).toEqual(mockedValue);
        });
    });
});