dvc: initial unittests

Initial unittests for new design.

Signed-off-by: Ruslan Kuprieiev <[email protected]>

tests/test_remove.py

@@ -0,0 +1,28 @@
+import os
+
+from dvc.stage import Stage, OutputOutsideOfRepoError
+from dvc.project import StageNotFoundError
+
+from tests.basic_env import TestDvc
+
+
+class TestRemove(TestDvc):
+    def test(self):
+        stage = self.dvc.add(self.FOO)
+        stages_removed = self.dvc.remove(self.FOO)
+
+        self.assertEqual(len(stages_removed), 1)
+        self.assertIsInstance(stages_removed[0], Stage)
+        self.assertEqual(stage.path, stages_removed[0].path)
+
+
+class TestRemoveNonExistentFile(TestDvc):
+    def test(self):
+        with self.assertRaises(StageNotFoundError) as cx:
+            self.dvc.remove('non_existent_file')
+
+
+class TestRemoveFileOutsideOfRepo(TestDvc):
+    def test(self):
+        with self.assertRaises(OutputOutsideOfRepoError) as cx:
+            self.dvc.remove(os.path.join(os.path.dirname(self.dvc.root_dir), self.FOO))