Databases and java pester tests (#2338)

* added mongodb postgres java tests

* fixed 1.7 and 12 Java on Ubuntu 20

* several improvments

* removed update-environment function

* add etc-environment import

* removed sourcing invoke-tests

Co-authored-by: Leonid Lapshin <originalnoe-nazvanie@yandex.ru>

images/linux/scripts/tests/Java.Tests.ps1

@@ -0,0 +1,53 @@
+Import-Module "$PSScriptRoot/../helpers/Common.Helpers.psm1" -DisableNameChecking
+
+Describe "Java" {
+
+    if (Test-IsUbuntu20) {
+        $defaultJavaVersion = "11"
+        $javaTestCases = @(
+            @{ Version = "1.8" }
+            @{ Version = "11" }
+        )
+    }
+
+    if ((Test-IsUbuntu16) -or (Test-IsUbuntu18)) {
+        $defaultJavaVersion = "8"
+        $javaTestCases = @(
+            @{ Version = "1.7" }
+            @{ Version = "1.8" }
+            @{ Version = "11" }
+            @{ Version = "12" }
+        )
+    }
+
+    It "Java <DefaultJavaVersion> is default" -TestCases @{ defaultJavaVersion = $defaultJavaVersion } {
+        $actualJavaPath = Get-EnvironmentVariable "JAVA_HOME"
+        $expectedJavaPath = Get-EnvironmentVariable "JAVA_HOME_${defaultJavaVersion}_X64"
+
+        $actualJavaPath | Should -Not -BeNullOrEmpty
+        $expectedJavaPath | Should -Not -BeNullOrEmpty
+        $actualJavaPath | Should -Be $expectedJavaPath
+    }
+
+    It "<ToolName>" -TestCases @(
+        @{ ToolName = "java" }
+        @{ ToolName = "javac" }
+        @{ ToolName = "mvn" }
+        @{ ToolName = "ant" }
+        @{ ToolName = "gradle" }
+    ) {
+        "$ToolName -version" | Should -ReturnZeroExitCode
+    }
+
+    It "Java <Version>" -TestCases $javaTestCases {
+        $versionNumber = $version.Split(".") | Select-Object -Last 1
+
+        $javaVariableValue = Get-EnvironmentVariable "JAVA_HOME_${versionNumber}_X64"
+        $javaVariableValue | Should -Not -BeNullOrEmpty
+        $javaPath = Join-Path $javaVariableValue "bin/java"
+
+        $result = Get-CommandResult "`"$javaPath`" -version"
+        $result.ExitCode | Should -Be 0
+        $result.Output | Should -Match ([regex]::Escape("openjdk version `"${Version}."))
+    }
+}