Add repo-facing tests for UseCompatibleSyntax

Author: rjmholt

Tests/Rules/UseCompatibleSyntax.Tests.ps1

@@ -78,4 +78,20 @@ Describe "PSUseCompatibleSyntax" {
             }
         }
     }
+
+    It "Finds incompatibilities in a script file" {
+        $settings = @{ Rules = @{ PSUseCompatibleSyntax = @{ Enable = $true; TargetVersions = @("3.0", "4.0", "5.1", "6.0") } } }
+
+        $diagnostics = Invoke-ScriptAnalyzer -IncludeRule PSUseCompatibleSyntax -Path "$PSScriptRoot/CompatibilityRuleAssets/IncompatibleScript.ps1" -Settings $settings
+
+        $diagnostics.Count | Should -Be 5
+    }
+
+    It "Ensures there are no incompatibilities in PSSA build files" {
+        $settings = @{ Rules = @{ PSUseCompatibleSyntax = @{ Enable = $true; TargetVersions = @("3.0", "4.0", "5.1", "6.0") } } }
+
+        $diagnostics = Invoke-ScriptAnalyzer -IncludeRule PSUseCompatibleSyntax -Path "$PSScriptRoot/../../" -Settings $settings
+
+        $diagnostics.Count | Should -Be 0
+    }
 }