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--- swdev:dotnet:unit_testing_with_nunit [2015/08/07 10:19]
smayr [Usage]
+++ swdev:dotnet:unit_testing_with_nunit [2016/06/30 15:38] (current)
smayr [Pattern AAA]
@@ Line 63: / Line 63: @@
     * Run Test Runner, and create new Test project (File > New Project).
     * Select assembly or application containing unit tests (Project > Add Assembly). Note: These assemblies and applications must have a reference to ''NUnit.Framework.dll'' in their individual projects.
+== Pattern AAA ==
+Modern tests contain three parts:
+<code csharp>
+[TestMethod]
+public void GetCount_ItemCountIsZero_NoNewMessages()
+{
+    //Arrange
+    Mailbox mailbox = new Mailbox();
+    //Act
+    var result = mailbox.GetCount(0);
+    //Assert
+    Assert.AreEqual("No new messages.", result);
+}
+</code>
+This can be summed up as a pattern:
+  * Arrange: setup everything needed for the running the tested code. This includes any initialization of dependencies, mocks and data needed for the test to run.
+  * Act: Invoke the code under test.
+  * Assert: Specify the pass criteria for the test, which fails it if not met.
+Source: [[http://www.typemock.com/unit-test-patterns-for-net|Unit Test Patterns for .NET]]