moved the installing code to its own package

tests/conftest.py

@@ -1,5 +1,6 @@
 
 import pytest
+import pre_commit.constants as C
 from plumbum import local
 
 
@@ -7,4 +8,73 @@ from plumbum import local
 def empty_git_dir(tmpdir):
     with local.cwd(tmpdir.strpath):
         local['git']['init']()
-        yield tmpdir.strpath
+        yield tmpdir.strpath
+
+
+
+def add_and_commit():
+    local['git']['add', '.']()
+    local['git']['commit', '-m', 'random commit', '--author', 'A U Thor <author@example.com>']()
+
+
+@pytest.yield_fixture
+def dummy_git_repo(empty_git_dir):
+    local['touch']['dummy']()
+    add_and_commit()
+
+    yield empty_git_dir
+
+
+@pytest.yield_fixture
+def dummy_pre_commit_hooks_git_repo(dummy_git_repo):
+    local.path(C.MANIFEST_FILE).write("""
+hooks:
+    -
+        id: foo
+        name: Foo
+        entry: foo
+        language: python>2.6
+    """)
+
+    add_and_commit()
+
+    yield dummy_git_repo
+
+@pytest.yield_fixture
+def python_pre_commit_git_repo(dummy_pre_commit_hooks_git_repo):
+    local.path('setup.py').write(
+"""
+from setuptools import find_packages
+from setuptools import setup
+
+setup(
+    name='Foo',
+    version='0.0.0',
+    packages=find_packages('.'),
+    entry_points={
+        'console_scripts': [
+            'entry = foo.main:func'
+        ],
+    }
+)
+"""
+    )
+
+    foo_module = local.path('foo')
+
+    foo_module.mkdir()
+
+    with local.cwd(foo_module):
+        local.path('__init__.py').write('')
+        local.path('main.py').write(
+"""
+
+def func():
+    return 0
+
+"""
+        )
+
+    add_and_commit()
+
+    yield dummy_pre_commit_hooks_git_repo