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More tests for MapGenerator

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This commit is contained in:
Martin Hořeňovský
2026-02-15 21:53:10 +01:00
parent edfed6c04e
commit 56024c04e4
18 changed files with 671 additions and 153 deletions
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tests/SelfTest/IntrospectiveTests/GeneratorsImpl.tests.cpp
+53 -15
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@@ -708,25 +708,46 @@ TEST_CASE("MapGenerator can be skipped forward efficiently",
return i;
};
MapGenerator<int, int, decltype(map_func)> map_generator( map_func, values( { 0, 1, 2, 3, 4, 5, 6 } ) );
REQUIRE( map_calls == 0 );
const int map_calls_1 = map_calls;
SECTION( "via calls to next()" ) {
MapGenerator<int, int, decltype( map_func )> map_generator(
map_func, values( { 0, 1, 2, 3, 4, 5, 6 } ) );
REQUIRE( map_calls == 0 );
map_generator.skipToNthElement( 4 );
REQUIRE( map_generator.get() == 4 );
REQUIRE( map_calls == map_calls_1 + 1 );
map_generator.next();
map_generator.next();
map_generator.next();
REQUIRE( map_calls == 0 );
REQUIRE( map_generator.get() == 3 );
REQUIRE( map_calls == 1 );
REQUIRE( map_generator.get() == 3 );
REQUIRE( map_calls == 1 );
map_generator.skipToNthElement( 4 );
REQUIRE( map_generator.get() == 4 );
REQUIRE( map_calls == map_calls_1 + 1 );
map_generator.next();
REQUIRE( map_calls == 1 );
}
SECTION("via calls to skipToNthElement()") {
MapGenerator<int, int, decltype( map_func )> map_generator(
map_func, values( { 0, 1, 2, 3, 4, 5, 6 } ) );
REQUIRE( map_calls == 0 );
const int map_calls_2 = map_calls;
map_generator.skipToNthElement( 6 );
REQUIRE( map_generator.get() == 6 );
REQUIRE( map_calls == map_calls_2 + 1 );
map_generator.skipToNthElement( 3 );
map_generator.skipToNthElement( 4 );
REQUIRE( map_calls == 0 );
REQUIRE( map_generator.get() == 4 );
REQUIRE( map_calls == 1 );
REQUIRE_THROWS( map_generator.skipToNthElement( 7 ) );
REQUIRE( map_calls == map_calls_2 + 1 );
map_generator.skipToNthElement( 4 );
REQUIRE( map_generator.get() == 4 );
REQUIRE( map_calls == 1 );
map_generator.skipToNthElement( 6 );
REQUIRE( map_calls == 1 );
REQUIRE( map_generator.get() == 6 );
REQUIRE( map_calls == 2 );
REQUIRE_THROWS( map_generator.skipToNthElement( 7 ) );
REQUIRE( map_calls == 2 );
}
}
TEST_CASE( "Generator adapters properly handle isFinite",
@@ -791,3 +812,20 @@ TEMPLATE_TEST_CASE( "RandomGenerator reports itself as infinite",
long double) {
REQUIRE_FALSE( Catch::Generators::random( TestType{ 0 }, TestType{ 100 } ).isFinite() );
}
namespace {
struct NotDefaultConstructible {
int m_i;
explicit NotDefaultConstructible( int i ): m_i( i ){}
};
}
TEST_CASE( "MapGenerator can handle not default constructible types",
"[generators][map]" ) {
using namespace Catch::Generators;
auto map_generator = map( []( int i ) { return NotDefaultConstructible( i ); }, values({1, 2, 3}));
REQUIRE( map_generator.get().m_i == 1 );
REQUIRE( map_generator.next() );
REQUIRE( map_generator.next() );
REQUIRE( map_generator.get().m_i == 3 );
}