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 #include "command-line.h"
  23
  24 /* Overview
  25  * ========
  26  *
  27  * OVS tests directory contains many small test programs. One down side
  28  * of building them as individual programs is that they all have to be
  29  * linked whenever a library function is modified.
  30  *
  31  * ovstest is an attempt to improve the overall build time by linking
  32  * all test programs into a single program, ovs-test. Regardless of
  33  * the number of test programs, linking will be done only once to produce
  34  * ovstest.
  35  *
  36  * With ovstest, each test programs now becomes a sub program of ovstest.
  37  * For example, 'mytest' program, can now be invoked as 'ovstest mytest'.
  38  *
  39  * 'ovstest --help' will list all test programs can be invoked.
  40  *
  41  * The 'Usage' section below documents how to add a new sub program
  42  * to ovstest using OVSTEST_REIGSTER macros.
  43  */
  44
  45 typedef void (*ovstest_func)(int argc, char *argv[]);
  46
  47 void ovstest_register(const char *test_name, ovs_cmdl_handler f);
  48
  49 /* Usage
  50  * =====
  51  *
  52  * For each sub test program, its 'main' program should be named as
  53  * '<test_name>_main()'.
  54  *
  55  * The 'main' programs should be registered with ovstest as a sub program.
  56  *    OVSTEST_REGISTER(name, function)
  57  *
  58  * 'name' will be name of the test program. It is expected as argv[1] when
  59  * invoking with ovstest.
  60  *
  61  * 'function' is the 'main' program mentioned above.
  62  *
  63  * Example:
  64  * ----------
  65  *
  66  * Suppose the test program is called my-test.c
  67  * ...
  68  *
  69  * static void
  70  * my_test_main(int argc, char *argv[])
  71  * {
  72  *   ....
  73  * }
  74  *
  75  * OVSTEST_REGISTER("my-test", my_test_main);
  76  */
  77 #define OVSTEST_REGISTER(name, function) \
  78     static void \
  79     ovstest_wrapper_##function##__(struct ovs_cmdl_context *ctx) \
  80     { \
  81         function(ctx->argc, ctx->argv); \
  82     } \
  83     OVS_CONSTRUCTOR(register_##function) { \
  84         ovstest_register(name, ovstest_wrapper_##function##__); \
  85     }
  86
  87 #endif