1Test::Command::Simple(3U)ser Contributed Perl DocumentatiToenst::Command::Simple(3)
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6 Test::Command::Simple - Test external commands (nearly) as easily as
7 loaded modules.
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10 Version 0.05
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13 use Test::Command::Simple;
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15 run('echo', 'has this output'); # only tests that the command can be started, not checking rc
16 is(rc,0,'Returned successfully')
17 like(stdout,qr/has this output/,'Testing stdout');
18 is(length stderr, 0,'No stderr');
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21 This test module is intended to simplify testing of external commands.
22 It does so by running the command under IPC::Open3, closing the stdin
23 immediately, and reading everything from the command's stdout and
24 stderr. It then makes the output available to be tested.
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26 It is not (yet?) as feature-rich as Test::Cmd, but I think the
27 interface to this is much simpler. Tests also plug directly into the
28 Test::Builder framework, which plays nice with Test::More.
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30 As compared to Test::Command, this module is simpler, relying on the
31 user to feed rc, stdout, and stderr to the appropriate other tests,
32 presumably in Test::More, but not necessarily. This makes it possible,
33 for example, to test line 3 of the output:
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35 my (undef, undef, $line) = split /\r?\n/, stdout;
36 is($line, 'This is the third line', 'Test the third line');
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38 While this is possible to do with Test::Command's stdout_like, some
39 regex's can get very awkward, and it becomes better to do this in
40 multiple steps.
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42 Also, Test::Command saves stdout and stderr to files. That has an
43 advantage when you're saving a lot of text. However, this module
44 prefers to slurp everything in using IPC::Open3, IO::Select, and
45 sysread. Most of the time, commands being tested do not produce
46 significant amounts of output, so there becomes no reason to use
47 temporary files and involve the disk at all.
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50 run
51 Runs the given command. It will return when the command is done.
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53 This will also reinitialise all of the states for stdout, stderr, and
54 rc. If you need to keep the values of a previous run() after a later
55 one, you will need to store it. This should be mostly pretty rare.
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57 Counts as one test: whether the IPC::Open3 call to open3 succeeded.
58 That is not returned in a meaningful way to the user, though. To check
59 if that's the case for purposes of SKIPping, rc will be set to -1.
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61 stdout
62 Returns the last run's stdout
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64 stderr
65 Returns the last run's stderr
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67 rc
68 Returns the last run's full $?, suitable for passing to POSIX's
69 :sys_wait_h macros (WIFEXITED, WEXITSTATUS, etc.)
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71 exit_status
72 Returns the exit status of the last run
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74 run_ok
75 Shortcut for checking that the return from a command is 0. Will still
76 set stdout and stderr for further testing.
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78 If the first parameter is an integer 0-255, then that is the expected
79 return code instead. Remember: $? has both a return code (0-255) and a
80 reason for exit embedded. This function must make the assumption that
81 you want a "normal" exit only. If any signal is given, this will treat
82 that as a failure.
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84 Note that this becomes three tests: one that IPC::Open3 could create
85 the subprocess with the command, the next is the test that the process
86 exited normally, and the last is the test of the rc.
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89 Darin McBride, "<dmcbride at cpan.org>"
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92 Please report any bugs or feature requests to "bug-test-command at
93 rt.cpan.org", or through the web interface at
94 <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Command-Simple>.
95 I will be notified, and then you'll automatically be notified of
96 progress on your bug as I make changes.
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99 You can find documentation for this module with the perldoc command.
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101 perldoc Test::Command::Simple
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103 You can also look for information at:
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105 · RT: CPAN's request tracker
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107 <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Test-Command-Simple>
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109 · AnnoCPAN: Annotated CPAN documentation
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111 <http://annocpan.org/dist/Test-Command-Simple>
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113 · CPAN Ratings
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115 <http://cpanratings.perl.org/d/Test-Command-Simple>
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117 · Search CPAN
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119 <http://search.cpan.org/dist/Test-Command-Simple/>
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123 Copyright 2010 Darin McBride.
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125 This program is free software; you can redistribute it and/or modify it
126 under the terms of either: the GNU General Public License as published
127 by the Free Software Foundation; or the Artistic License.
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129 See http://dev.perl.org/licenses/ for more information.
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133perl v5.32.0 2020-07-28 Test::Command::Simple(3)