OMG we're running a hook

tests/conftest.py

@@ -66,6 +66,7 @@ setup(
         local.path('__init__.py').write('')
         local.path('main.py').write("""
 def func():
+    print 'Hello World'
     return 0
     """)
 

tests/languages/all_test.py

@@ -0,0 +1,15 @@
+
+import pytest
+
+import pre_commit.constants as C
+from pre_commit.languages.all import languages
+
+
+def test_all_languages_have_repo_setups():
+    assert set(languages.keys()) == C.SUPPORTED_LANGUAGES
+
+
+@pytest.mark.parametrize('language', C.SUPPORTED_LANGUAGES)
+def test_all_languages_support_interface(language):
+    assert hasattr(languages[language], 'install_environment')
+    assert hasattr(languages[language], 'run_hook')

tests/repository_test.py

@@ -30,7 +30,6 @@ def test_create_repo_in_env(dummy_repo_config, dummy_git_repo):
 @pytest.mark.integration
 def test_install_python_repo_in_env(python_pre_commit_git_repo, config_for_python_pre_commit_git_repo):
     repo = Repository(config_for_python_pre_commit_git_repo)
-    # TODO: do we need create here?
     repo.install()
 
     assert os.path.exists(
@@ -43,6 +42,16 @@ def test_install_python_repo_in_env(python_pre_commit_git_repo, config_for_pytho
     )
 
 
+@pytest.mark.integration
+def test_run_a_hook_omg(config_for_python_pre_commit_git_repo):
+    repo = Repository(config_for_python_pre_commit_git_repo)
+    repo.install()
+    ret = repo.run_hook('foo', [])
+
+    assert ret[0] == 0
+    assert ret[1] == 'Hello World\n'
+
+
 @pytest.fixture
 def mock_repo_config():
     config = {