如何在测试中简单地将信息发送到标准输出? [英] How can simply send info to stdout in a Test?

问题描述

似乎只是将 say、print 等放入 .t 中是行不通的.输出是隐藏的.因此，当使用 Test::More 和 Test::Tester 时，我如何简单地打印一些东西?我想要这个，所以我可以在确定如何测试它的同时玩一些代码.注意:如果将其发送到 stderr 或仅使用详细可见，则可以.我还使用 diag 进行了干燥，但这似乎在测试中的任何地方都不起作用.

It appears that simply putting a say, print, etc into a .t doesn't work. The output is hidden. So when using Test::More and Test::Tester how can I simply print something? I want this so I can play with some code while determining how to test it. note: it's ok if it's sent to stderr or only viewable using verbose. Also I dried using diag but that didn't appear to work just anywhere in the test.

推荐答案

如果你直接运行测试脚本，你会看到 print 的输出——测试只是 Perl 代码.但是，如果您使用工具运行测试，您在输出中看到的内容将由工具决定，尤其是其详细程度，以及您是打印到 STDOUT 还是 STDERR.

If you run a test script directly, you will see the output of print -- tests are just Perl code. However, if you run your tests using a harness, what you see in the output will be determined by the harness, especially its verbosity level, and by whether you print to STDOUT or STDERR.

有关在测试中打印消息的另一种方式，请参阅 Diagnostics>测试::更多，特别是:

For another way to print messages within tests, see Diagnostics in the documentation for Test::More, notably:

diag(...);
note(...);

使用这样的脚本进行实验将很快说明事情是如何工作的:

Experimenting with a script like this will quickly illustrate how things work:

# Example usages:
#     perl     some_test.t   # We see everything in output.
#     prove    some_test.t   # We see only diag() and STDERR.
#     prove -v some_test.t   # Everything again.

# In some_test.t
use strict;
use warnings;
use Test::More;

pass;

diag("diag()");
note("note()");
print        "STDOUT\n";
print STDERR "STDERR\n";

done_testing;

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