Index: head/contrib/atf/atf-c/atf-c-api.3 =================================================================== --- head/contrib/atf/atf-c/atf-c-api.3 (revision 314801) +++ head/contrib/atf/atf-c/atf-c-api.3 (revision 314802) @@ -1,772 +1,772 @@ .\" .\" Automated Testing Framework (atf) .\" .\" Copyright (c) 2008 The NetBSD Foundation, Inc. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND .\" CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, .\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY .\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE .\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER .\" IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR .\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN .\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd March 6, 2017 .Dt ATF-C-API 3 .Os .Sh NAME .Nm atf-c-api , .Nm ATF_CHECK , .Nm ATF_CHECK_MSG , .Nm ATF_CHECK_EQ , .Nm ATF_CHECK_EQ_MSG , .Nm ATF_CHECK_MATCH , .Nm ATF_CHECK_MATCH_MSG , .Nm ATF_CHECK_STREQ , .Nm ATF_CHECK_STREQ_MSG , .Nm ATF_CHECK_ERRNO , .Nm ATF_REQUIRE , .Nm ATF_REQUIRE_MSG , .Nm ATF_REQUIRE_EQ , .Nm ATF_REQUIRE_EQ_MSG , .Nm ATF_REQUIRE_MATCH , .Nm ATF_REQUIRE_MATCH_MSG , .Nm ATF_REQUIRE_STREQ , .Nm ATF_REQUIRE_STREQ_MSG , .Nm ATF_REQUIRE_ERRNO , .Nm ATF_TC , .Nm ATF_TC_BODY , .Nm ATF_TC_BODY_NAME , .Nm ATF_TC_CLEANUP , .Nm ATF_TC_CLEANUP_NAME , .Nm ATF_TC_HEAD , .Nm ATF_TC_HEAD_NAME , .Nm ATF_TC_NAME , .Nm ATF_TC_WITH_CLEANUP , .Nm ATF_TC_WITHOUT_HEAD , .Nm ATF_TP_ADD_TC , .Nm ATF_TP_ADD_TCS , .Nm atf_tc_get_config_var , .Nm atf_tc_get_config_var_wd , .Nm atf_tc_get_config_var_as_bool , .Nm atf_tc_get_config_var_as_bool_wd , .Nm atf_tc_get_config_var_as_long , .Nm atf_tc_get_config_var_as_long_wd , .Nm atf_no_error , .Nm atf_tc_expect_death , .Nm atf_tc_expect_exit , .Nm atf_tc_expect_fail , .Nm atf_tc_expect_pass , .Nm atf_tc_expect_signal , .Nm atf_tc_expect_timeout , .Nm atf_tc_fail , .Nm atf_tc_fail_nonfatal , .Nm atf_tc_pass , .Nm atf_tc_skip , .Nm atf_utils_cat_file , .Nm atf_utils_compare_file , .Nm atf_utils_copy_file , .Nm atf_utils_create_file , .Nm atf_utils_file_exists , .Nm atf_utils_fork , .Nm atf_utils_free_charpp , .Nm atf_utils_grep_file , .Nm atf_utils_grep_string , .Nm atf_utils_readline , .Nm atf_utils_redirect , .Nm atf_utils_wait .Nd C API to write ATF-based test programs .Sh SYNOPSIS .In atf-c.h .Fn ATF_CHECK "expression" .Fn ATF_CHECK_MSG "expression" "fail_msg_fmt" ... .Fn ATF_CHECK_EQ "expression_1" "expression_2" .Fn ATF_CHECK_EQ_MSG "expression_1" "expression_2" "fail_msg_fmt" ... .Fn ATF_CHECK_MATCH "regexp" "string" .Fn ATF_CHECK_MATCH_MSG "regexp" "string" "fail_msg_fmt" ... .Fn ATF_CHECK_STREQ "string_1" "string_2" .Fn ATF_CHECK_STREQ_MSG "string_1" "string_2" "fail_msg_fmt" ... .Fn ATF_CHECK_ERRNO "exp_errno" "bool_expression" .Fn ATF_REQUIRE "expression" .Fn ATF_REQUIRE_MSG "expression" "fail_msg_fmt" ... .Fn ATF_REQUIRE_EQ "expression_1" "expression_2" .Fn ATF_REQUIRE_EQ_MSG "expression_1" "expression_2" "fail_msg_fmt" ... .Fn ATF_REQUIRE_MATCH "regexp" "string" .Fn ATF_REQUIRE_MATCH_MSG "regexp" "string" "fail_msg_fmt" ... .Fn ATF_REQUIRE_STREQ "string_1" "string_2" .Fn ATF_REQUIRE_STREQ_MSG "string_1" "string_2" "fail_msg_fmt" ... .Fn ATF_REQUIRE_ERRNO "exp_errno" "bool_expression" .Fn ATF_TC "name" .Fn ATF_TC_BODY "name" "tc" .Fn ATF_TC_BODY_NAME "name" .Fn ATF_TC_CLEANUP "name" "tc" .Fn ATF_TC_CLEANUP_NAME "name" .Fn ATF_TC_HEAD "name" "tc" .Fn ATF_TC_HEAD_NAME "name" .Fn ATF_TC_NAME "name" .Fn ATF_TC_WITH_CLEANUP "name" .Fn ATF_TC_WITHOUT_HEAD "name" .Fn ATF_TP_ADD_TC "tp_name" "tc_name" .Fn ATF_TP_ADD_TCS "tp_name" .Fn atf_tc_get_config_var "tc" "varname" .Fn atf_tc_get_config_var_wd "tc" "variable_name" "default_value" .Fn atf_tc_get_config_var_as_bool "tc" "variable_name" .Fn atf_tc_get_config_var_as_bool_wd "tc" "variable_name" "default_value" .Fn atf_tc_get_config_var_as_long "tc" "variable_name" .Fn atf_tc_get_config_var_as_long_wd "tc" "variable_name" "default_value" .Fn atf_no_error .Fn atf_tc_expect_death "reason" "..." .Fn atf_tc_expect_exit "exitcode" "reason" "..." .Fn atf_tc_expect_fail "reason" "..." .Fn atf_tc_expect_pass .Fn atf_tc_expect_signal "signo" "reason" "..." .Fn atf_tc_expect_timeout "reason" "..." .Fn atf_tc_fail "reason" .Fn atf_tc_fail_nonfatal "reason" .Fn atf_tc_pass .Fn atf_tc_skip "reason" .Ft void .Fo atf_utils_cat_file .Fa "const char *file" .Fa "const char *prefix" .Fc .Ft bool .Fo atf_utils_compare_file .Fa "const char *file" .Fa "const char *contents" .Fc .Ft void .Fo atf_utils_copy_file .Fa "const char *source" .Fa "const char *destination" .Fc .Ft void .Fo atf_utils_create_file .Fa "const char *file" .Fa "const char *contents" .Fa "..." .Fc .Ft void .Fo atf_utils_file_exists .Fa "const char *file" .Fc .Ft pid_t .Fo atf_utils_fork .Fa "void" .Fc .Ft void .Fo atf_utils_free_charpp .Fa "char **argv" .Fc .Ft bool .Fo atf_utils_grep_file .Fa "const char *regexp" .Fa "const char *file" .Fa "..." .Fc .Ft bool .Fo atf_utils_grep_string .Fa "const char *regexp" .Fa "const char *str" .Fa "..." .Fc .Ft char * .Fo atf_utils_readline .Fa "int fd" .Fc .Ft void .Fo atf_utils_redirect .Fa "const int fd" .Fa "const char *file" .Fc .Ft void .Fo atf_utils_wait .Fa "const pid_t pid" .Fa "const int expected_exit_status" .Fa "const char *expected_stdout" .Fa "const char *expected_stderr" .Fc .Sh DESCRIPTION ATF provides a C programming interface to implement test programs. C-based test programs follow this template: .Bd -literal -offset indent .Ns ... C-specific includes go here ... #include ATF_TC(tc1); ATF_TC_HEAD(tc1, tc) { ... first test case's header ... } ATF_TC_BODY(tc1, tc) { ... first test case's body ... } ATF_TC_WITH_CLEANUP(tc2); ATF_TC_HEAD(tc2, tc) { ... second test case's header ... } ATF_TC_BODY(tc2, tc) { ... second test case's body ... } ATF_TC_CLEANUP(tc2, tc) { ... second test case's cleanup ... } ATF_TC_WITHOUT_HEAD(tc3); ATF_TC_BODY(tc3, tc) { ... third test case's body ... } .Ns ... additional test cases ... ATF_TP_ADD_TCS(tp) { ATF_TP_ADD_TC(tp, tc1); ATF_TP_ADD_TC(tp, tc2); ATF_TP_ADD_TC(tp, tc3); ... add additional test cases ... return atf_no_error(); } .Ed .Ss Definition of test cases Test cases have an identifier and are composed of three different parts: the header, the body and an optional cleanup routine, all of which are described in .Xr atf-test-case 4 . To define test cases, one can use the .Fn ATF_TC , .Fn ATF_TC_WITH_CLEANUP or the .Fn ATF_TC_WITHOUT_HEAD -macros, which take a single parameter specifiying the test case's name. +macros, which take a single parameter specifying the test case's name. .Fn ATF_TC , requires to define a head and a body for the test case, .Fn ATF_TC_WITH_CLEANUP requires to define a head, a body and a cleanup for the test case and .Fn ATF_TC_WITHOUT_HEAD requires