Add a test for updating a line with a leading space

tests/Unit/DSC_HostsFile.Tests.ps1

@@ -322,6 +322,39 @@ try
                 (Get-TargetResource @testParams).Ensure | Should -Be 'Present'
             }
         }
+
+        Context 'When a host entry exists and is not correct, but has a leading space' {
+            $testParams = @{
+                HostName  = 'www.contoso.com'
+                IPAddress = '192.168.0.156'
+                Verbose   = $true
+            }
+
+            Mock -CommandName Get-Content -MockWith {
+                return @(
+                    '# A mocked example of a host file - this line is a comment',
+                    '',
+                    '127.0.0.1       localhost',
+                    '127.0.0.1  www.anotherexample.com',
+                    " 127.0.0.1  $($testParams.HostName)",
+                    '127.0.0.5  anotherexample.com',
+                    ''
+                )
+            }
+
+            It 'Should return present from the get method' {
+                (Get-TargetResource @testParams).Ensure | Should -Be 'Present'
+            }
+
+            It 'Should return false from the test method' {
+                Test-TargetResource @testParams | Should -Be $false
+            }
+
+            It 'Should update the entry in the set method' {
+                Set-TargetResource @testParams
+                Assert-MockCalled -CommandName Set-Content
+            }
+        }
     } #end InModuleScope $DSCResourceName
 }
 finally