Unit Test : Test if method was called

test-if-method-was-called.cs

var mockTaxDocumentForm = new Mock<TaxDocumentForm>(null, null);
			mockTaxDocumentForm = GetMockValidTaxDocumentForm();

			var calls = 0;
			var mock = new Mock<ITaxDocumentService>();
			mock.Setup(m => m.Process(mockTaxDocumentForm.Object))
			.Callback(() => calls++);

			var methodCall = mock.Object;
			var result = methodCall;

			mock.Verify(m => m.Process(mockTaxDocumentForm.Object));
			Assert.AreEqual(1, calls);