ignore files files which are not found by files() (#2538)

* rename lookup-files.spec.js to file-utils.spec.js

* .files should not choke on broken symlinks

karma.conf.js

@@ -23,7 +23,7 @@ module.exports = function (config) {
     exclude: [
       'test/acceptance/http.spec.js',
       'test/acceptance/fs.spec.js',
-      'test/acceptance/lookup-files.spec.js',
+      'test/acceptance/file-utils.spec.js',
       'test/acceptance/require/**/*.js',
       'test/acceptance/misc/**/*.js'
     ],

lib/utils.js

@@ -16,6 +16,7 @@ var join = path.join;
 var readdirSync = require('fs').readdirSync;
 var statSync = require('fs').statSync;
 var watchFile = require('fs').watchFile;
+var lstatSync = require('fs').lstatSync;
 var toISOString = require('./to-iso-string');
 
 /**
@@ -252,7 +253,7 @@ exports.files = function (dir, ext, ret) {
     .filter(ignored)
     .forEach(function (path) {
       path = join(dir, path);
-      if (statSync(path).isDirectory()) {
+      if (lstatSync(path).isDirectory()) {
         exports.files(path, ext, ret);
       } else if (path.match(re)) {
         ret.push(path);

test/acceptance/file-utils.spec.js

@@ -0,0 +1,112 @@
+'use strict';
+
+var utils = require('../../lib/utils');
+var fs = require('fs');
+var path = require('path');
+var os = require('os');
+var mkdirp = require('mkdirp');
+var rimraf = require('rimraf');
+
+describe('file utils', function () {
+  var tmpDir = path.join(os.tmpDir(), 'mocha-file-lookup');
+  var existsSync = fs.existsSync;
+  var tmpFile = path.join.bind(path, tmpDir);
+  var symlinkSupported = false;
+
+  (function testSymlinkSupport () {
+    makeTempDir();
+
+    fs.writeFileSync(tmpFile('mocha-utils.js'), 'yippy skippy ying yang yow');
+    try {
+      fs.symlinkSync(tmpFile('mocha-utils.js'), tmpFile('mocha-utils-link.js'));
+      symlinkSupported = true;
+    } catch (ignored) {
+      // ignored
+    } finally {
+      removeTempDir();
+    }
+  }());
+
+  beforeEach(function () {
+    makeTempDir();
+
+    fs.writeFileSync(tmpFile('mocha-utils.js'), 'yippy skippy ying yang yow');
+    if (symlinkSupported) {
+      fs.symlinkSync(tmpFile('mocha-utils.js'), tmpFile('mocha-utils-link.js'));
+    }
+  });
+
+  describe('.lookupFiles', function () {
+    (symlinkSupported ? it : it.skip)('should not return broken symlink file path', function () {
+      expect(utils.lookupFiles(tmpDir, ['js'], false))
+        .to
+        .contain(tmpFile('mocha-utils-link.js'))
+        .and
+        .contain(tmpFile('mocha-utils.js'))
+        .and
+        .have
+        .length(2);
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to
+        .be(true);
+      fs.renameSync(tmpFile('mocha-utils.js'), tmpFile('bob'));
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to
+        .be(false);
+      expect(utils.lookupFiles(tmpDir, ['js'], false))
+        .to
+        .eql([]);
+    });
+
+    it('should accept a glob "path" value', function () {
+      var res = utils.lookupFiles(tmpFile('mocha-utils*'), ['js'], false)
+        .map(path.normalize.bind(path));
+
+      var expectedLength = 0;
+      var ex = expect(res)
+        .to
+        .contain(tmpFile('mocha-utils.js'));
+      expectedLength++;
+
+      if (symlinkSupported) {
+        ex = ex.and
+          .contain(tmpFile('mocha-utils-link.js'));
+        expectedLength++;
+      }
+
+      ex.and
+        .have
+        .length(expectedLength);
+    });
+  });
+
+  describe('.files', function () {
+    (symlinkSupported ? it : it.skip)('should return broken symlink file path', function () {
+      expect(utils.files(tmpDir, ['js']))
+        .to.contain(tmpFile('mocha-utils-link.js'))
+        .and.contain(tmpFile('mocha-utils.js'))
+        .and.have.length(2);
+
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to.be(true);
+
+      fs.renameSync(tmpFile('mocha-utils.js'), tmpFile('bob'));
+
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to.be(false);
+
+      expect(utils.files(tmpDir, ['js']))
+        .to.eql([tmpFile('mocha-utils-link.js')]);
+    });
+  });
+
+  afterEach(removeTempDir);
+
+  function makeTempDir () {
+    mkdirp.sync(tmpDir);
+  }
+
+  function removeTempDir () {
+    rimraf.sync(tmpDir);
+  }
+});