Add some simple cli tests

tests/test_cli.py

@@ -1,3 +1,53 @@
 import unittest
+import unittest.mock
+import json
+
+from typer.testing import CliRunner
 
 from nixprstatus.app import app
+
+from tests.helpers.mocks import mocked_requests_get
+
+runner = CliRunner()
+
+
+class TestCli(unittest.TestCase):
+    def test_help(self):
+        result = runner.invoke(app, ["--help"])
+        self.assertEqual(result.exit_code, 0)
+        self.assertIn("Usage: root [OPTIONS] COMMAND [ARGS]...", result.output)
+        self.assertIn("--show-completion", result.output)
+        self.assertIn("Commands:", result.output)
+        self.assertIn("pr", result.output)
+        self.assertIn("watchlist", result.output)
+        self.assertIn("since", result.output)
+
+    def test_pr_help(self):
+        result = runner.invoke(app, ["pr", "--help"])
+        self.assertEqual(result.exit_code, 0)
+        self.assertIn("Usage: root pr [OPTIONS] PR..", result.output)
+        self.assertIn("Options:", result.output)
+
+    @unittest.mock.patch("requests.get", side_effect=mocked_requests_get)
+    def test_pr_single_simple(self, mock_get):
+        result = runner.invoke(app, ["pr", "345583"])
+        print(result.exception)
+        self.assertEqual(result.exit_code, 0)
+        self.assertIn("wireshark: 4.2.6 -> 4.2.7", result.output)
+
+    @unittest.mock.patch("requests.get", side_effect=mocked_requests_get)
+    def test_pr_single_json(self, mock_get):
+        result = runner.invoke(app, ["pr", "--format", "json", "345583"])
+        self.assertEqual(result.exit_code, 0)
+        expected = {
+            "title": "wireshark: 4.2.6 -> 4.2.7",
+            "merged": True,
+            "branches": {
+                "master": True,
+                "nixos-unstable-small": True,
+                "nixos-unstable": True,
+                "nixos-24.05 (#346022)": True,
+            },
+        }
+        output = json.loads(result.output)
+        self.assertEqual(output, expected)