diff --git a/cheat/test/test_sheet.py b/cheat/test/test_sheet.py
new file mode 100644
index 0000000..14595dc
--- /dev/null
+++ b/cheat/test/test_sheet.py
@@ -0,0 +1,82 @@
+from mock import patch
+import os
+from tempfile import mkdtemp
+from unittest import TestCase
+
+from cheat import sheet
+
+
+class TestSheet(TestCase):
+    def setUp(self):
+        self.tmp_dir = mkdtemp()
+
+        self.editor = patch('cheat.sheet.editor').start()
+        self.editor.return_value = 'vim'
+
+        self.die = patch('cheat.sheet.die').start()
+
+        self.builtin_path = os.path.join(self.tmp_dir, 'builtin')
+        os.mkdir(self.builtin_path)
+
+        self.default_path = os.path.join(self.tmp_dir, 'default')
+        os.mkdir(self.default_path)
+        self.sheets_default_path = \
+            patch('cheat.sheet.sheets.default_path').start()
+        self.sheets_default_path.return_value = self.default_path
+
+        self.sheets_paths = patch('cheat.sheet.sheets.paths').start()
+        self.sheets_paths.return_value = [
+            self.default_path, self.builtin_path,
+        ]
+
+        self.subprocess = patch('cheat.sheet.subprocess').start()
+
+    def test_create_or_edit_when_sheet_inexist(self):
+        sheet.create_or_edit('new')
+
+        self.subprocess.call.assert_called_with([
+            'vim', os.path.join(self.default_path, 'new')])
+
+    def test_create_or_edit_when_sheet_inexist_at_default_path(self):
+        cheat_path = os.path.join(self.builtin_path, 'cheat')
+        with open(cheat_path, 'w') as f:
+            f.write((
+                'cheatsheet for cheat\n'
+                'cheat cheat\n'
+            ))
+
+        sheet.create_or_edit('cheat')
+
+        new_cheat_path = os.path.join(self.default_path, 'cheat')
+        self.assertTrue(os.path.exists(new_cheat_path))
+        with open(new_cheat_path, 'r') as f:
+            self.assertEqual(
+                f.read(),
+                ('cheatsheet for cheat\n'
+                 'cheat cheat\n')
+            )
+
+        self.subprocess.call.assert_called_with([
+            'vim', new_cheat_path])
+
+    def test_create_or_edit_when_sheet_exist_at_default_path(self):
+        cheat_path = os.path.join(self.default_path, 'cheat')
+        open(cheat_path, 'w').close()
+
+        sheet.create_or_edit('cheat')
+        self.subprocess.call.assert_called_with([
+            'vim', cheat_path])
+
+    def test_read(self):
+        cheat_path = os.path.join(self.builtin_path, 'cheat')
+        with open(cheat_path, 'w') as f:
+            f.write((
+                'cheatsheet for cheat\n'
+                'cheat cheat\n'
+            ))
+
+        self.assertEqual(
+            sheet.read('cheat'),
+            ('cheatsheet for cheat\n'
+             'cheat cheat\n')
+        )