"""Test cases for inferring always defined attributes in classes."""

import os.path

from mypy.test.config import test_temp_dir
from mypy.test.data import DataDrivenTestCase
from mypy.errors import CompileError

from mypyc.test.testutil import (
    ICODE_GEN_BUILTINS, use_custom_builtins, MypycDataSuite, build_ir_for_single_file2,
    assert_test_output, infer_ir_build_options_from_test_name
)

files = [
    'alwaysdefined.test'
]


class TestAlwaysDefined(MypycDataSuite):
    files = files
    base_path = test_temp_dir

    def run_case(self, testcase: DataDrivenTestCase) -> None:
        """Perform a runtime checking transformation test case."""
        options = infer_ir_build_options_from_test_name(testcase.name)
        if options is None:
            # Skipped test case
            return
        with use_custom_builtins(os.path.join(self.data_prefix, ICODE_GEN_BUILTINS), testcase):
            try:
                ir = build_ir_for_single_file2(testcase.input, options)
            except CompileError as e:
                actual = e.messages
            else:
                actual = []
                for cl in ir.classes:
                    if cl.name.startswith('_'):
                        continue
                    actual.append('{}: [{}]'.format(
                        cl.name, ', '.join(sorted(cl._always_initialized_attrs))))

            assert_test_output(testcase, actual, 'Invalid test output', testcase.output)