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Apache::TestUtil 1.29

  Date Added: February 13, 2010  |  Visits: 488

Apache::TestUtil

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Apache::TestUtil Perl module contains utility functions for writing tests. SYNOPSIS use Apache::Test; use Apache::TestUtil; ok t_cmp("foo", "foo", "sanity check"); t_write_file("filename", @content); my $fh = t_open_file($filename); t_mkdir("/foo/bar"); t_rmtree("/foo/bar"); t_is_equal($a, $b); Apache::TestUtil automatically exports a number of functions useful in writing tests. All the files and directories created using the functions from this package will be automatically destroyed at the end of the program execution (via END block). You should not use these functions other than from within tests which should cleanup all the created directories and files at the end of the test. FUNCTIONS t_cmp() t_cmp($received, $expected, $comment); t_cmp() prints the values of $comment, $expected and $received. e.g.: t_cmp(1, 1, "1 == 1?"); prints: # testing : 1 == 1? # expected: 1 # received: 1 then it returns the result of comparison of the $expected and the $received variables. Usually, the return value of this function is fed directly to the ok() function, like this: ok t_cmp(1, 1, "1 == 1?"); the third argument ($comment) is optional, mostly useful for telling what the comparison is trying to do. It is valid to use undef as an expected value. Therefore: my $foo; t_cmp(undef, $foo, "undef == undef?"); will return a true value. You can compare any two data-structures with t_cmp(). Just make sure that if you pass non-scalars, you have to pass their references. The datastructures can be deeply nested. For example you can compare: t_cmp({1 => [2..3,{5..8}], 4 => [5..6]}, {1 => [2..3,{5..8}], 4 => [5..6]}, "hash of array of hashes"); You can also compare the second argument against the first as a regex. Use the qr// function in the second argument. For example: t_cmp("abcd", qr/^abc/, "regex compare"); will do: "abcd" =~ /^abc/; This function is exported by default. t_filepath_cmp() This function is used to compare two filepaths via t_cmp(). For non-Win32, it simply uses t_cmp() for the comparison, but for Win32, Win32::GetLongPathName() is invoked to convert the first two arguments to their DOS long pathname. This is useful when there is a possibility the two paths being compared are not both represented by their long or short pathname. This function is exported by default. t_debug() t_debug("testing feature foo"); t_debug("test", [1..3], 5, {a=>[1..5]}); t_debug() prints out any datastructure while prepending # at the beginning of each line, to make the debug printouts comply with Test::Harnesss requirements. This function should be always used for debug prints, since if in the future the debug printing will change (e.g. redirected into a file) your tests wont need to be changed. the special global variable $Apache::TestUtil::DEBUG_OUTPUT can be used to redirect the output from t_debug() and related calls such as t_write_file(). for example, from a server-side test you would probably need to redirect it to STDERR: sub handler { plan $r, tests => 1; local $Apache::TestUtil::DEBUG_OUTPUT = *STDERR; t_write_file(/tmp/foo, bar); ... } left to its own devices, t_debug() will collide with the standard HTTP protocol during server-side tests, resulting in a situation both confusing difficult to debug. but STDOUT is left as the default, since you probably dont want debug output under normal circumstances unless running under verbose mode. This function is exported by default. t_write_file() t_write_file($filename, @lines); t_write_file() creates a new file at $filename or overwrites the existing file with the content passed in @lines. If only the $filename is passed, an empty file will be created. If parent directories of $filename dont exist they will be automagically created. The generated file will be automatically deleted at the end of the programs execution. This function is exported by default. t_append_file() t_append_file($filename, @lines); t_append_file() is similar to t_write_file(), but it doesnt clobber existing files and appends @lines to the end of the file. If the file doesnt exist it will create it. If parent directories of $filename dont exist they will be automagically created. The generated file will be registered to be automatically deleted at the end of the programs execution, only if the file was created by t_append_file(). This function is exported by default. t_write_shell_script() Apache::TestUtil::t_write_shell_script($filename, @lines); Similar to t_write_file() but creates a portable shell/batch script. The created filename is constructed from $filename and an appropriate extension automatically selected according to the platform the code is running under. It returns the extension of the created file. t_write_perl_script() Apache::TestUtil::t_write_perl_script($filename, @lines); Similar to t_write_file() but creates a executable Perl script with correctly set shebang line. t_open_file() my $fh = t_open_file($filename); t_open_file() opens a file $filename for writing and returns the file handle to the opened file. If parent directories of $filename dont exist they will be automagically created. The generated file will be automatically deleted at the end of the programs execution. This function is exported by default. t_mkdir() t_mkdir($dirname); t_mkdir() creates a directory $dirname. The operation will fail if the parent directory doesnt