chore: add test for #850

Signed-off-by: JP-Ellis <[email protected]>

Author: JP-Ellis

tests/test_issue.py

@@ -0,0 +1,36 @@
+"""
+Tests for user-reported issues.
+"""
+
+import json
+from pathlib import Path
+
+from pact import MessageConsumer, Provider, matchers
+
+
+def test_github_850() -> None:
+    """
+    See https://github.com/pact-foundation/pact-python/issues/850.
+    """
+    contract = MessageConsumer("my_contract_consumer").has_pact_with(
+        Provider("my_contract_provider"),
+        pact_dir="pacts",
+    )
+
+    event_data = {
+        "invoice_id": "12345",
+        "amount": 100.00,
+        "currency": "USD",
+        "created": matchers.Format().iso_8601_datetime(),
+    }
+
+    contract.given("Create contract").expects_to_receive(
+        "An event of contract"
+    ).with_content(event_data)
+
+    with contract:
+        pass
+
+    with Path("pacts/my_contract_consumer-my_contract_provider.json").open() as f:
+        data = json.load(f)
+    assert data["messages"][0]["contents"]["created"] == "1991-02-20T06:35:26+00:00"