fix: ensure pact dir exists

Signed-off-by: JP-Ellis <josh@jpellis.me>

Author: JP-Ellis

src/pact/message_pact.py

@@ -3,6 +3,7 @@
 
 import json
 import os
+from pathlib import Path
 from subprocess import Popen
 import warnings
 
@@ -176,16 +177,21 @@ def write_to_pact_file(self):
 
         :rtype: int
         """
+        pact_dir = Path(self.pact_dir).resolve()
         command = [
             MESSAGE_PATH,
             "update",
             json.dumps(self._messages[0]),
-            "--pact-dir", self.pact_dir,
+            "--pact-dir", str(pact_dir),
             f"--pact-specification-version={self.version}",
             "--consumer", f"{self.consumer.name}",
             "--provider", f"{self.provider.name}",
         ]
 
+        if not pact_dir.exists():
+            pact_dir.mkdir(parents=True)
+        elif not pact_dir.is_dir():
+            raise NotADirectoryError(f"{pact_dir} is not a directory")
         self._message_process = Popen(command)
         self._message_process.wait()
 

tests/test_message_pact.py

@@ -1,5 +1,6 @@
 import os
 import json
+from pathlib import Path
 
 from mock import patch
 from unittest import TestCase
@@ -242,7 +243,7 @@ def setUp(self):
 
     def test_call_pact_message_to_generate_pact_file(self):
         target = MessagePact(
-            self.consumer, self.provider, pact_dir='/pacts',
+            self.consumer, self.provider, pact_dir='pacts',
             version='3.0.0', file_write_mode='merge', publish_to_broker=True)
 
         (target
@@ -260,7 +261,7 @@ def test_call_pact_message_to_generate_pact_file(self):
         self.mock_Popen.assert_called_once_with([
             MESSAGE_PATH, 'update',
             json.dumps(target._messages[0]),
-            '--pact-dir', '/pacts',
+            '--pact-dir', str(Path("pacts").resolve()),
             '--pact-specification-version=3.0.0',
             '--consumer', 'TestConsumer',
             '--provider', 'TestProvider',