Add Yarn to the e2e test

Run tests both with and without Yarn installed.
facebook · Oct 29, 2016 · e756d73 · e756d73
1 parent 1edbf2d
commit e756d73
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diff --git a/.travis.yml b/.travis.yml
@@ -9,3 +9,6 @@ cache:
   - packages/create-react-app/node_modules
   - packages/react-scripts/node_modules
 script: tasks/e2e.sh
+env:
+  - USE_YARN=no
+  - USE_YARN=yes
diff --git a/tasks/e2e.sh b/tasks/e2e.sh
@@ -53,6 +53,12 @@ set -x
 cd ..
 root_path=$PWD
 
+if [ "$USE_YARN" = "yes" ]
+then
+  # Install Yarn so that the test can use it to install packages.
+  npm install -g yarn
+fi
+
 npm install
 
 # Lint own code