feat(rules): Added Directory rule

Author: ricardogobbosouza

README.md

@@ -95,6 +95,7 @@ The library can be loaded either as a standalone script, or through an [AMD](htt
 - [Cpf](docs/cpf.md)
 - [DateTime](docs/date-time.md)
 - [Digit](docs/digit.md)
+- [Directory](docs/directory.md)
 - [Empty](docs/empty.md)
 - [EndsWith](docs/ends-width.md)
 - [Equals](docs/equals.md)

awesome-validator.min.js

@@ -0,0 +1,15 @@
+# Directory
+
+Validates directories.
+
+Valid values:
+
+```js
+validator.directory().validate(__dirname);
+```
+
+Invalid values:
+
+```js
+validator.directory().validate(__filename);
+```

docs/directory.md

@@ -0,0 +1,13 @@
+import { Stats } from 'fs';
+
+import { AbstractFileSystem } from './abstract-file-system';
+
+export class Directory extends AbstractFileSystem {
+
+    /**
+     * Validate File System.
+     */
+    protected validateFileSystem(stats: Stats): boolean {
+        return stats.isDirectory();
+    }
+}

src/rules/directory.ts

@@ -16,6 +16,7 @@ export * from './contains';
 export * from './cpf';
 export * from './date-time';
 export * from './digit';
+export * from './directory';
 export * from './empty';
 export * from './ends-with';
 export * from './equals';

src/rules/index.ts

@@ -0,0 +1,42 @@
+import * as fs from 'fs';
+import * as mock from 'mock-fs';
+import * as tempy from 'tempy';
+
+import { assert } from 'chai';
+
+import { AbstractRule } from '../../src/rules/abstract-rule';
+import { Directory } from '../../src/rules/directory';
+
+describe('Directory', () => {
+
+    let directory: Directory;
+
+    beforeEach(() => {
+        directory = new Directory();
+
+        mock({
+            'dir': {},
+            'file.txt': 'foo'
+        });
+    });
+
+    afterEach(() => {
+        mock.restore();
+    });
+
+    it('is rule', () => {
+        assert.instanceOf(directory, AbstractRule);
+    });
+
+    it('values is valid', () => {
+        assert.isTrue(directory.validate('dir'));
+        assert.isTrue(directory.validate(fs.statSync(tempy.directory())));
+    });
+
+    it('values is not valid', () => {
+        assert.isFalse(directory.validate('foo'));
+        assert.isFalse(directory.validate('file.txt'));
+        assert.isFalse(directory.validate(__filename));
+    });
+
+});

test/rules/directory.ts

@@ -15,6 +15,7 @@ describe('File', () => {
         file = new File();
 
         mock({
+            'dir': {},
             'file.txt': 'foo'
         });
     });
@@ -33,8 +34,8 @@ describe('File', () => {
     });
 
     it('values is not valid', () => {
-        assert.isFalse(file.validate(''));
         assert.isFalse(file.validate('foo'));
+        assert.isFalse(file.validate('dir'));
         assert.isFalse(file.validate(__dirname));
     });