Add end-to-end Pester unit test

Author: andyleejordan

test/PowerShellEditorServices.Test.E2E/DebugAdapterProtocolMessageTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation.
+// Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
 using System;
@@ -294,5 +294,31 @@ public async Task CanLaunchScriptWithCommentedLastLineAsync()
 
             Assert.Collection(GetLog(), (i) => Assert.Equal("a log statement", i));
         }
+
+        [Fact]
+        public async Task CanRunPesterTestFile()
+        {
+            string logStatement = GenerateScriptFromLoggingStatements("works");
+            string filePath = NewTestFile(@"
+                Describe 'A' {
+                    Context 'B' {
+                        It 'C' {
+                            throw 'error'
+                        }
+                        It 'D' {
+                " + logStatement + @"
+                        }
+                    }
+                }
+            ");
+
+            await PsesDebugAdapterClient.LaunchScript(filePath, Started).ConfigureAwait(false);
+
+            ConfigurationDoneResponse configDoneResponse = await PsesDebugAdapterClient.RequestConfigurationDone(new ConfigurationDoneArguments()).ConfigureAwait(false);
+            Assert.NotNull(configDoneResponse);
+            await Task.Delay(2000).ConfigureAwait(false);
+
+            Assert.Collection(GetLog(), (i) => Assert.Equal("works", i));
+        }
     }
 }