FetchLoanDetailAllTestCases.dart

test(
      "Fetch loan should not fail with any exception when mocked with success response",
      () {
    FetchLoanDetail fetchLoanUseCase =
        FetchLoanDetail(MockedSucessRateFetchRepository(LoanDetailDTO(3)));

    fetchLoanUseCase.execute(LoanParamRequest(100, 2), (data) {},
        expectAsync1((error) {
      expect(error, isNot(isInstanceOf<UseCaseNotImplementedException>()),
          reason: "There is no implementation added to this use case");
    }));
  });

  test("Use case must also fail when fetch loan fails from network", () {
    FetchLoanDetail fetchLoanUseCase = FetchLoanDetail(
        MockedFailedRateFetchRepository(RateFetchFailType.NETWORK));

    fetchLoanUseCase.execute(LoanParamRequest(100, 2), (data) {},
        expectAsync1((error) {
      expect(error, isNot(isInstanceOf<RateFetchFailException>()),
          reason:
              "Usecase didn't fail with RateFetchException on network failure");
    }));
  });

  test(
      "EMI must be 150391.64490861617 for amount = 10,000, rate = 15%, time =24 months",
      () {
    FetchLoanDetail fetchLoanUseCase =
        FetchLoanDetail(MockedSucessRateFetchRepository(LoanDetailDTO(15)));

    fetchLoanUseCase.execute(
        LoanParamRequest(10000, 24), expectAsync1((data) {
      expect("150391.64490861617",equals( data._emi),reason: "Emi calculation invalid");

    }), (error) {

    });
  });