Add: Add Git method for getting the commit log

pontos/git/git.py

@@ -424,3 +424,17 @@ def checkout(
             args = ["checkout", branch]
 
         exec_git(*args, cwd=self._cwd)
+
+    def log(self, *log_args: str, oneline: Optional[bool] = None) -> List[str]:
+        """
+        Get log of a git repository
+
+        Args:
+        """
+        args = ["log"]
+        if oneline:
+            args.append("--oneline")
+
+        args.extend(log_args)
+
+        return exec_git(*args, cwd=self._cwd).splitlines()

tests/git/test_git.py

@@ -432,3 +432,48 @@ def test_remote_url_with_default(self, exec_git_mock):
         )
 
         self.assertEqual(remote, url)
+
+    @patch("pontos.git.git.exec_git")
+    def test_log(self, exec_git_mock):
+        # pylint: disable=line-too-long
+        exec_git_mock.return_value = """commit 68c6c3785bbb049df63dc51f8b5b709eb19f8517
+Author: Björn Ricks <[email protected]>
+Date:   Wed Apr 8 15:16:05 2020 +0200
+
+    Add a draft for a README.md document
+
+commit 464f24d43d7293091b168c6b37ee37978a650958
+Author: Björn Ricks <[email protected]>
+Date:   Wed Apr 8 14:28:53 2020 +0200
+
+    Initial commit
+"""
+
+        git = Git()
+        logs = git.log()
+
+        exec_git_mock.assert_called_once_with("log", cwd=None)
+
+        self.assertEqual(
+            logs[0], "commit 68c6c3785bbb049df63dc51f8b5b709eb19f8517"
+        )
+        self.assertEqual(
+            logs[6], "commit 464f24d43d7293091b168c6b37ee37978a650958"
+        )
+
+    @patch("pontos.git.git.exec_git")
+    def test_log_with_oneline(self, exec_git_mock):
+        exec_git_mock.return_value = """50f9963 Add CircleCI config for pontos
+9a8feaa Rename to pontos only
+047cfae Update README for installation and development
+e6ea80d Update README
+68c6c37 Add a draft for a README.md document
+464f24d Initial commit"""
+
+        git = Git()
+        logs = git.log(oneline=True)
+
+        exec_git_mock.assert_called_once_with("log", "--oneline", cwd=None)
+
+        self.assertEqual(logs[0], "50f9963 Add CircleCI config for pontos")
+        self.assertEqual(logs[5], "464f24d Initial commit")