only a body for the test case. It is important to note that these .Em do not set the test case up for execution when the program is run. In order to do so, a later registration is needed with the .Fn ATF_TP_ADD_TC macro detailed in .Sx Program initialization . .Pp Later on, one must define the three parts of the body by means of three functions. Their headers are given by the .Fn ATF_TC_HEAD , .Fn ATF_TC_BODY and .Fn ATF_TC_CLEANUP macros, all of which take the test case name provided to the .Fn ATF_TC .Fn ATF_TC_WITH_CLEANUP , or .Fn ATF_TC_WITHOUT_HEAD macros and the name of the variable that will hold a pointer to the test case data. Following each of these, a block of code is expected, surrounded by the opening and closing brackets. .Ss Program initialization The library provides a way to easily define the test program's .Fn main function. You should never define one on your own, but rely on the library to do it for you. This is done by using the .Fn ATF_TP_ADD_TCS macro, which is passed the name of the object that will hold the test -cases; i.e. the test program instance. +cases, i.e., the test program instance. This name can be whatever you want as long as it is a valid variable identifier. .Pp After the macro, you are supposed to provide the body of a function, which should only use the .Fn ATF_TP_ADD_TC macro to register the test cases the test program will execute and return a success error code. The first parameter of this macro matches the name you provided in the former call. The success status can be returned using the .Fn atf_no_error function. .Ss Header definitions The test case's header can define the meta-data by using the .Fn atf_tc_set_md_var method, which takes three parameters: the first one points to the test case data, the second one specifies the meta-data variable to be set and the third one specifies its value. Both of them are strings. .Ss Configuration variables The test case has read-only access to the current configuration variables by means of the .Ft bool .Fn atf_tc_has_config_var , .Ft const char * .Fn atf_tc_get_config_var , .Ft const char * .Fn atf_tc_get_config_var_wd , .Ft bool .Fn atf_tc_get_config_var_as_bool , .Ft bool .Fn atf_tc_get_config_var_as_bool_wd , .Ft long .Fn atf_tc_get_config_var_as_long , and the .Ft long .Fn atf_tc_get_config_var_as_long_wd functions, which can be called in any of the three parts of a test case. .Pp The .Sq _wd variants take a default value for the variable which is returned if the variable is not defined. The other functions without the .Sq _wd suffix .Em require the variable to be defined. .Ss Access to the source directory It is possible to get the path to the test case's source directory from any of its three components by querying the .Sq srcdir configuration variable. .Ss Requiring programs Aside from the .Va require.progs meta-data variable available in the header only, one can also check for additional programs in the test case's body by using the .Fn atf_tc_require_prog function, which takes the base name or full path of a single binary. Relative paths are forbidden. If it is not found, the test case will be automatically skipped. .Ss Test case finalization The test case finalizes either when the body reaches its end, at which point the test is assumed to have .Em passed , unless any non-fatal errors were raised using .Fn atf_tc_fail_nonfatal , or at any explicit call