PS: Add tests for flow sources.

Author: MathiasVP

powershell/ql/test/library-tests/frameworks/microsoft_powershell/test.expected

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+$data = Read-Host -Prompt "Enter your name"  # $ type="read from stdin"
+
+
+$xmlQuery = "/Users/User"
+$path = "C:/Users/MyData.xml"
+$xmldata = Select-Xml -Path $path -XPath $xmlQuery # $ type="file stream"
+
+$hexdata = Format-Hex -Path $path -Count 48 # $ type="file stream"

powershell/ql/test/library-tests/frameworks/microsoft_powershell/test.ps1

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+import TestUtilities.InlineFlowSourceTest

powershell/ql/test/library-tests/frameworks/microsoft_powershell/test.ql

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+$registryPath = "HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows NT/CurrentVersion"
+$valueName = "ProductName"
+$productName = [Microsoft.Win32.Registry]::GetValue($registryPath, $valueName, $null) # $ type="a value from the Windows registry"
+
+
+$registryKey = [Microsoft.Win32.Registry]::LocalMachine.OpenSubKey($registryPath)
+
+# Get the value of a registry key
+$productName2 = $registryKey.GetValue($valueName) # $ type="a value from the Windows registry"
+
+
+# Get all value names in the registry key
+$valueNames = $registryKey.GetValueNames() # $ type="a value from the Windows registry"
+
+# TODO: I think this should also have a positional element on the access path
+$subKeyNames = $registryKey.GetSubKeyNames() # $ type="a value from the Windows registry"

powershell/ql/test/library-tests/frameworks/microsoft_win32/test.expected

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+import TestUtilities.InlineFlowSourceTest

powershell/ql/test/library-tests/frameworks/microsoft_win32/test.ps1

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+$char = [System.Console]::Read() # $ type="read from stdin"
+$keyInfo = [System.Console]::ReadKey($true) # $ type="read from stdin"
+$userName = [System.Console]::ReadLine() # $ type="read from stdin"
+# $input = [System.Console]::ReadToEnd() # TODO we need to model this one
+
+$path = "%USERPROFILE%\Documents"
+$expandedPath = [System.Environment]::ExpandEnvironmentVariables($path) # $ type="environment variable"
+
+$args = [System.Environment]::GetCommandLineArgs() # $ type="command line argument"
+$variableValue = [System.Environment]::GetEnvironmentVariable("PATH") # $ type="environment variable"
+$envVariables = [System.Environment]::GetEnvironmentVariables() # $ type="environment variable"

powershell/ql/test/library-tests/frameworks/microsoft_win32/test.ql

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+import TestUtilities.InlineFlowSourceTest