tests/ovstest.h

   1 /*
   2  * Copyright (c) 2014 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef OVSTEST_H
  18 #define OVSTEST_H
  19
  20 #include "compiler.h"
  21
  22 /* Overview
  23  * ========
  24  *
  25  * OVS tests directory contains many small test programs. One down side
  26  * of building them as individual programs is that they all have to be
  27  * linked whenever a library function is modified.
  28  *
  29  * ovstest is an attempt to improve the overall build time by linking
  30  * all test programs into a single program, ovs-test. Regardless of
  31  * the number of test programs, linking will be done only once to produce
  32  * ovstest.
  33  *
  34  * With ovstest, each test programs now becomes a sub program of ovstest.
  35  * For example, 'mytest' program, can now be invoked as 'ovstest mytest'.
  36  *
  37  * 'ovstest --help' will list all test programs can be invoked.
  38  *
  39  * The 'Usage' section below documents how to add a new sub program
  40  * to ovstest using OVSTEST_REIGSTER macros.
  41  */
  42
  43 typedef void (*ovstest_func)(int argc, char *argv[]);
  44 void ovstest_register(const char *test_name, ovstest_func f);
  45
  46 /* Usage
  47  * =====
  48  *
  49  * For each sub test program, its 'main' program should be named as
  50  * '<test_name>_main()'.
  51  *
  52  * The 'main' programs should be registered with ovstest as a sub program.
  53  *    OVSTEST_REGISTER(name, function)
  54  *
  55  * 'name' will be name of the test program. It is expected as argv[1] when
  56  * invoking with ovstest.
  57  *
  58  * 'function' is the 'main' program mentioned above.
  59  *
  60  * Example:
  61  * ----------
  62  *
  63  * Suppose the test program is called my-test.c
  64  * ...
  65  *
  66  * static void
  67  * my_test_main(int argc, char *argv[])
  68  * {
  69  *   ....
  70  * }
  71  *
  72  * OVSTEST_REGISTER("my-test", my_test_main);
  73  */
  74 #define OVSTEST_REGISTER(name, function) \
  75     OVS_CONSTRUCTOR(register_##function) { \
  76         ovstest_register(name, function); \
  77     }
  78
  79 #endif