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#pragma once
#include <util/generic/string.h>
#include <gmock/gmock.h>
namespace NGTest {
namespace NDetail {
[[nodiscard]] bool MatchOrUpdateGolden(std::string_view actualContent, const TString& goldenFilename);
}
/**
* Matches a string or std::vector<char> equal to the specified file content.
* The file must be brought to the test using macro DATA in ya.make.
*
* The matcher is able to update the file by the actual content during
* the special test run with the argument '--test-param GTEST_UPDATE_GOLDEN=1'.
* Any change in such files should be added to VCS manually.
*
* The matcher should not be used for a binary data. Use it for a content whose
* diff will be visual during a code review: text, config, image.
*
* Example:
* ```
* TEST(Suite, Name) {
* std::string data = RenderSomeTextData();
* EXPECT_THAT(data, NGTest::GoldenFileEq(SRC_("golden/data.txt")));
* }
* ```
*/
MATCHER_P(GoldenFileEq, filename, "")
{
if (!NDetail::MatchOrUpdateGolden(std::string_view(arg.data(), arg.size()), TString(filename))) {
*result_listener
<< "\nCall `ya test --test-param GTEST_UPDATE_GOLDEN=1` to update the golden file";
return false;
}
return true;
}
}
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