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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_AUTOFILL_CORE_COMMON_TEST_MATCHERS_H_
#define COMPONENTS_AUTOFILL_CORE_COMMON_TEST_MATCHERS_H_
#include <tuple>
#include "base/check.h"
#include "base/location.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace autofill::test {
// Stores the address of the `I`th argument in `*ptr`.
// See LazyRef() for a usage example.
template <size_t I = 0, typename T>
auto SaveArgPtr(T** ptr) {
return [ptr](auto&&... args) { *ptr = &std::get<I>(std::tie(args...)); };
}
// `LazyRef(x)` behaves like `::testing::Ref(x)` but dereferences `x` at match
// time.
//
// Usage:
// MockFunction<void(Foo&)> fun;
// {
// Foo* foo_ptr = nullptr;
// EXPECT_CALL(fun, Call).WillOnce(SaveArgPtr(&foo_ptr));
// EXPECT_CALL(fun, Call(LazyRef(foo_ptr)));
// }
// Foo foo;
// fun.Call(foo);
// fun.Call(foo);
template <typename T>
auto LazyRef(T*& ptr, base::Location loc = FROM_HERE) {
return ::testing::Truly([&ptr, loc](const T& actual) {
CHECK(ptr) << "LazyRef is unbound in " << loc.ToString();
return std::addressof(actual) == ptr;
});
}
} // namespace autofill::test
#endif // COMPONENTS_AUTOFILL_CORE_COMMON_TEST_MATCHERS_H_
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