test: use tmp directory in chdir test

This patch

 - makes chdir test to use the tmp directory
 - moves the test to parallel
 - renames the file to test-process-chdir as chdir is in process module

test/parallel/test-process-chdir.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+assert.notStrictEqual(process.cwd(), __dirname);
+process.chdir(__dirname);
+assert.strictEqual(process.cwd(), __dirname);
+
+const dir = path.resolve(common.tmpDir,
+    'weird \uc3a4\uc3ab\uc3af characters \u00e1\u00e2\u00e3');
+
+// Make sure that the tmp directory is clean
+common.refreshTmpDir();
+
+fs.mkdirSync(dir);
+process.chdir(dir);
+assert.strictEqual(process.cwd(), dir);
+
+process.chdir('..');
+assert.strictEqual(process.cwd(), path.resolve(common.tmpDir));
+
+assert.throws(function() { process.chdir({}); }, TypeError, 'Bad argument.');
+assert.throws(function() { process.chdir(); }, TypeError, 'Bad argument.');
+assert.throws(function() { process.chdir('x', 'y'); },
+              TypeError, 'Bad argument.');