Add build/tests PS scripts (#436)

src/scripts/Build-PowerShell.ps1

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+& "$PSScriptRoot/Invoke-Task" Build.PsModule

src/scripts/Test-PowerShell.ps1

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+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+<#
+    .SYNOPSIS
+    Runs Pester tests.
+
+    .PARAMETER Cost
+    Optional. Indicates whether to run Cost Management tests.
+
+    .PARAMETER Data
+    Optional. Indicates whether to run open data tests.
+
+    .PARAMETER Exports
+    Optional. Indicates whether to run Cost Management export tests.
+
+    .PARAMETER FOCUS
+    Optional. Indicates whether to run FOCUS tests.
+
+    .PARAMETER Hubs
+    Optional. Indicates whether to run FinOps hubs tests.
+
+    .PARAMETER Toolkit
+    Optional. Indicates whether to run FinOps toolkit tests.
+#>
+[CmdletBinding()]
+param (
+    [switch]
+    $Cost,
+
+    [switch]
+    $Data,
+
+    [switch]
+    $Exports,
+
+    [switch]
+    $FOCUS,
+
+    [switch]
+    $Hubs,
+
+    [switch]
+    $Toolkit
+)
+
+$testsToRun = @()
+if ($Cost) { $testsToRun += '*-FinOpsCost*' }
+if ($Data) { $testsToRun += '*-OpenData*', '*-FinOpsPricingUnit*', '*-FinOpsRegion*', '*-FinOpsService*' }
+if ($Exports) { $testsToRun += '*-FinOpsCostExport*' }
+if ($FOCUS) { $testsToRun += '*-FinOpsSchema*' }
+if ($Hubs) { $testsToRun += '*-FinOpsHubs*' }
+if ($Toolkit) { $testsToRun += '*-FinOpsToolkit*' }
+
+Push-Location
+Set-Location "$PSScriptRoot/../powershell/Tests/Unit"
+
+if ($testsToRun)
+{
+    $testsToRun | Select-Object -Unique | ForEach-Object { 
+        Write-Host "Running $_"
+        Invoke-Pester -Path $_ -Output Detailed
+    }
+}
+else
+{
+    Invoke-Pester -Path * -Output Detailed
+}
+
+Pop-Location