tests/tap/basic.h

   1 /*
   2  * Basic utility routines for the TAP protocol.
   3  *
   4  * This file is part of C TAP Harness.  The current version plus supporting
   5  * documentation is at <https://www.eyrie.org/~eagle/software/c-tap-harness/>.
   6  *
   7  * Copyright 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
   8  *     Russ Allbery <eagle@eyrie.org>
   9  * Copyright 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2011, 2012, 2014
  10  *     The Board of Trustees of the Leland Stanford Junior University
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  28  * DEALINGS IN THE SOFTWARE.
  29  */
  30
  31 #ifndef TAP_BASIC_H
  32 #define TAP_BASIC_H 1
  33
  34 #include <tests/tap/macros.h>
  35 #include <stdarg.h>             /* va_list */
  36 #include <stddef.h>             /* size_t */
  37
  38 /*
  39  * Used for iterating through arrays.  ARRAY_SIZE returns the number of
  40  * elements in the array (useful for a < upper bound in a for loop) and
  41  * ARRAY_END returns a pointer to the element past the end (ISO C99 makes it
  42  * legal to refer to such a pointer as long as it's never dereferenced).
  43  */
  44 #define ARRAY_SIZE(array)       (sizeof(array) / sizeof((array)[0]))
  45 #define ARRAY_END(array)        (&(array)[ARRAY_SIZE(array)])
  46
  47 BEGIN_DECLS
  48
  49 /*
  50  * The test count.  Always contains the number that will be used for the next
  51  * test status.
  52  */
  53 extern unsigned long testnum;
  54
  55 /* Print out the number of tests and set standard output to line buffered. */
  56 void plan(unsigned long count);
  57
  58 /*
  59  * Prepare for lazy planning, in which the plan will be printed automatically
  60  * at the end of the test program.
  61  */
  62 void plan_lazy(void);
  63
  64 /* Skip the entire test suite.  Call instead of plan. */
  65 void skip_all(const char *format, ...)
  66     __attribute__((__noreturn__, __format__(printf, 1, 2)));
  67
  68 /*
  69  * Basic reporting functions.  The okv() function is the same as ok() but
  70  * takes the test description as a va_list to make it easier to reuse the
  71  * reporting infrastructure when writing new tests.  ok() and okv() return the
  72  * value of the success argument.
  73  */
  74 int ok(int success, const char *format, ...)
  75     __attribute__((__format__(printf, 2, 3)));
  76 int okv(int success, const char *format, va_list args)
  77     __attribute__((__format__(printf, 2, 0)));
  78 void skip(const char *reason, ...)
  79     __attribute__((__format__(printf, 1, 2)));
  80
  81 /*
  82  * Report the same status on, or skip, the next count tests.  ok_block()
  83  * returns the value of the success argument.
  84  */
  85 int ok_block(unsigned long count, int success, const char *format, ...)
  86     __attribute__((__format__(printf, 3, 4)));
  87 void skip_block(unsigned long count, const char *reason, ...)
  88     __attribute__((__format__(printf, 2, 3)));
  89
  90 /*
  91  * Check an expected value against a seen value.  Returns true if the test
  92  * passes and false if it fails.  is_bool takes an int since the bool type
  93  * isn't fully portable yet, but interprets both arguments for their truth
  94  * value, not for their numeric value.
  95  */
  96 int is_bool(int wanted, int seen, const char *format, ...)
  97     __attribute__((__format__(printf, 3, 4)));
  98 int is_int(long wanted, long seen, const char *format, ...)
  99     __attribute__((__format__(printf, 3, 4)));
 100 int is_string(const char *wanted, const char *seen, const char *format, ...)
 101     __attribute__((__format__(printf, 3, 4)));
 102 int is_hex(unsigned long wanted, unsigned long seen, const char *format, ...)
 103     __attribute__((__format__(printf, 3, 4)));
 104
 105 /* Bail out with an error.  sysbail appends strerror(errno). */
 106 void bail(const char *format, ...)
 107     __attribute__((__noreturn__, __nonnull__, __format__(printf, 1, 2)));
 108 void sysbail(const char *format, ...)
 109     __attribute__((__noreturn__, __nonnull__, __format__(printf, 1, 2)));
 110
 111 /* Report a diagnostic to stderr prefixed with #. */
 112 int diag(const char *format, ...)
 113     __attribute__((__nonnull__, __format__(printf, 1, 2)));
 114 int sysdiag(const char *format, ...)
 115     __attribute__((__nonnull__, __format__(printf, 1, 2)));
 116
 117 /*
 118  * Register or unregister a file that contains supplementary diagnostics.
 119  * Before any other output, all registered files will be read, line by line,
 120  * and each line will be reported as a diagnostic as if it were passed to
 121  * diag().  Nul characters are not supported in these files and will result in
 122  * truncated output.
 123  */
 124 void diag_file_add(const char *file)
 125     __attribute__((__nonnull__));
 126 void diag_file_remove(const char *file)
 127     __attribute__((__nonnull__));
 128
 129 /* Allocate memory, reporting a fatal error with bail on failure. */
 130 void *bcalloc(size_t, size_t)
 131     __attribute__((__alloc_size__(1, 2), __malloc__, __warn_unused_result__));
 132 void *bmalloc(size_t)
 133     __attribute__((__alloc_size__(1), __malloc__, __warn_unused_result__));
 134 void *breallocarray(void *, size_t, size_t)
 135     __attribute__((__alloc_size__(2, 3), __malloc__, __warn_unused_result__));
 136 void *brealloc(void *, size_t)
 137     __attribute__((__alloc_size__(2), __malloc__, __warn_unused_result__));
 138 char *bstrdup(const char *)
 139     __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
 140 char *bstrndup(const char *, size_t)
 141     __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
 142
 143 /*
 144  * Find a test file under C_TAP_BUILD or C_TAP_SOURCE, returning the full
 145  * path.  The returned path should be freed with free().
 146  */
 147 char *test_file_path(const char *file)
 148     __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
 149
 150 /*
 151  * Create a temporary directory relative to C_TAP_BUILD and return the path.
 152  * The returned path should be freed with test_tmpdir_free().
 153  */
 154 char *test_tmpdir(void)
 155     __attribute__((__malloc__, __warn_unused_result__));
 156 void test_tmpdir_free(char *path);
 157
 158 /*
 159  * Register a cleanup function that is called when testing ends.  All such
 160  * registered functions will be run during atexit handling (and are therefore
 161  * subject to all the same constraints and caveats as atexit functions).
 162  *
 163  * The function must return void and will be passed two arguments: an int that
 164  * will be true if the test completed successfully and false otherwise, and an
 165  * int that will be true if the cleanup function is run in the primary process
 166  * (the one that called plan or plan_lazy) and false otherwise.
 167  */
 168 typedef void (*test_cleanup_func)(int, int);
 169 void test_cleanup_register(test_cleanup_func)
 170     __attribute__((__nonnull__));
 171
 172 END_DECLS
 173
 174 #endif /* TAP_BASIC_H */