Files
carbon-lang/toolchain/diagnostics/coverage_test.cpp
T
Jon Ross-Perkins 45e4c71703 Add a way for diagnostics to sort on more than last_byte_offset. (#6687)
The intent is that `last_byte_offset` is still the main sorting key.
Diagnostics issued normally (e.g. in an expression) will keep sorting
the same, and come before the new diagnostic sort. Diagnostics issued at
the end of a scope (e.g. `unused`) can request sorting by their start
location, and would become interleaved through that.

Choosing "on scope" because I think that's the main way we'll use this
functionality (on scope changes); can always rename later if usage
expands.

Assisted-by: Google Antigravity with Gemini 3 Flash
2026-02-04 21:13:13 +00:00

80 lines
2.8 KiB
C++

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include <gtest/gtest.h>
#include "absl/flags/flag.h"
#include "toolchain/diagnostics/kind.h"
#include "toolchain/testing/coverage_helper.h"
ABSL_FLAG(std::string, testdata_manifest, "",
"A path to a file containing repo-relative names of test files.");
namespace Carbon::Diagnostics {
namespace {
constexpr Kind Kinds[] = {
#define CARBON_DIAGNOSTIC_KIND(Name) Kind::Name,
#include "toolchain/diagnostics/kind.def"
};
constexpr Kind UntestedKinds[] = {
// These exist only for unit tests.
Kind::TestDiagnostic,
Kind::TestDiagnosticOnScope,
Kind::TestDiagnosticNote,
// Diagnosing erroneous install conditions, but test environments are
// typically correct.
Kind::CompilePreludeManifestError,
Kind::ConfigFailedToReadDigest,
Kind::ConfigFailedToSetupTarget,
Kind::DriverInstallInvalid,
// These diagnose filesystem issues that are hard to unit test.
Kind::ErrorReadingFile,
Kind::ErrorStattingFile,
Kind::FileTooLarge,
Kind::FailureBuildingRuntimes,
Kind::FailureRunningClang,
Kind::FailureRunningClangToLink,
// These aren't feasible to test with a normal testcase, but are tested in
// lex/tokenized_buffer_test.cpp.
Kind::TooManyTokens,
Kind::UnsupportedCrLineEnding,
Kind::UnsupportedLfCrLineEnding,
// This is a little long but is tested in lex/numeric_literal_test.cpp.
Kind::TooManyDigits,
// Producing an emit failure may be infeasible.
Kind::CodeGenUnableToEmit,
// TODO: This is currently hard to test because it requires building and
// importing a module, which attempts to create additional files with
// unpredictable names in the module cache, which bazel doesn't permit.
Kind::InCppModule,
// TODO: This can only fire if the first message in a diagnostic is rooted
// in a file other than the file being compiled. The language server
// currently only supports compiling one file at a time. Do one of:
// - When imports are supported, find a diagnostic whose first message isn't
// in the current file.
// - Require all diagnostics produced by compiling have their first location
// be in the file being compiled, never an import.
Kind::LanguageServerDiagnosticInWrongFile,
};
// Looks for diagnostic kinds that aren't covered by a file_test.
TEST(Coverage, Kind) {
Testing::TestKindCoverage(absl::GetFlag(FLAGS_testdata_manifest),
R"(^ *// CHECK:STDERR: .* \[(\w+)\]$)",
llvm::ArrayRef(Kinds),
llvm::ArrayRef(UntestedKinds));
}
} // namespace
} // namespace Carbon::Diagnostics