1 files changed, 145 insertions, 0 deletions
diff --git a/tools/tryselect/test/test_mozharness_integration.py b/tools/tryselect/test/test_mozharness_integration.py
new file mode 100644
index 0000000000..abeaaf370e
--- /dev/null
+++ b/tools/tryselect/test/test_mozharness_integration.py
@@ -0,0 +1,145 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import json
+import os
+
+import mozunit
+import pytest
+from mozfile import load_source
+from tryselect.tasks import build, resolve_tests_by_suite
+
+MOZHARNESS_SCRIPTS = {
+    "android_emulator_unittest": {
+        "class_name": "AndroidEmulatorTest",
+        "configs": [
+            "android/android_common.py",
+        ],
+        "xfail": [
+            "cppunittest",
+            "crashtest-qr",
+            "gtest",
+            "geckoview-junit",
+            "jittest",
+            "jsreftest",
+            "reftest-qr",
+        ],
+    },
+    "desktop_unittest": {
+        "class_name": "DesktopUnittest",
+        "configs": [
+            "unittests/linux_unittest.py",
+            "unittests/mac_unittest.py",
+            "unittests/win_unittest.py",
+        ],
+        "xfail": [
+            "cppunittest",
+            "gtest",
+            "jittest",
+            "jittest-chunked",
+            "jittest1",
+            "jittest2",
+            "jsreftest",
+            "mochitest-valgrind-plain",
+            "reftest-no-accel",
+            "reftest-snapshot",
+            "xpcshell-msix",
+        ],
+    },
+}
+"""A suite being listed in a script's `xfail` list  means it won't work
+properly with MOZHARNESS_TEST_PATHS (the mechanism |mach try fuzzy <path>|
+uses).
+"""
+
+
+def get_mozharness_test_paths(name):
+    scriptdir = os.path.join(build.topsrcdir, "testing", "mozharness")
+    mod = load_source(
+        "scripts." + name, os.path.join(scriptdir, "scripts", name + ".py")
+    )
+
+    class_name = MOZHARNESS_SCRIPTS[name]["class_name"]
+    cls = getattr(mod, class_name)
+    return cls(require_config_file=False)._get_mozharness_test_paths
+
+
+@pytest.fixture(scope="module")
+def all_suites():
+    from moztest.resolve import _test_flavors, _test_subsuites
+
+    all_suites = []
+    for flavor in _test_flavors:
+        all_suites.append({"flavor": flavor, "srcdir_relpath": "test"})
+
+    for flavor, subsuite in _test_subsuites:
+        all_suites.append(
+            {"flavor": flavor, "subsuite": subsuite, "srcdir_relpath": "test"}
+        )
+
+    return all_suites
+
+
+def generate_suites_from_config(path):
+    parent, name = os.path.split(path)
+    name = os.path.splitext(name)[0]
+
+    configdir = os.path.join(
+        build.topsrcdir, "testing", "mozharness", "configs", parent
+    )
+
+    mod = load_source(name, os.path.join(configdir, name + ".py"))
+
+    config = mod.config
+
+    for category in sorted(config["suite_definitions"]):
+        key = "all_{}_suites".format(category)
+        if key not in config:
+            yield category,
+            continue
+
+        for suite in sorted(config["all_{}_suites".format(category)]):
+            yield category, suite
+
+
+def generate_suites():
+    for name, script in MOZHARNESS_SCRIPTS.items():
+        seen = set()
+
+        for path in script["configs"]:
+            for suite in generate_suites_from_config(path):
+                if suite in seen:
+                    continue
+                seen.add(suite)
+
+                item = (name, suite)
+
+                if suite[-1] in script["xfail"]:
+                    item = pytest.param(item, marks=pytest.mark.xfail)
+
+                yield item
+
+
+def idfn(item):
+    name, suite = item
+    return "{}/{}".format(name, suite[-1])
+
+
+@pytest.mark.parametrize("item", generate_suites(), ids=idfn)
+def test_suites(item, patch_resolver, all_suites):
+    """An integration test to make sure the suites returned by
+    `tasks.resolve_tests_by_suite` match up with the names defined in
+    mozharness.
+    """
+    patch_resolver([], all_suites)
+    suites = resolve_tests_by_suite(["test"])
+    os.environ["MOZHARNESS_TEST_PATHS"] = json.dumps(suites)
+
+    name, suite = item
+    func = get_mozharness_test_paths(name)
+    assert func(*suite)
+
+
+if __name__ == "__main__":
+    mozunit.main()