nullability/test/check_diagnostics_test.cc

// Part of the Crubit project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

// Tests for `checkDiagnostics()` itself.

#include "nullability/test/check_diagnostics.h"

#include "third_party/llvm/llvm-project/third-party/unittest/googletest/include/gtest/gtest-spi.h"
#include "third_party/llvm/llvm-project/third-party/unittest/googletest/include/gtest/gtest.h"

namespace clang::tidy::nullability {
namespace {

TEST(PointerNullabilityTest, NoDiagnostics) {
  EXPECT_TRUE(checkDiagnostics(R"cc(
    void target() {}
  )cc"));
}

TEST(PointerNullabilityTest, ExpectedDiagnostic) {
  EXPECT_TRUE(checkDiagnostics(R"cc(
    void target() {
      int *p = nullptr;
      *p;  // [[unsafe]]
    }
  )cc"));
}

TEST(PointerNullabilityTest, UnexpectedDiagnostic) {
  bool Result = true;
  EXPECT_NONFATAL_FAILURE(Result = checkDiagnostics(R"cc(
                            void target() {
                              1;  // [[unsafe]]
                            }
                          )cc"),
                          "Expected diagnostics but didn't find them");
  EXPECT_EQ(Result, false);
}

TEST(PointerNullabilityTest, MissingDiagnostic) {
  bool Result = true;
  EXPECT_NONFATAL_FAILURE(Result = checkDiagnostics(R"cc(
                            void target() {
                              int *p = nullptr;
                              *p;  // Missing diagnostic
                            }
                          )cc"),
                          "Found diagnostics but didn't expect them");
  EXPECT_EQ(Result, false);
}

}  // namespace
}  // namespace clang::tidy::nullability