Replace current validates with pester testing approach #5 (#1232)

* ,oving to the pester approach part #5

* moving to the pester approach part #5

* fixed PostgreSQL tests

* return Validate-Svn.ps1

* fixed Selenium test

* fixed rust test

* fix rust test

images/win/scripts/Tests/Databases.Tests.ps1

@@ -6,9 +6,55 @@ Describe "MongoDB" {
         "$ToolName --version" | Should -ReturnZeroExitCode
     }
 }
+
+Describe "PostgreSQL" {
+    $psqlTests = @(
+        @{envVar = "PGROOT"; pgPath = Get-EnvironmentVariable "PGROOT"}
+        @{envVar = "PGBIN"; pgPath = Get-EnvironmentVariable "PGBIN"}
+        @{envVar = "PGDATA"; pgPath = Get-EnvironmentVariable "PGDATA"}
+    )
+
+    Context "Environment variable" {
+        It "PGUSER contains postgres" {
+            Get-EnvironmentVariable "PGUSER" | Should -Be "postgres"
+        }
+
+        It "PGPASSWORD contains root" {
+            Get-EnvironmentVariable "PGPASSWORD" | Should -Be "root"
+        }
+
+        It "<envVar> environment variable exists" -TestCases $psqlTests {
+            Get-EnvironmentVariable $envVar | Should -Not -BeNullOrEmpty
+        }
+    }
+
+    Context "Path" {
+        It "<pgPath> path exists" -TestCases $psqlTests {
+            $pgPath | Should -Exist
+        }
+    }
+
+    Context "Service" {
+        $psqlService = Get-Service -Name postgresql*
+        $psqlServiceTests = @{
+            Name = $psqlService.Name
+            Status = $psqlService.Status
+            StartType = $psqlService.StartType
+        }
+
+        It "<Name> service is stopped" -TestCases $psqlServiceTests {
+            $Status | Should -Be "Stopped"
+        }
+
+        It "<Name> service is disabled" -TestCases $psqlServiceTests {
+            $StartType | Should -Be "Disabled"
+        }
+    }
+}
+
 Describe "MySQL" {
     It "MySQL CLI" {
         "mysql -V" | Should -ReturnZeroExitCode
-    } 
+    }
 }