catch2/tests/SelfTest/IntrospectiveTests/TestCaseInfoHasher.tests.cpp

//              Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
//   (See accompanying file LICENSE_1_0.txt or copy at
//        https://www.boost.org/LICENSE_1_0.txt)

// SPDX-License-Identifier: BSL-1.0

#include <catch2/catch_test_macros.hpp>
#include <catch2/catch_test_case_info.hpp>
#include <catch2/internal/catch_test_case_info_hasher.hpp>

static constexpr Catch::SourceLineInfo dummySourceLineInfo = CATCH_INTERNAL_LINEINFO;

TEST_CASE( "TestCaseInfoHasher produces equal hashes." ) {
    SECTION( "class names and names and tags are equal." ) {
        Catch::TestCaseInfo testCase1("", {"name", "[.magic-tag1]"}, dummySourceLineInfo);
        Catch::TestCaseInfo testCase2("", {"name", "[.magic-tag1]"}, dummySourceLineInfo);

        Catch::TestCaseInfoHasher hasherWithCustomSeed(123456789u);
        CHECK(hasherWithCustomSeed(testCase1) == hasherWithCustomSeed(testCase2));
    }
}

TEST_CASE( "TestCaseInfoHasher produces different hashes." ) {
    SECTION( "class names are equal, names are equal but tags are different." ) {
        Catch::TestCaseInfo testCase1("", {"name", "[.magic-tag1]"}, dummySourceLineInfo);
        Catch::TestCaseInfo testCase2("", {"name", "[.magic-tag2]"}, dummySourceLineInfo);

        Catch::TestCaseInfoHasher hasherWithCustomSeed(123456789u);
        CHECK(hasherWithCustomSeed(testCase1) != hasherWithCustomSeed(testCase2));
    }

    SECTION( "class names are equal, tags are equal but names are different" ) {
        Catch::TestCaseInfo testCase1("", {"name1", "[.magic-tag]"}, dummySourceLineInfo);
        Catch::TestCaseInfo testCase2("", {"name2", "[.magic-tag]"}, dummySourceLineInfo);

        Catch::TestCaseInfoHasher hasherWithCustomSeed(123456789u);
        CHECK(hasherWithCustomSeed(testCase1) != hasherWithCustomSeed(testCase2));
    }

    SECTION( "names are equal, tags are equal but class names are different" ) {
        Catch::TestCaseInfo testCase1("class1", {"name", "[.magic-tag]"}, dummySourceLineInfo);
        Catch::TestCaseInfo testCase2("class2", {"name", "[.magic-tag]"}, dummySourceLineInfo);

        Catch::TestCaseInfoHasher hasherWithCustomSeed(123456789u);
        CHECK(hasherWithCustomSeed(testCase1) != hasherWithCustomSeed(testCase2));
    }

    SECTION( "class names and names and tags are equal but hashers are seeded differently." ) {
        Catch::TestCaseInfo testCase1("", {"name", "[.magic-tag1]"}, dummySourceLineInfo);
        Catch::TestCaseInfo testCase2("", {"name", "[.magic-tag1]"}, dummySourceLineInfo);

        Catch::TestCaseInfoHasher h1(14695981039346656037u);
        Catch::TestCaseInfoHasher h2(14695981039346656038u);

        CHECK(h1(testCase1) != h2(testCase2));
    }
}