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https://github.com/carbon-language/carbon-lang.git
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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// 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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#include "diagnostics/diagnostic_emitter.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/FormatVariadic.h"
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namespace Carbon {
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namespace {
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using ::testing::ElementsAre;
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using ::testing::Eq;
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struct FakeDiagnostic {
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static constexpr llvm::StringLiteral ShortName = "fake-diagnostic";
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// TODO: consider ways to put the Message into `format` to allow dynamic
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// selection of the message.
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static constexpr llvm::StringLiteral Message = "{0}";
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struct Substitutions {
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std::string message;
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};
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static auto Format(const Substitutions& substitutions) -> std::string {
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// Work around a bug in Clang's unused const variable warning by marking it
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// used here with a no-op.
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static_cast<void>(ShortName);
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return llvm::formatv(Message.data(), substitutions.message).str();
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}
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};
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TEST(DiagTest, EmitErrors) {
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std::vector<std::string> reported;
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DiagnosticEmitter emitter([&](const Diagnostic& diagnostic) {
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EXPECT_THAT(diagnostic.short_name, Eq("fake-diagnostic"));
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reported.push_back(diagnostic.message);
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});
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emitter.EmitError<FakeDiagnostic>({.message = "M1"});
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emitter.EmitError<FakeDiagnostic>({.message = "M2"});
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EXPECT_THAT(reported, ElementsAre("M1", "M2"));
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}
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TEST(DiagTest, EmitWarnings) {
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std::vector<std::string> reported;
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DiagnosticEmitter emitter([&](const Diagnostic& diagnostic) {
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EXPECT_THAT(diagnostic.short_name, Eq("fake-diagnostic"));
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reported.push_back(diagnostic.message);
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});
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emitter.EmitWarningIf<FakeDiagnostic>(
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[](FakeDiagnostic::Substitutions& diagnostic) {
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diagnostic.message = "M1";
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return true;
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});
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emitter.EmitWarningIf<FakeDiagnostic>(
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[](FakeDiagnostic::Substitutions& diagnostic) {
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diagnostic.message = "M2";
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return false;
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});
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emitter.EmitWarningIf<FakeDiagnostic>(
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[](FakeDiagnostic::Substitutions& diagnostic) {
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diagnostic.message = "M3";
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return true;
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});
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EXPECT_THAT(reported, ElementsAre("M1", "M3"));
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}
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} // namespace
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} // namespace Carbon
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