Merge branch 'dev/write-verbose' into dev/dotnet

src/pester-tests/Write-Verbose.Tests.ps1

@@ -0,0 +1,29 @@
+Describe "Write-Verbose" {
+    It "Should be able to call cmdlet without error" {
+        { Write-Verbose -Message "test" -ErrorAction SilentlyContinue } | Should Not Throw
+    }
+
+    It "Should not display verbose output by default" {
+        $VerbosePreference | Should Be SilentlyContinue
+
+        Write-Verbose -Message "test" | Should BeNullOrEmpty
+    }
+
+    It "Should be able to set verbose output to display by changing the `$VerbosePreference automatic variable" {
+        $VerbosePreference = "Continue"
+
+        Write-Verbose -Message "test" 4>&1 | Should Not BeNullOrEmpty
+
+        $VerbosePreference = "SilentlyContinue"
+    }
+
+    It "Should be able to set verbose output to display by using the verbose switch" {
+        Write-Verbose -Message "test" -Verbose 4>&1 | Should Be "test"
+    }
+
+    It "Should be able to set verbose switch using a colon and boolean" {
+        { Write-Verbose -Message "test" -Verbose:$false } | Should Not Throw
+
+        $(Write-Verbose -Message "test" -Verbose:$true) 4>&1 | Should Be "test"
+    }
+}