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#!/usr/bin/env python3
# Copyright 2025 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import eslint_ts
import os
import tempfile
import shutil
import unittest
_HERE_DIR = os.path.dirname(__file__)
class EslintTsTest(unittest.TestCase):
_in_folder = os.path.join(_HERE_DIR, "tests", "eslint_ts")
def setUp(self):
self._out_dir = tempfile.mkdtemp(dir=self._in_folder)
def tearDown(self):
shutil.rmtree(self._out_dir)
def _read_file(self, path):
with open(path, "r", encoding="utf-8") as file:
return file.read()
def _run_test(self, in_files):
config_base = os.path.join(_HERE_DIR, "eslint_ts.config_base.mjs")
tsconfig = os.path.join(self._in_folder, "tsconfig.json")
args = [
"--in_folder",
self._in_folder,
"--out_folder",
self._out_dir,
"--config_base",
os.path.relpath(config_base, self._out_dir).replace(os.sep, '/'),
"--tsconfig",
os.path.relpath(tsconfig, self._out_dir).replace(os.sep, '/'),
"--in_files",
*in_files,
]
eslint_ts.main(args)
def testSuccess(self):
self._run_test(["no_violations.ts"])
actual_contents = self._read_file(
os.path.join(self._out_dir, "eslint.config.mjs"))
expected_contents = self._read_file(
os.path.join(self._in_folder, "eslint_expected.config.mjs"))
self.assertMultiLineEqual(expected_contents, actual_contents)
def testError(self):
with self.assertRaises(RuntimeError) as context:
self._run_test(["with_violations.ts"])
# Expected ESLint rule violation that should be part of the error output.
_EXPECTED_STRING = "@typescript-eslint/require-await"
self.assertTrue(_EXPECTED_STRING in str(context.exception))
def testWebUiEslintPlugin_LitPropertyAccessor(self):
with self.assertRaises(RuntimeError) as context:
self._run_test(["with_webui_plugin_lit_violations.ts"])
_EXPECTED_STRING = "@webui-eslint/lit-property-accessor"
self.assertTrue(_EXPECTED_STRING in str(context.exception))
errors = [
"Missing 'accessor' keyword when declaring Lit reactive property 'prop2' in class 'SomeElement'",
"Unnecessary 'accessor' keyword when declaring regular (non Lit reactive) property 'prop3' in class 'SomeElement'",
"Missing 'accessor' keyword when declaring Lit reactive property 'prop1' in class 'SomeOtherElement'",
"Unnecessary 'accessor' keyword when declaring regular (non Lit reactive) property 'prop4' in class 'SomeOtherElement'",
]
for e in errors:
self.assertTrue(e in str(context.exception))
def testWebUiEslintPlugin_PolymerPropertyDeclare(self):
with self.assertRaises(RuntimeError) as context:
self._run_test(["with_webui_plugin_polymer_violations.ts"])
_EXPECTED_STRING = "@webui-eslint/polymer-property-declare"
self.assertTrue(_EXPECTED_STRING in str(context.exception))
errors = [
"Missing 'declare' keyword when declaring Polymer property 'prop2' in class 'SomeElement'",
"Unnecessary 'declare' keyword when declaring regular (non Polymer) property 'prop3' in class 'SomeElement'",
"Missing 'declare' keyword when declaring Polymer property 'prop1' in class 'SomeOtherElement'",
"Unnecessary 'declare' keyword when declaring regular (non Polymer) property 'prop4' in class 'SomeOtherElement'",
]
for e in errors:
self.assertTrue(e in str(context.exception))
def testWebUiEslintPlugin_PolymerPropertyClassMember(self):
with self.assertRaises(RuntimeError) as context:
self._run_test(
["with_webui_plugin_polymer_property_class_member_violations.ts"])
_EXPECTED_STRING = "@webui-eslint/polymer-property-class-member"
self.assertTrue(_EXPECTED_STRING in str(context.exception))
errors = [
"Polymer property 'prop3' in class 'SomeElement' must also be declared as a class member",
"Polymer property 'prop1' in class 'SomeOtherElement' must also be declared as a class member",
]
for e in errors:
self.assertTrue(e in str(context.exception))
if __name__ == "__main__":
unittest.main()
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