Run jest's tests in the e2e tests (#12202)

Co-authored-by: Huáng Jùnliàng <jlhwung@gmail.com>

.circleci/config.yml

@@ -153,6 +153,14 @@ jobs:
           at: /tmp/verdaccio-workspace
       - run: ./scripts/integration-tests/e2e-vue-cli.sh
 
+  e2e-jest:
+    executor: node-executor
+    steps:
+      - checkout
+      - attach_workspace:
+          at: /tmp/verdaccio-workspace
+      - run: ./scripts/integration-tests/e2e-jest.sh
+
 workflows:
   version: 2
   build-standalone:
@@ -203,3 +211,6 @@ workflows:
       - e2e-vue-cli:
           requires:
             - publish-verdaccio
+      - e2e-jest:
+          requires:
+            - publish-verdaccio

scripts/integration-tests/e2e-jest.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+#==============================================================================#
+#                                  SETUP                                       #
+#==============================================================================#
+
+# Start in scripts/integration-tests/ even if run from root directory
+cd "$(dirname "$0")" || exit
+root="$PWD"
+
+source utils/local-registry.sh
+source utils/cleanup.sh
+
+# Echo every command being executed
+set -x
+
+# Clone jest
+git clone --depth=1 https://github.com/facebook/jest /tmp/jest
+cd /tmp/jest || exit
+
+# Update @babel/* dependencies
+bump_deps="$root/utils/bump-babel-dependencies.js"
+node "$bump_deps"
+for d in ./packages/*/
+do
+  (cd "$d"; node "$bump_deps")
+done
+
+#==============================================================================#
+#                                 ENVIRONMENT                                  #
+#==============================================================================#
+node -v
+yarn --version
+python --version
+
+#==============================================================================#
+#                                   TEST                                       #
+#==============================================================================#
+
+startLocalRegistry "$root"/verdaccio-config.yml
+yarn install
+yarn dedupe '@babel/*'
+yarn build
+
+# The full test suite takes about 20mins on CircleCI. We run only a few of them
+# to speed it up.
+# The goals of this e2e test are:
+#   1) Check that the typescript compilation isn't completely broken
+#   2) Make sure that we don't accidentally break jest's usage of the Babel API
+CI=true yarn test-ci-partial packages
+CI=true yarn test-ci-partial e2e/__tests__/babel
+CI=true yarn test-ci-partial e2e/__tests__/transform
+
+cleanup

scripts/integration-tests/utils/bump-babel-dependencies.js

@@ -5,23 +5,23 @@ const packageJSONPath = path.resolve(cwd, "./package.json");
 const content = JSON.parse(fs.readFileSync(packageJSONPath));
 
 let bumped = false;
-function bumpBabelDependency(dependencies) {
+function bumpBabelDependency(dependencies, version) {
   for (const dep of Object.keys(dependencies)) {
     if (dep.startsWith("@babel/") && !dependencies[dep].includes(":")) {
-      dependencies[dep] = "latest";
+      dependencies[dep] = version;
       bumped = true;
     }
   }
 }
 
 if ("peerDependencies" in content) {
-  bumpBabelDependency(content.peerDependencies);
+  bumpBabelDependency(content.peerDependencies, "*");
 }
 if ("devDependencies" in content) {
-  bumpBabelDependency(content.devDependencies);
+  bumpBabelDependency(content.devDependencies, "latest");
 }
 if ("dependencies" in content) {
-  bumpBabelDependency(content.dependencies);
+  bumpBabelDependency(content.dependencies, "latest");
 }
 
 if (bumped) {

scripts/integration-tests/utils/local-registry.sh

@@ -19,6 +19,7 @@ function startLocalRegistry {
   export YARN_NPM_PUBLISH_REGISTRY="$custom_registry_url"
   export YARN_NPM_REGISTRY_SERVER="$custom_registry_url"
   export YARN_NPM_AUTH_IDENT="username:password"
+  export YARN_UNSAFE_HTTP_WHITELIST="localhost"
 }
 
 function loginLocalRegistry {