mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Chandler Carruth
529dcfcfec
I wasn't sure I'd be able to really test this code path, but then I remembered that Bazel has a whole platform for running Bazel from within an integration test, and it turns out to work brilliantly. It even lets us point the child Bazel invocations to the just-built toolchain. This should both give us confidence that we don't accidentally hit a Bazel incompatibility with the example project, and it should ensure that if something about the installed toolchain would stop being compatible with building via Bazel we'll catch it early. The tests are integration tests and so a bit slow: 15s or so. But `//examples/...` is already pretty expensive and no other testing patterns are impacted.
61 lines
1.8 KiB
Python
Executable File
61 lines
1.8 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Checks various LLVM tool symlinks behave as expected."""
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__copyright__ = """
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Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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Exceptions. See /LICENSE for license information.
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SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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"""
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import os
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import sys
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import unittest
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from bazel_tools.tools.python.runfiles import runfiles
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from bazel_integration_test.py import test_base
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class BazelExampleTest(test_base.TestBase):
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def setUp(self) -> None:
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test_base.TestBase.setUp(self)
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self.runfiles = runfiles.Create()
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self.install_module = self.runfiles.Rlocation(
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"carbon/toolchain/install/prefix/lib/carbon"
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)
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self.startup_flags = [
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"--ignore_all_rc_files",
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"--batch",
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]
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self.flags = [
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f"--override_module=carbon_toolchain={self.install_module}"
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]
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def log_lines(self, lines: list[str]) -> None:
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for line in lines:
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print(line, file=sys.stderr)
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def test_compile_lib(self) -> None:
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# TODO: Can remove this if we can make linking a binary sufficiently
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# efficient.
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exit_code, stdout, stderr = self.RunBazel(
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self.startup_flags + ["build"] + self.flags + ["//:example_lib"]
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)
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self.log_lines(stderr)
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self.AssertExitCode(exit_code, 0, stderr)
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@unittest.skipUnless(
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"CARBON_BAZEL_TEST_FULL" in os.environ,
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"Skipping expensive test step for minimal testing",
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)
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def test_run(self) -> None:
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exit_code, stdout, stderr = self.RunBazel(
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self.startup_flags + ["run"] + self.flags + ["//:example"]
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)
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self.log_lines(stderr)
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self.AssertExitCode(exit_code, 0, stderr)
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self.assertEqual(stdout, ["Hello World!"])
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if __name__ == "__main__":
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unittest.main()
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