Merge pull request 251 from dev/export-alias into develop

added export-alias basic tests

src/pester-tests/Export-Alias.Tests.ps1

@@ -0,0 +1,34 @@
+Describe "Export-Alias" {
+    $testAliasDirectory = $env:TEMP + "/ExportAliasTestDirectory"
+    $testAliases        = "TestAliases"
+    $fulltestpath       = $testAliasDirectory + "/" + $testAliases
+
+    BeforeEach {
+        New-Item -Path $testAliasDirectory -ItemType Directory -Force
+    }
+
+    It "Should be able to create a file in the specified location"{
+        Export-Alias $fulltestpath
+
+
+        Test-Path $fulltestpath | Should be $true
+    }
+
+    It "Should create a file with the list of aliases that match the expected list" {
+        Export-Alias $fulltestpath
+
+        Test-Path $fulltestpath | Should Be $true
+
+        $actual   = Get-Content $fulltestpath | Sort
+        $expected = $(Get-Command -CommandType Alias)
+
+        for ( $i=0; $i -lt $expected.Length; $i++)
+        {
+            # We loop through the expected list and not the other because the output writes some comments to the file.
+            $expected[$i] | Should Match $actual[$i].Name
+        }
+
+    }
+
+    Remove-Item -Path $testAliasDirectory -Recurse -Force
+}