1 files changed, 83 insertions, 0 deletions
diff --git a/lib/fs/__tests__/mock.js b/lib/fs/__tests__/mock.js
new file mode 100644
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+++ b/lib/fs/__tests__/mock.js
@@ -0,0 +1,83 @@
+jest.autoMockOff();
+
+describe('MockFS', function() {
+    var createMockFS = require('../mock');
+    var fs = createMockFS({
+        'README.md': 'Hello World',
+        'SUMMARY.md': '# Summary',
+        'folder': {
+            'test.md': 'Cool',
+            'folder2': {
+                'hello.md': 'Hello',
+                'world.md': 'World'
+            }
+        }
+    });
+
+    describe('exists', function() {
+        pit('must return true for a file', function() {
+            return fs.exists('README.md')
+            .then(function(result) {
+                expect(result).toBeTruthy();
+            });
+        });
+
+        pit('must return false for a non existing file', function() {
+            return fs.exists('README_NOTEXISTS.md')
+            .then(function(result) {
+                expect(result).toBeFalsy();
+            });
+        });
+
+        pit('must return true for a directory', function() {
+            return fs.exists('folder')
+            .then(function(result) {
+                expect(result).toBeTruthy();
+            });
+        });
+
+        pit('must return true for a deep file', function() {
+            return fs.exists('folder/test.md')
+            .then(function(result) {
+                expect(result).toBeTruthy();
+            });
+        });
+
+        pit('must return true for a deep file (2)', function() {
+            return fs.exists('folder/folder2/hello.md')
+            .then(function(result) {
+                expect(result).toBeTruthy();
+            });
+        });
+    });
+
+    describe('readAsString', function() {
+        pit('must return content for a file', function() {
+            return fs.readAsString('README.md')
+            .then(function(result) {
+                expect(result).toBe('Hello World');
+            });
+        });
+
+        pit('must return content for a deep file', function() {
+            return fs.readAsString('folder/test.md')
+            .then(function(result) {
+                expect(result).toBe('Cool');
+            });
+        });
+    });
+
+    describe('readDir', function() {
+        pit('must return content for a directory', function() {
+            return fs.readDir('./')
+            .then(function(files) {
+                expect(files.size).toBe(3);
+                expect(files.includes('README.md')).toBeTruthy();
+                expect(files.includes('SUMMARY.md')).toBeTruthy();
+                expect(files.includes('folder/')).toBeTruthy();
+            });
+        });
+    });
+});
+
+