public void CheckDataCodesWhenFormatDataIsCorrect() { // Arrange var expected = new Dictionary <string, int> { { "THB", 1 }, { "USD", 2 }, { "CZK", 3 }, }; var codes = new[] { "THB", "USD", "CZK" }; // Act var actual = _exchangeHelper.AddCodes(codes); // Assert Assert.That(actual, Is.EqualTo(expected)); }