Test: Skip install for standalone test (#10273)

jest.config.js

@@ -1,13 +1,21 @@
 "use strict";
 
+const path = require("path");
 const installPrettier = require("./scripts/install-prettier");
 
+const PROJECT_ROOT = __dirname;
 const isProduction = process.env.NODE_ENV === "production";
 const ENABLE_CODE_COVERAGE = Boolean(process.env.ENABLE_CODE_COVERAGE);
-if (isProduction || process.env.INSTALL_PACKAGE) {
-  process.env.PRETTIER_DIR = installPrettier();
+const TEST_STANDALONE = Boolean(process.env.TEST_STANDALONE);
+const INSTALL_PACKAGE = Boolean(process.env.INSTALL_PACKAGE);
+
+let PRETTIER_DIR = isProduction
+  ? path.join(PROJECT_ROOT, "dist")
+  : PROJECT_ROOT;
+if (INSTALL_PACKAGE || (isProduction && !TEST_STANDALONE)) {
+  PRETTIER_DIR = installPrettier(PRETTIER_DIR);
 }
-const { TEST_STANDALONE } = process.env;
+process.env.PRETTIER_DIR = PRETTIER_DIR;
 
 const testPathIgnorePatterns = [];
 let transform;

scripts/install-prettier.js

@@ -6,12 +6,9 @@ const tempy = require("tempy");
 
 shell.config.fatal = true;
 
-const rootDir = path.join(__dirname, "..");
 const client = process.env.NPM_CLIENT || "yarn";
-const packageDir =
-  process.env.NODE_ENV === "production" ? path.join(rootDir, "dist") : rootDir;
 
-module.exports = () => {
+module.exports = (packageDir) => {
   const tmpDir = tempy.directory();
   const file = shell.exec("npm pack", { cwd: packageDir }).stdout.trim();
   shell.mv(path.join(packageDir, file), tmpDir);

tests_config/require_prettier.js

@@ -1,7 +1,5 @@
 "use strict";
 
-const prettierRootDir = process.env.PRETTIER_DIR || "../";
-
-const prettier = require(prettierRootDir);
+const prettier = require(process.env.PRETTIER_DIR);
 
 module.exports = prettier;

tests_integration/env.js

@@ -2,18 +2,16 @@
 
 const path = require("path");
 const isProduction = process.env.NODE_ENV === "production";
-const prettierRootDir = isProduction
-  ? process.env.PRETTIER_DIR
-  : path.join(__dirname, "..");
-const { bin } = require(path.join(prettierRootDir, "package.json"));
+const { PRETTIER_DIR } = process.env;
+const { bin } = require(path.join(PRETTIER_DIR, "package.json"));
 const prettierCli = path.join(
-  prettierRootDir,
+  PRETTIER_DIR,
   typeof bin === "object" ? bin.prettier : bin
 );
 
 const thirdParty = isProduction
-  ? path.join(prettierRootDir, "./third-party")
-  : path.join(prettierRootDir, "./src/common/third-party");
+  ? path.join(PRETTIER_DIR, "./third-party")
+  : path.join(PRETTIER_DIR, "./src/common/third-party");
 
 const projectRoot = path.join(__dirname, "..");