c++ - 如果所有部分都失败，Catch2 将再次运行测试

Question

我有以下使用最新 (2.4.0) 版本的 Catch2 运行的代码:

#include "catch.hpp"
#include <iostream>
TEST_CASE("Test") {
    int x = 0;
    SECTION("A") {
            std::cout << "A";
            ++x;
            REQUIRE(x == 1);
    }
    SECTION("B") {
            std::cout << "B";
            ++x;
            REQUIRE(x == 1);
    }
    std::cout << "X\n";
    REQUIRE(x == 1);
}

如果我运行它，一切都按预期工作，我得到:

AX
BX
=================================================================
All tests passed (4 assertions in 1 test case)

很明显，测试用例运行了两次，每个部分运行一次。

如果我更改其中一个部分中的断言，例如 REQUIRE(x == 0)，同样，一切都按预期进行，Catch2 运行每个部分一次并告诉我第一个失败.但是，如果我在 both 部分中将断言更改为 REQUIRE(x == 0)，结果会令人困惑(我已将其略微缩短):

A
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.out is a Catch v2.4.0 host application.
Run with -? for options
---------------------------------------------------------------------
Test
  A
---------------------------------------------------------------------
test.cpp:10: FAILED:
  REQUIRE( x == 0 )
with expansion:
  1 == 0
B--------------------------------------------------------------------
Test
  B
---------------------------------------------------------------------
test.cpp:15: FAILED:
  REQUIRE( x == 0 )
with expansion:
  1 == 0

X
---------------------------------------------------------------------
Test
---------------------------------------------------------------------
test.cpp:19: FAILED:
  REQUIRE( x == 1 )
with expansion:
  0 == 1
=====================================================================
test cases: 1 | 1 failed
assertions: 3 | 3 failed

测试显然运行了三次，最后一次绕过了这两个部分。这种行为是预期的吗？我曾尝试查看 Catch2 文档，但找不到任何相关内容。

Answer 1

来自docs :

One leaf section is executed on each run through a TEST_CASE. The other sections are skipped. Next time through the next section is executed, and so on until no new sections are encountered.

所以有问题的测试必须运行 3 次。