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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
// 302-Gen-Table.cpp
// Shows how to use table to run a test many times with different inputs. Lifted from examples on
// issue #850.
#include <catch2/catch_test_macros.hpp>
#include <catch2/generators/catch_generators.hpp>
#include <string>
struct TestSubject {
// this is the method we are going to test. It returns the length of the
// input string.
size_t GetLength( const std::string& input ) const { return input.size(); }
};
TEST_CASE("Table allows pre-computed test inputs and outputs", "[example][generator]") {
// do setup here as normal
TestSubject subj;
SECTION("This section is run for each row in the table") {
const auto [test_input, expected_output] =
GENERATE( table<std::string, size_t>(
{ /* In this case one of the parameters to our test case is the
* expected output, but this is not required. There could be
* multiple expected values in the table, which can have any
* (fixed) number of columns.
*/
{ "one", 3 },
{ "two", 3 },
{ "three", 5 },
{ "four", 4 } } ) );
// run the test
auto result = subj.GetLength(test_input);
// capture the input data to go with the outputs.
CAPTURE(test_input);
// check it matches the pre-calculated data
REQUIRE(result == expected_output);
} // end section
}
// Compiling and running this file will result in 4 successful assertions
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