Adds an e2e test for when using PnP

.travis.yml

@@ -9,7 +9,7 @@ cache:
   directories:
     - .npm
 before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --nightly
   - export PATH="$HOME/.yarn/bin:$PATH"
 install: true
 script:

appveyor.yml

@@ -36,7 +36,7 @@ platform:
 install:
   - ps: Install-Product node $env:nodejs_version $env:platform
   - ps: |
-      (New-Object Net.WebClient).DownloadFile("https://yarnpkg.com/latest.msi", "$env:temp\yarn.msi")
+      (New-Object Net.WebClient).DownloadFile("https://nightly.yarnpkg.com/latest.msi", "$env:temp\yarn.msi")
       cmd /c start /wait msiexec.exe /i $env:temp\yarn.msi /quiet /qn /norestart
 
 build: off

tasks/e2e-installs.sh

@@ -229,5 +229,17 @@ npx create-react-app test-app-nested-paths-t3/aa/bb/cc/dd
 cd test-app-nested-paths-t3/aa/bb/cc/dd
 yarn start --smoke-test
 
+# ******************************************************************************
+# Test when PnP is enabled
+# ******************************************************************************
+cd "$temp_app_path"
+echo $OSTYPE
+YARN_PLUGNPLAY_OVERRIDE=1 npx create-react-app test-app-pnp
+cd test-app-pnp
+! exists node_modules
+exists .pnp.js
+yarn start --smoke-test
+yarn build
+
 # Cleanup
 cleanup