exist. If parent directories of $dirname dont exist they will be automagically created. The generated directory will be automatically deleted at the end of the programs execution. This function is exported by default. t_rmtree() t_rmtree(@dirs); t_rmtree() deletes the whole directories trees passed in @dirs. This function is exported by default. t_chown() Apache::TestUtil::t_chown($file); Change ownership of $file to the tests User/Group. This function is noop on platforms where chown(2) is unsupported (e.g. Win32). t_is_equal() t_is_equal($a, $b); t_is_equal() compares any two datastructures and returns 1 if they are exactly the same, otherwise 0. The datastructures can be nested hashes, arrays, scalars, undefs or a combination of any of these. See t_cmp() for an example. If $b is a regex reference, the regex comparison $a =~ $b is performed. For example: t_is_equal($server_version, qr{^Apache}); If comparing non-scalars make sure to pass the references to the datastructures. This function is exported by default. t_server_log_error_is_expected() If the handlers execution results in an error or a warning logged to the error_log file which is expected, its a good idea to have a disclaimer printed before the error itself, so one can tell real problems with tests from expected errors. For example when testing how the package behaves under error conditions the error_log file might be loaded with errors, most of which are expected. For example if a handler is about to generate a run-time error, this function can be used as: use Apache::TestUtil; ... sub handler { my $r = shift; ... t_server_log_error_is_expected(); die "failed because ..."; } After running this handler the error_log file will include: *** The following error entry is expected and harmless *** [Tue Apr 01 14:00:21 2003] [error] failed because ... When more than one entry is expected, an optional numerical argument, indicating how many entries to expect, can be passed. For example: t_server_log_error_is_expected(2); will generate: *** The following 2 error entries are expected and harmless *** If the error is generated at compile time, the logging must be done in the BEGIN block at the very beginning of the file: BEGIN { use Apache::TestUtil; t_server_log_error_is_expected(); } use DOES_NOT_exist; After attempting to run this handler the error_log file will include: *** The following error entry is expected and harmless *** [Tue Apr 01 14:04:49 2003] [error] Cant locate "DOES_NOT_exist.pm" in @INC (@INC contains: ... Also see t_server_log_warn_is_expected() which is similar but used for warnings. This function is exported by default. t_server_log_warn_is_expected() t_server_log_warn_is_expected() generates a disclaimer for expected warnings. See the explanation for t_server_log_error_is_expected() for more details. This function is exported by default. t_client_log_error_is_expected() t_client_log_error_is_expected() generates a disclaimer for expected errors. But in contrast to t_server_log_error_is_expected() called by the client side of the script. See the explanation for t_server_log_error_is_expected() for more details. For example the following client script fails to find the handler: use Apache::Test; use Apache::TestUtil; use Apache::TestRequest qw(GET); plan tests => 1; t_client_log_error_is_expected(); my $url = "/error_document/cannot_be_found"; my $res = GET($url); ok t_cmp(404, $res->code, "test 404"); After running this test the error_log file will include an entry similar to the following snippet: *** The following error entry is expected and harmless *** [Tue Apr 01 14:02:55 2003] [error] [client 127.0.0.1] File does not exist: /tmp/test/t/htdocs/error When more than one entry is expected, an optional numerical argument, indicating how many entries to expect, can be passed. For example: t_client_log_error_is_expected(2); will generate: *** The following 2 error entries are expected and harmless *** This function is exported by default. t_client_log_warn_is_expected() t_client_log_warn_is_expected() generates a disclaimer for expected warnings on the client side. See the explanation for t_client_log_error_is_expected() for more details. This function is exported by default. t_catfile(a, b, c) This function is essentially File::Spec->catfile, but on Win32 will use Win32::GetLongpathName() to convert the result to a long path name (if the result is an absolute file). The function is not exported by default. t_catfile_apache(a, b, c) This function is essentially File::Spec::Unix->catfile, but on Win32 will use Win32::GetLongpathName() to convert the result to a long path name (if the result is an absolute file). It is useful when comparing something to that returned by Apache, which uses a Unix-style specification with forward slashes for directory separators. The function is not exported by default. t_start_error_log_watch(), t_finish_error_log_watch() This pair of functions provides an easy interface for checking the presence or absense of any particular message or messages in the httpd error_log that were generated by the httpd daemon as part of a test suite. It is likely, that you should proceed this with a call to one of the t_*_is_expected() functions. t_start_error_log_watch(); do_it; ok grep {...} t_finish_error_log_watch().

Requirements: No special requirements
Platforms: Linux
Keyword: By Default End Of Expected File For Example For More Details Log File Testutil Testutil Perl Tue Apr Utility Functions Will Be
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