Fix username check

tests/users.py

@@ -11,13 +11,13 @@ def test_user():
     Validate user id and name setting
     """
     ts = str(time.time())
+    username = 'yuvipanda'
     with tempfile.TemporaryDirectory() as tmpdir:
-        username = os.getlogin()
         subprocess.check_call([
             'repo2docker',
             '-v', '{}:/home/{}'.format(tmpdir, username),
             '--user-id', '1000',
-            '--user-name', 'yuvipanda',
+            '--user-name', username,
             tmpdir,
             '--',
             '/bin/bash',
@@ -27,8 +27,8 @@ def test_user():
         with open(os.path.join(tmpdir, 'id')) as f:
             assert f.read().strip() == '1000'
         with open(os.path.join(tmpdir, 'pwd')) as f:
-            assert f.read().strip() == '/home/yuvipanda'
+            assert f.read().strip() == '/home/{}'.format(username)
         with open(os.path.join(tmpdir, 'name')) as f:
-            assert f.read().strip() == 'yuvipanda'
-        with open(os.path.join(tmpdir, 'env_user')) as f:
-            assert f.read().strip() == 'yuvipanda'
+            assert f.read().strip() == username
+        with open(os.path.join(tmpdir, 'name')) as f:
+            assert f.read().strip() == username