Use latest npm in e2e tests (#3735)

* Use latest npm in e2e tests

* Keep default npm version in "simple" test

* Try to fix CI by using a version that supports Yarn

Author: gaearon

tasks/e2e-installs.sh

@@ -93,10 +93,7 @@ fi
 
 if hash npm 2>/dev/null
 then
-  # npm 5 is too buggy right now
-  if [ $(npm -v | head -c 1) -eq 5 ]; then
-    npm i -g npm@^4.x
-  fi;
+  npm i -g npm@latest
   npm cache clean || npm cache verify
 fi
 
@@ -137,39 +134,39 @@ npm install "$cli_path"
 # ******************************************************************************
 
 cd "$temp_app_path"
-create_react_app --scripts-version=0.4.0 test-app-version-number
+create_react_app --scripts-version=1.0.17 test-app-version-number
 cd test-app-version-number
 
 # Check corresponding scripts version is installed.
 exists node_modules/react-scripts
-grep '"version": "0.4.0"' node_modules/react-scripts/package.json
+grep '"version": "1.0.17"' node_modules/react-scripts/package.json
 checkDependencies
 
 # ******************************************************************************
 # Test --use-npm flag
 # ******************************************************************************
 
 cd "$temp_app_path"
-create_react_app --use-npm --scripts-version=0.4.0 test-use-npm-flag
+create_react_app --use-npm --scripts-version=1.0.17 test-use-npm-flag
 cd test-use-npm-flag
 
 # Check corresponding scripts version is installed.
 exists node_modules/react-scripts
 [ ! -e "yarn.lock" ] && echo "yarn.lock correctly does not exist"
-grep '"version": "0.4.0"' node_modules/react-scripts/package.json
+grep '"version": "1.0.17"' node_modules/react-scripts/package.json
 checkDependencies
 
 # ******************************************************************************
 # Test --scripts-version with a tarball url
 # ******************************************************************************
 
 cd "$temp_app_path"
-create_react_app --scripts-version=https://registry.npmjs.org/react-scripts/-/react-scripts-0.4.0.tgz test-app-tarball-url
+create_react_app --scripts-version=https://registry.npmjs.org/react-scripts/-/react-scripts-1.0.17.tgz test-app-tarball-url
 cd test-app-tarball-url
 
 # Check corresponding scripts version is installed.
 exists node_modules/react-scripts
-grep '"version": "0.4.0"' node_modules/react-scripts/package.json
+grep '"version": "1.0.17"' node_modules/react-scripts/package.json
 checkDependencies
 
 # ******************************************************************************

tasks/e2e-kitchensink.sh

@@ -110,10 +110,7 @@ fi
 
 if hash npm 2>/dev/null
 then
-  # npm 5 is too buggy right now
-  if [ $(npm -v | head -c 1) -eq 5 ]; then
-    npm i -g npm@^4.x
-  fi;
+  npm i -g npm@latest
   npm cache clean || npm cache verify
 fi
 

tasks/e2e-simple.sh

@@ -122,10 +122,6 @@ fi
 
 if hash npm 2>/dev/null
 then
-  # npm 5 is too buggy right now
-  if [ $(npm -v | head -c 1) -eq 5 ]; then
-    npm i -g npm@^4.x
-  fi;
   npm cache clean || npm cache verify
 fi