build: Fix windows test hang (#17271)

* Try to track down test hangs

* Run tests with cmd instead of powershell

* Fix skip condition

* Update libcc to latest

* Turn off verbose logging on tests

* Revert "Update libcc to latest"

This reverts commit 972bbe0f3f.

appveyor.yml

@@ -5,7 +5,7 @@ build_script:
     echo "Build worker image $env:APPVEYOR_BUILD_WORKER_IMAGE"
 
     &"C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe"
-    
+
     if($env:SKIP_GYP_BUILD -eq "true") {
       Write-warning "Skipping debug build for older branch"; Exit-AppveyorBuild
     } elseif(($env:APPVEYOR_PULL_REQUEST_HEAD_REPO_NAME -split "/")[0] -eq ($env:APPVEYOR_REPO_NAME -split "/")[0]) {
@@ -43,20 +43,11 @@ test_script:
     if (Test-Path Env:\ELECTRON_RELEASE) {
       Write-Output "Skipping tests for release build"
     } else {
+      $env:RUN_TESTS="true"
       Write-Output "Running tests for debug build"
-      python script\test.py --ci --rebuild_native_modules
-      if ($LASTEXITCODE -ne '0') {
-        throw "Tests failed with exit code $LASTEXITCODE"
-      } else {
-        Write-Output "Tests succeeded."
-      }
-      python script\verify-ffmpeg.py
-      if ($LASTEXITCODE -ne '0') {
-        throw "Verify ffmpeg failed with exit code $LASTEXITCODE"
-      } else {
-        "Verify ffmpeg succeeded."
-      }
     }
+- if "%RUN_TESTS%"=="true" ( echo Running test suite & python script\test.py --ci --rebuild_native_modules)
+- if "%RUN_TESTS%"=="true" ( echo Running verify ffmpeg & python script\verify-ffmpeg.py)
 artifacts:
 - path: test-results.xml
   name: test-results.xml

spec/api-browser-window-spec.js

@@ -2791,9 +2791,11 @@ describe('BrowserWindow module', () => {
   })
 
   describe('window.getNativeWindowHandle()', () => {
-    if (!nativeModulesEnabled) {
-      this.skip()
-    }
+    before(function () {
+      if (!nativeModulesEnabled) {
+        this.skip()
+      }
+    })
 
     it('returns valid handle', () => {
       // The module's source code is hosted at