to .Fn atf_tc_pass , .Fn atf_tc_fail or .Fn atf_tc_skip . These three functions terminate the execution of the test case immediately. The cleanup routine will be processed afterwards in a completely automated way, regardless of the test case's termination reason. .Pp .Fn atf_tc_pass does not take any parameters. .Fn atf_tc_fail , .Fn atf_tc_fail_nonfatal and .Fn atf_tc_skip take a format string and a variable list of parameters, which describe, in a user-friendly manner, why the test case failed or was skipped, respectively. It is very important to provide a clear error message in both cases so that the user can quickly know why the test did not pass. .Ss Expectations Everything explained in the previous section changes when the test case expectations are redefined by the programmer. .Pp Each test case has an internal state called .Sq expect that describes what the test case expectations are at any point in time. The value of this property can change during execution by any of: .Bl -tag -width indent .It Fn atf_tc_expect_death "reason" "..." Expects the test case to exit prematurely regardless of the nature of the exit. .It Fn atf_tc_expect_exit "exitcode" "reason" "..." Expects the test case to exit cleanly. If .Va exitcode is not .Sq -1 , the runtime engine will validate that the exit code of the test case matches the one provided in this call. Otherwise, the exact value will be ignored. .It Fn atf_tc_expect_fail "reason" "..." Any failure (be it fatal or non-fatal) raised in this mode is recorded. However, such failures do not report the test case as failed; instead, the test case finalizes cleanly and is reported as .Sq expected failure ; this report includes the provided .Fa reason as part of it. If no error is raised while running in this mode, then the test case is reported as .Sq failed . .Pp This mode is useful to reproduce actual known bugs in tests. Whenever the developer fixes the bug later on, the test case will start reporting a failure, signaling the developer that the test case must be adjusted to the new conditions. In this situation, it is useful, for example, to set .Fa reason as the bug number for tracking purposes. .It Fn atf_tc_expect_pass This is the normal mode of execution. In this mode, any failure is reported as such to the user and the test case is marked as .Sq failed . .It Fn atf_tc_expect_signal "signo" "reason" "..." Expects the test case to terminate due to the reception of a signal. If .Va signo is not .Sq -1 , the runtime engine will validate that the signal that terminated the test case matches the one provided in this call. Otherwise, the exact value will be ignored. .It Fn atf_tc_expect_timeout "reason" "..." Expects the test case to execute for longer than its timeout. .El .Ss Helper macros for common checks The library provides several macros that are very handy in multiple situations. These basically check some condition after executing a given statement or processing a given expression and, if the condition is not met, they report the test case as failed. .Pp The .Sq REQUIRE variant of the macros immediately abort the test case as soon as an error condition is detected by calling the .Fn atf_tc_fail function. Use this variant whenever it makes no sense to continue the execution of a test case when the checked condition is not met. The .Sq CHECK variant, on the other hand, reports a failure as soon as it is