Add test for shallow clone HEAD

Author: daradib

tests/unit/test_clone_depth.py

@@ -1,5 +1,5 @@
 """
-Test that a clone depth of 1 is used and good enough when no refspec is used
+Test that a clone depth of 1 is used when HEAD or no refspec is used
 
 Note: the tests don't actually run the container. Building the
 container requires a specific repository and commit to be checked out,
@@ -25,7 +25,34 @@ def test_clone_depth():
             repo=URL,
             dry_run=True,
             run=False,
-            # turn of automatic clean up of the checkout so we can inspect it
+            # turn off automatic clean up of the checkout so we can inspect it
+            # we also set the work directory explicitly so we know where to look
+            cleanup_checkout=False,
+            git_workdir=d,
+        )
+        app.initialize()
+        app.start()
+
+        cmd = ["git", "rev-parse", "HEAD"]
+        p = subprocess.run(cmd, stdout=subprocess.PIPE, cwd=d)
+        assert p.stdout.strip() == b"703322e9c6635ba1835d3b92eafbabeca0042c3e"
+        cmd = ["git", "rev-list", "--count", "HEAD"]
+        p = subprocess.run(cmd, stdout=subprocess.PIPE, cwd=d)
+        assert p.stdout.strip() == b"1"
+        with open(os.path.join(d, "COMMIT")) as fp:
+            assert fp.read() == "100\n"
+
+
+def test_clone_depth_head():
+    """Test a remote repository, with a refspec of 'HEAD'"""
+
+    with TemporaryDirectory() as d:
+        app = Repo2Docker(
+            repo=URL,
+            ref="HEAD",
+            dry_run=True,
+            run=False,
+            # turn off automatic clean up of the checkout so we can inspect it
             # we also set the work directory explicitly so we know where to look
             cleanup_checkout=False,
             git_workdir=d,
@@ -52,7 +79,7 @@ def test_clone_depth_full():
             ref="master",
             dry_run=True,
             run=False,
-            # turn of automatic clean up of the checkout so we can inspect it
+            # turn off automatic clean up of the checkout so we can inspect it
             # we also set the work directory explicitly so we know where to look
             cleanup_checkout=False,
             git_workdir=d,
@@ -80,7 +107,7 @@ def test_clone_depth_full2():
             ref="703322e",
             dry_run=True,
             run=False,
-            # turn of automatic clean up of the checkout so we can inspect it
+            # turn off automatic clean up of the checkout so we can inspect it
             # we also set the work directory explicitly so we know where to look
             cleanup_checkout=False,
             git_workdir=d,
@@ -108,7 +135,7 @@ def test_clone_depth_mid():
             ref="8bc4f21",
             dry_run=True,
             run=False,
-            # turn of automatic clean up of the checkout so we can inspect it
+            # turn off automatic clean up of the checkout so we can inspect it
             # we also set the work directory explicitly so we know where to look
             cleanup_checkout=False,
             git_workdir=d,