Add test for --exclude parameter

Adds tests for the current and new behavior of the `--exclude`
parameter. Turns out that it didn't work as I expected it to work,
namely that it doesn't accept glob patterns.

Author: fkling

bin/__tests__/react-docgen-test.js

@@ -239,11 +239,39 @@ describe('react-docgen CLI', () => {
         run([
           '--resolver='+path.join(__dirname, './example/customResolver.js'),
           path.join(__dirname, '../../example/components/Component.js'),
-        ]).then(([stdout, stderr]) => {
+        ]).then(([stdout]) => {
           expect(stdout).toContain('Custom');
         }),
       ]);
     }, TEST_TIMEOUT);
   });
 
+  describe('--exclude/-e', () => {
+    it('ignores files by name', () => {
+      createTempfiles(null, 'foo');
+      createTempfiles(null, 'bar');
+
+      var verify = ([stdout, stderr]) => {
+        expect(stdout).toBe('');
+        expect(stderr).toBe('');
+      };
+
+      return run(
+        ['--exclude=Component.js', '--exclude=NoComponent.js', tempDir]
+      ).then(verify);
+    }, TEST_TIMEOUT);
+
+    it('ignores files by regex', () => {
+      createTempfiles(null, 'foo');
+      createTempfiles(null, 'bar');
+
+      var verify = ([stdout, stderr]) => {
+        expect(stdout).toBe('');
+        expect(stderr).toBe('');
+      };
+
+      return run(['--exclude=/.*Component\\.js/', tempDir]).then(verify);
+    }, TEST_TIMEOUT);
+  });
+
 });

bin/react-docgen.js

@@ -38,7 +38,7 @@ argv
         ['js', 'jsx'])
     .option(
         '-e, --exclude <path>',
-        'Filename pattern to exclude. Default: ' + JSON.stringify(defaultExclude),
+        'Filename or regex to exclude. Default: ' + JSON.stringify(defaultExclude),
         collect,
         [])
     .option(
@@ -130,7 +130,7 @@ function traverseDir(filePath, result, done) {
     {
       match: extensions,
       exclude:excludePatterns,
-      excludeDir: ignoreDir
+      excludeDir: ignoreDir,
     },
     function(error, content, filename, next) {
       if (error) {