chore(e2e): chdir back to the previous dir at the end of a test.

tests/e2e/tests/commands/help.ts

@@ -2,10 +2,8 @@ import {silentNg} from '../../utils/process';
 
 
 export default function() {
-  const projectDir = process.cwd();
   return Promise.resolve()
     .then(() => silentNg('help'))
     .then(() => process.chdir('/'))
-    .then(() => silentNg('help'))
-    .then(() => process.chdir(projectDir));
+    .then(() => silentNg('help'));
 }

tests/e2e/tests/packages/webpack/test.ts

@@ -6,8 +6,6 @@ import {expectFileSizeToBeUnder} from '../../../utils/fs';
 
 
 export default function(argv: any, skipCleaning: () => void) {
-  const currentDir = process.cwd();
-
   if (process.platform.startsWith('win')) {
     // Disable the test on Windows.
     return Promise.resolve();
@@ -24,6 +22,5 @@ export default function(argv: any, skipCleaning: () => void) {
     .then(() => exec('node_modules/.bin/webpack', '-p'))
     .then(() => expectFileSizeToBeUnder('dist/app.main.js', 400000))
     .then(() => expectFileSizeToBeUnder('dist/0.app.main.js', 40000))
-    .then(() => process.chdir(currentDir))
     .then(() => skipCleaning());
 }

tests/e2e_runner.js

@@ -92,8 +92,10 @@ testsToRun.reduce((previous, relativeName) => {
       };
 
     let clean = true;
+    let previousDir = null;
     return Promise.resolve()
       .then(() => printHeader(currentFileName))
+      .then(() => previousDir = process.cwd())
       .then(() => fn(argv, () => clean = false))
       .then(() => console.log('  ----'))
       .then(() => {
@@ -103,6 +105,13 @@ testsToRun.reduce((previous, relativeName) => {
           return gitClean();
         }
       })
+      .then(() => {
+        // If we're not in a setup, change the directory back to where it was before the test.
+        // This allows tests to chdir without worrying about keeping the original directory.
+        if (allSetups.indexOf(relativeName) == -1 && previousDir) {
+          process.chdir(previousDir);
+        }
+      })
       .then(() => printFooter(currentFileName, start),
             (err) => {
               printFooter(currentFileName, start);