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Use custom script for test discovery
Standard test discovery is not available in Swift 5.0, but we want to support this version of Swift. Besides, standard test discovery doesn't work very well with CircleCI: https://bugs.swift.org/browse/SR-10783
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| """ | ||
| Parse test files and generate LinuxMain.swift. | ||
| This script uses simple regular expressions to extract test names from test files. | ||
| We don't use --enable-test-discovery because: | ||
| * it doesn't work with Swift 5.0 that we still support | ||
| * there are other problems with it: https://bugs.swift.org/browse/SR-10783 | ||
| """ | ||
| import sys | ||
|
|
||
| if sys.version_info < (3, 6, 0): | ||
| exit("This script only works with Python 3.6 and newer.") | ||
|
|
||
| import re | ||
| from pathlib import Path | ||
| from argparse import ArgumentParser | ||
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| TEST_METHOD_PATTERN = \ | ||
| re.compile(r"func\s*(test\w+)\s*\(\s*\)\s*(?:throws\s*)?{") | ||
| TEST_DISCOVERY_CONDITION_PATTERN = \ | ||
| re.compile(r"^#if (.+)\s*\/\/\s*TEST_DISCOVERY_CONDITION\s*$", flags=re.MULTILINE) | ||
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| def extract_test_names(test_file): | ||
| contents = test_file.read_text() | ||
| test_names = [match[1] for match in TEST_METHOD_PATTERN.finditer(contents)] | ||
| condition = TEST_DISCOVERY_CONDITION_PATTERN.search(contents) | ||
| return (test_names, condition[1] if condition else None) | ||
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| def generate_linuxmain(workdir): | ||
| workdir = Path(workdir) | ||
| tests_dir = workdir / "Tests" | ||
| test_files = (tests_dir / "OpenCombineTests").glob("*/*Tests.swift") | ||
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| with (tests_dir / "LinuxMain.swift").open(mode="w") as linuxmain: | ||
| linuxmain.write("""\ | ||
| import XCTest | ||
| @testable import OpenCombineTests | ||
| var tests = [XCTestCaseEntry]() | ||
| """) | ||
| for test_file in test_files: | ||
| (test_names, condition) = extract_test_names(test_file) | ||
| if not test_names: | ||
| continue | ||
| if condition: | ||
| linuxmain.write(f"#if {condition}\n") | ||
| linuxmain.write(f"let allTests_{test_file.stem} = [\n") | ||
| for test_name in test_names: | ||
| linuxmain.write(f" (\"{test_name}\", {test_file.stem}.{test_name}),\n") | ||
| linuxmain.write("]\n") | ||
| linuxmain.write(f"tests.append(testCase(allTests_{test_file.stem}))\n") | ||
| if condition: | ||
| linuxmain.write("#endif\n") | ||
| linuxmain.write("\n") | ||
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| linuxmain.write("XCTMain(tests)") | ||
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| if __name__ == "__main__": | ||
| parser = ArgumentParser(description="Generates LinuxMain.swift for OpenCombine tests") | ||
| parser.add_argument("workdir", type=Path, nargs="?", | ||
| help="The root directory of the OpenCombine Swift package") | ||
| args = parser.parse_args() | ||
| workdir = args.workdir or Path.cwd() | ||
| generate_linuxmain(workdir) |