tests: add tests command (bug 1887042)

- add tests management command that runs pytest
- invoke command from github workflow

.github/workflows/build.yml

@@ -41,4 +41,4 @@ jobs:
           source env/bin/activate
           lando migrate
           lando test
-          pytest src/lando/api
+          lando tests

pyproject.toml

@@ -35,3 +35,6 @@ where = ["src"]
 
 [tool.pytest.ini_options]
 DJANGO_SETTINGS_MODULE = "lando.test_settings"
+testpaths = [
+    "src/lando/api",
+]

src/lando/utils/management/commands/tests.py

@@ -0,0 +1,26 @@
+import subprocess
+
+from django.conf import settings
+from django.core.management.base import BaseCommand
+
+ROOT_DIR = settings.BASE_DIR.parent.parent
+
+
+class Command(BaseCommand):
+    help = "Run pytest"
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "--exitfirst",
+            "-x",
+            action="store_true",
+            help="Exit instantly on first error or failed test"
+        )
+
+    def handle(self, *args, **options):
+        command = ["pytest"]
+
+        if options["exitfirst"]:
+            command.append("-x")
+
+        subprocess.call(command, cwd=ROOT_DIR)