encountered using the .Fn atf_tc_fail_nonfatal function, but the execution of the test case continues as if nothing had happened. Use this variant whenever the checked condition is important as a result of the test case, but there are other conditions that can be subsequently checked on the same run without aborting. .Pp Additionally, the .Sq MSG variants take an extra set of parameters to explicitly specify the failure message. This failure message is formatted according to the .Xr printf 3 formatters. .Pp .Fn ATF_CHECK , .Fn ATF_CHECK_MSG , .Fn ATF_REQUIRE and .Fn ATF_REQUIRE_MSG take an expression and fail if the expression evaluates to false. .Pp .Fn ATF_CHECK_EQ , .Fn ATF_CHECK_EQ_MSG , .Fn ATF_REQUIRE_EQ and .Fn ATF_REQUIRE_EQ_MSG take two expressions and fail if the two evaluated values are not equal. .Pp .Fn ATF_CHECK_MATCH , .Fn ATF_CHECK_MATCH_MSG , .Fn ATF_REQUIRE_MATCH and .Fn ATF_REQUIRE_MATCH_MSG take a regular expression and a string and fail if the regular expression does not match the given string. Note that the regular expression is not anchored, so it will match anywhere in the string. .Pp .Fn ATF_CHECK_STREQ , .Fn ATF_CHECK_STREQ_MSG , .Fn ATF_REQUIRE_STREQ and .Fn ATF_REQUIRE_STREQ_MSG take two strings and fail if the two are not equal character by character. .Pp .Fn ATF_CHECK_ERRNO and .Fn ATF_REQUIRE_ERRNO take, first, the error code that the check is expecting to find in the .Va errno variable and, second, a boolean expression that, if evaluates to true, means that a call failed and .Va errno has to be checked against the first value. .Ss Utility functions The following functions are provided as part of the .Nm API to simplify the creation of a variety of tests. In particular, these are useful to write tests for command-line interfaces. .Pp .Ft void .Fo atf_utils_cat_file .Fa "const char *file" .Fa "const char *prefix" .Fc .Bd -ragged -offset indent Prints the contents of .Fa file to the standard output, prefixing every line with the string in .Fa prefix . .Ed .Pp .Ft bool .Fo atf_utils_compare_file .Fa "const char *file" .Fa "const char *contents" .Fc .Bd -ragged -offset indent Returns true if the given .Fa file matches exactly the expected inlined .Fa contents . .Ed .Pp .Ft void .Fo atf_utils_copy_file .Fa "const char *source" .Fa "const char *destination" .Fc .Bd -ragged -offset indent Copies the file .Fa source to .Fa destination . The permissions of the file are preserved during the code. .Ed .Pp .Ft void .Fo atf_utils_create_file .Fa "const char *file" .Fa "const char *contents" .Fa "..." .Fc .Bd -ragged -offset indent Creates .Fa file with the text given in .Fa contents , which is a formatting string that uses the rest of the variable arguments. .Ed .Pp .Ft void .Fo atf_utils_file_exists .Fa "const char *file" .Fc .Bd -ragged -offset indent Checks if .Fa file exists. .Ed .Pp .Ft pid_t .Fo atf_utils_fork .Fa "void" .Fc .Bd -ragged -offset indent Forks a process and redirects the standard output and standard error of the child to files for later validation with .Fn atf_utils_wait . Fails the test case if the fork fails, so this does not return an error. .Ed .Pp .Ft void .Fo atf_utils_free_charpp .Fa "char **argv" .Fc .Bd -ragged -offset indent Frees a dynamically-allocated array of dynamically-allocated strings. .Ed .Pp .Ft bool .Fo atf_utils_grep_file .Fa "const char *regexp" .Fa "const char *file" .Fa "..." .Fc .Bd -ragged -offset indent Searches for the .Fa regexp , which is a formatting string representing the regular expression, in the .Fa file . The variable arguments are used to construct the regular expression. .Ed .Pp .Ft bool .Fo atf_utils_grep_string .Fa "const char *regexp" .Fa "const char *str" .Fa "..." .Fc .Bd -ragged -offset indent Searches for the .Fa regexp , which is a formatting string representing the regular expression, in the literal string .Fa str . The variable arguments are used to construct the regular expression. .Ed .Pp .Ft char * .Fo atf_utils_readline .Fa "int fd" .Fc .Bd -ragged -offset indent Reads a line from the file descriptor .Fa fd . The line, if any, is returned as a dynamically-allocated buffer that must be released with .Xr free 3 . If there was nothing to read, returns .Sq NULL . .Ed .Pp .Ft void .Fo atf_utils_redirect .Fa "const int fd" .Fa "const char *file" .Fc .Bd -ragged -offset indent Redirects the given file descriptor .Fa fd to .Fa file . This function exits the process in case of an error and does not properly mark the test case as failed. As a result, it should only be used in subprocesses of the test case; specially those spawned by .Fn atf_utils_fork . .Ed .Pp .Ft void .Fo atf_utils_wait .Fa "const pid_t pid" .Fa "const int expected_exit_status" .Fa "const char *expected_stdout" .Fa "const char *expected_stderr" .Fc .Bd -ragged -offset indent Waits and validates the result of a subprocess spawned with .Fn atf_utils_wait . The validation involves checking that the subprocess exited cleanly and returned the code specified in .Fa expected_exit_status and that its standard output and standard error match the strings given in .Fa expected_stdout and .Fa expected_stderr . .Pp If any of the .Fa expected_stdout or .Fa expected_stderr strings are prefixed with .Sq save: , then they specify the name of the file into which to store the stdout or stderr of the subprocess, and no comparison is performed. .Ed .Sh EXAMPLES The following shows a complete test program with a single test case that validates the addition operator: .Bd -literal -offset indent #include ATF_TC(addition); ATF_TC_HEAD(addition, tc) { atf_tc_set_md_var(tc, "descr", "Sample tests for the addition operator"); } ATF_TC_BODY(addition, tc) { ATF_CHECK_EQ(0 + 0, 0); ATF_CHECK_EQ(0 + 1, 1); ATF_CHECK_EQ(1 + 0, 1); ATF_CHECK_EQ(1 + 1, 2); ATF_CHECK_EQ(100 + 200, 300); } ATF_TC(string_formatting); ATF_TC_HEAD(string_formatting, tc) { atf_tc_set_md_var(tc, "descr", "Sample tests for the snprintf"); } ATF_TC_BODY(string_formatting, tc) { char buf[1024]; snprintf(buf, sizeof(buf), "a %s", "string"); ATF_CHECK_STREQ_MSG("a string", buf, "%s is not working"); } ATF_TC(open_failure); ATF_TC_HEAD(open_failure, tc) { atf_tc_set_md_var(tc, "descr", "Sample tests for the open function"); } ATF_TC_BODY(open_failure, tc) { ATF_CHECK_ERRNO(ENOENT, open("non-existent", O_RDONLY) == -1); } ATF_TC(known_bug); ATF_TC_HEAD(known_bug, tc) { atf_tc_set_md_var(tc, "descr", "Reproduces a known bug"); } ATF_TC_BODY(known_bug, tc) { atf_tc_expect_fail("See bug number foo/bar"); ATF_CHECK_EQ(3, 1 + 1); atf_tc_expect_pass(); ATF_CHECK_EQ(3, 1 + 2); } ATF_TP_ADD_TCS(tp) { ATF_TP_ADD_TC(tp, addition); ATF_TP_ADD_TC(tp, string_formatting); ATF_TP_ADD_TC(tp, open_failure); ATF_TP_ADD_TC(tp, known_bug); return atf_no_error(); } .Ed .Sh SEE ALSO .Xr atf-test-program 1 , .Xr atf-test-case 4