1 files changed, 53 insertions, 0 deletions
diff --git a/testing/raptor/test/test_print_tests.py b/testing/raptor/test/test_print_tests.py
new file mode 100644
index 0000000000..739d3b0d6c
--- /dev/null
+++ b/testing/raptor/test/test_print_tests.py
@@ -0,0 +1,53 @@
+import os
+
+import mozunit
+import pytest
+
+# need this so raptor imports work both from /raptor and via mach
+here = os.path.abspath(os.path.dirname(__file__))
+from raptor import cmdline
+
+
+def test_pageload_subtests(capsys, monkeypatch, tmpdir):
+    # cmdline.py is hard-coded to use raptor.ini from the same directory so we need
+    # to monkey patch os.dirname, which is not ideal. If we could make --print-tests
+    # respect the --test path that would be much better.
+    def mock(path):
+        return str(tmpdir)
+
+    monkeypatch.setattr(os.path, "dirname", mock)
+    manifest = tmpdir.join("raptor.ini")
+    manifest.write(
+        """
+[DEFAULT]
+type = pageload
+apps = firefox
+
+[raptor-subtest-1]
+measure = foo, bar
+
+[raptor-subtest-2]
+"""
+    )
+    with pytest.raises(SystemExit):
+        cmdline.parse_args(["--print-tests"])
+    captured = capsys.readouterr()
+    assert (
+        captured.out
+        == """
+Raptor Tests Available for Firefox Desktop
+==========================================
+
+raptor
+  type: pageload
+  subtests:
+    raptor-subtest-1 (foo, bar)
+    raptor-subtest-2
+
+Done.
+"""
+    )
+
+
+if __name__ == "__main__":
+    mozunit.main()