test: add prettier e2e test (#14058)

Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

scripts/integration-tests/e2e-prettier.sh

@@ -0,0 +1,45 @@
+#!/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 prettier
+git clone --depth=1 https://github.com/prettier/prettier tmp/prettier
+cd tmp/prettier || exit
+
+# Update @babel/* dependencies
+bump_deps="$root/utils/bump-babel-dependencies.js"
+node "$bump_deps"
+
+#==============================================================================#
+#                                 ENVIRONMENT                                  #
+#==============================================================================#
+node -v
+yarn --version
+
+#==============================================================================#
+#                                   TEST                                       #
+#==============================================================================#
+
+# Don't use Yarn 2
+export YARN_IGNORE_PATH=1
+
+startLocalRegistry "$root"/verdaccio-config.yml
+yarn install
+
+# Only run js,jsx,misc format tests
+# Without --runInBand CircleCI hangs.
+yarn test "tests/format/(jsx?|misc)/" --update-snapshot --runInBand
+
+cleanup