Add tests for local content provider

tests/contentproviders/test_git.py

@@ -1,9 +1,8 @@
 from contextlib import contextmanager
-import shutil
 import os
 import subprocess
 from tempfile import TemporaryDirectory
-from repo2docker.contentproviders.git import Git
+from repo2docker.contentproviders import Git
 
 
 @contextmanager

tests/contentproviders/test_local.py

@@ -0,0 +1,37 @@
+import os
+from tempfile import TemporaryDirectory, NamedTemporaryFile
+
+from repo2docker.contentproviders import Local
+
+
+def test_detect_local_dir():
+    with TemporaryDirectory() as d:
+        local = Local()
+        spec = local.detect(d)
+
+        # should accept a local directory
+        assert spec is not None, spec
+        assert 'path' in spec, spec
+        assert spec['path'] == d
+
+
+def test_not_detect_local_file():
+    with NamedTemporaryFile() as f:
+        local = Local()
+        spec = local.detect(f.name)
+
+        # should NOT accept a local file
+        assert spec is None, spec
+
+
+def test_content_available():
+    # create a directory with files, check they are available in the output
+    # directory
+    with TemporaryDirectory() as d:
+        with open(os.path.join(d, 'test'), 'w') as f:
+            f.write("Hello")
+
+        spec = {'path': d}
+        for _ in Local().fetch(spec, d):
+            pass
+        assert os.path.exists(os.path.join(d, 'test'))