modified and added tests according to PR

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

@@ -1,50 +1,68 @@
 Describe "Write-Output" {
-    It "Should allow piped input" {
-        { "hi" | Write-Output } | Should Not Throw
+    $testString = $testString
+    Context "Input Tests" {
+        It "Should allow piped input" {
+            { $testString | Write-Output } | Should Not Throw
+        }
+
+        It "Should write output to the output stream when using piped input" {
+            $testString | Write-Output | Should Be $testString
+        }
+
+        It "Should use inputobject switch" {
+            { Write-Output -InputObject $testString } | Should Not Throw
+        }
+
+        It "Should write output to the output stream when using inputobject switch" {
+             Write-Output -InputObject $testString | Should Be $testString
+        }
+
+        It "Should be able to write to a variable" {
+            Write-Output -InputObject $testString -OutVariable var
+            $var | Should Be $testString
+        }
     }
 
-    It "Should use inputobject switch" {
-        { Write-Output -InputObject "hi" } | Should Not Throw
+    Context "Pipeline Command Tests" {
+        It "Should send object to the next command in the pipeline" {
+            Write-Output -InputObject (1+1) | Should Be 2
+        }
+
+        It "Should have the same result between inputobject switch and piped input" {
+            Write-Output -InputObject (1+1) | Should Be 2
+
+            1+1 | Write-Output | Should Be 2
+        }
     }
 
-    It "Should be able to write to a variable" {
-        Write-Output -InputObject "hi" -OutVariable var
-        $var | Should Be "hi"
+    Context "Alias Tests" {
+        It "Should have the same result between the echo alias and the cmdlet" {
+            $alias  = echo -InputObject $testString
+            $cmdlet = Write-Output -InputObject $testString
+
+            $alias | Should Be $cmdlet
+        }
+
+        It "Should have the same result between the write alias and the cmdlet" {
+            $alias  = write -InputObject $testString
+            $cmdlet = Write-Output -InputObject $testString
+
+            $alias | Should Be $cmdlet
+        }
     }
 
-    It "Should send object to the next command in the pipeline" {
-        Write-Output -InputObject (1+1) | Should Be 2
+    Context "Enumerate Objects" {
+        $enumerationObject = @(1,2,3)
+        It "Should see individual objects when not using the NoEnumerate switch" {
+            $singleCollection = $(Write-Output $enumerationObject| Measure-Object).Count
+
+            $singleCollection | Should Be $enumerationObject.length
+        }
+
+        It "Should be able to treat a collection as a single object using the NoEnumerate switch" {
+            $singleCollection = $(Write-Output $enumerationObject -NoEnumerate | Measure-Object).Count
+
+            $singleCollection | Should Be 1
+        }
     }
-    
-    It "Should have the same result between inputobject switch and piped input" {
-        Write-Output -InputObject (1+1) | Should Be 2
-
-        1+1 | Write-Output | Should Be 2
-    }
-
-    It "Should have the same result between the echo alias and the cmdlet" {
-        $alias  = echo -InputObject "hi"
-        $cmdlet = Write-Output -InputObject "hi"
-
-        $alias | Should Be $cmdlet
-    }
-
-    It "Should have the same result between the write alias and the cmdlet" {
-        $alias  = write -InputObject "hi"
-        $cmdlet = Write-Output -InputObject "hi"
-
-        $alias | Should Be $cmdlet
-    }
-    
-    It "Should see individual objects when not using the NoEnumerate switch" {
-        $singleCollection = $(Write-Output @(1,2,3)| Measure-Object).Count
-
-        $singleCollection | Should Be 3
-    }
-
-    It "Should be able to treat a collection as a single object using the NoEnumerate switch" {
-        $singleCollection = $(Write-Output @(1,2,3) -NoEnumerate | Measure-Object).Count
-
-        $singleCollection | Should Be 1
-    }
-}
+}