Merge pull request 285 from dev/measure-object into develop

added Measure-Object tests.  There are considerable differences between

src/pester-tests/Measure-Object.Tests.ps1

@@ -0,0 +1,160 @@
+Describe "Measure-Object" {
+    $testObject = 1,3,4
+
+    It "Should be able to be called without error" {
+        { Measure-Object | Out-Null } | Should Not Throw
+    }
+
+    It "Should be able to call on piped input" {
+        { $testObject | Measure-Object } | Should Not Throw
+    }
+
+    It "Should be able to count the number of objects input to it" {
+        $($testObject | Measure-Object).Count | Should Be $testObject.Length
+    }
+
+    It "Should be able to count using the Property switch" {
+        $expected = $(Get-ChildItem).Length
+        $actual   = $(Get-ChildItem | Measure-Object -Property Length).Count
+
+        $actual | Should Be $expected
+    }
+
+    It "Should be able to get additional stats" {
+        $actual = Get-Process | Measure-Object -Property workingset64 -Minimum -Maximum -Average
+
+        $actual.Average    | Should BeGreaterThan 0
+        $actual.Characters | Should BeNullOrEmpty
+        $actual.Lines      | Should BeNullOrEmpty
+        $actual.Maximum    | Should Not BeNullOrEmpty
+        $actual.Minimum    | Should Not BeNullOrEmpty
+        $actual.Sum        | Should BeNullOrEmpty
+    }
+
+    Context "Numeric tests" {
+        It "Should be able to sum" {
+            $actual   = $testObject | Measure-Object -Sum
+            $expected = $testObject[0]
+
+            foreach ( $obj in $testObject )
+            {
+                $expected += $obj
+            }
+
+            $actual.Sum | Should Be $expected
+        }
+
+        It "Should be able to average" {
+            $actual   = $testObject | Measure-Object -Average
+            $expected = $testObject[0]
+
+            foreach ( $obj in $testObject )
+            {
+                $expected += $obj
+            }
+
+            $expected /= $testObject.length
+
+            $actual.Average | Should Be $expected
+        }
+
+        It "Should be able to return a minimum" {
+            $actual   = $testObject | Measure-Object -Minimum
+            $expected = $testObject[0]
+
+            for ($i=0; $i -lt $testObject.length; $i++)
+            {
+                if ( $testObject[$i] -lt $expected )
+                {
+
+                    $expected = $testObject[$i]
+                }
+            }
+
+            $actual.Minimum | Should Be $expected
+        }
+
+        It "Should be able to return a minimum when multiple objects are the minimum" {
+            $testMinimum = 1,1,2,4
+            $actual      = $testMinimum | Measure-Object -Minimum
+            $expected    = $testMinimum[0]
+
+            for ($i=0; $i -lt $testMinimum.length; $i++)
+            {
+                if ( $testMinimum[$i] -lt $expected )
+                {
+
+                    $expected = $testMinimum[$i]
+                }
+            }
+
+            $actual.Minimum | Should Be $expected
+        }
+
+        It "Should be able to return a maximum" {
+            $actual   = $testObject | Measure-Object -Maximum
+            $expected = $testObject
+
+            for ($i=0; $i -lt $testObject.length; $i++)
+            {
+                if ( $testObject[$i] -gt $expected )
+                {
+
+                    $expected = $testObject[$i]
+                }
+            }
+
+            $actual.Maximum | Should Be $expected
+        }
+
+        It "Should be able to return a maximum when multiple objects are the maximum" {
+            $testMaximum = 1,3,5,5
+            $actual      = $testMaximum | Measure-Object -Maximum
+            $expected    = $testMaximum 
+
+            for ($i=0; $i -lt $testMaximum.length; $i++)
+            {
+                if ( $testMaximum[$i] -gt $expected )
+                {
+
+                    $expected = $testMaximum[$i]
+                }
+            }
+
+            $actual.Maximum | Should Be $expected
+        }
+    }
+
+    Context "String tests" {
+        if ($env:TEMP -eq "/tmp")
+        {
+            $nl = "`n"
+        }
+        else {
+            $nl = "`r`n"
+        }
+
+        $testString = "HAD I the heavens’ embroidered cloths,$nl Enwrought with golden and silver light,$nl The blue and the dim and the dark cloths$nl Of night and light and the half light,$nl I would spread the cloths under your feet:$nl But I, being poor, have only my dreams;$nl I have spread my dreams under your feet;$nl Tread softly because you tread on my dreams."
+
+        It "Should be able to count the number of words in a string" {
+            $expectedLength = $testString.Replace($nl,"").Split().length
+            $actualLength   = $testString | Measure-Object -Word
+
+            $actualLength.Words | Should Be $expectedLength
+        }
+
+        It "Should be able to count the number of characters in a string" {
+            $expectedLength = $testString.length
+            $actualLength   = $testString | Measure-Object -Character
+
+            $actualLength.Characters | Should Be $expectedLength
+        }
+
+        It "Should be able to count the number of lines in a string" {
+            $expectedLength = $testString.Split($nl).length
+            $actualLength   = $testString | Measure-Object -Line
+
+            $actualLength.Lines | Should Be $expectedLength
+        }
+    }
+}