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* libusbx test library helper functions
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* Copyright © 2012 Toby Gray <toby.gray@realvnc.com>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "libusbx_testlib.h"
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#if !defined(_WIN32_WCE)
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#include <sys/types.h>
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#if defined(_WIN32_WCE)
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// No support for selective redirection of STDOUT on WinCE.
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#define DISABLE_STDOUT_REDIRECTION
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#define STDOUT_FILENO 1
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#define fdopen _fdopen
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#define NULL_PATH "nul"
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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#define NULL_PATH "/dev/null"
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#define IGNORE_RETVAL(expr) do { (void)(expr); } while(0)
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* Converts a test result code into a human readable string.
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static const char* test_result_to_str(libusbx_testlib_result result)
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case TEST_STATUS_SUCCESS:
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case TEST_STATUS_FAILURE:
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case TEST_STATUS_ERROR:
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case TEST_STATUS_SKIP:
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static void print_usage(int argc, char ** argv)
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printf("Usage: %s [-l] [-v] [<test_name> ...]\n",
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argc > 0 ? argv[0] : "test_*");
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printf(" -l List available tests\n");
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printf(" -v Don't redirect STDERR/STDOUT during tests\n");
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static void cleanup_test_output(libusbx_testlib_ctx * ctx)
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#ifndef DISABLE_STDOUT_REDIRECTION
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if (ctx->old_stdout != INVALID_FD) {
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IGNORE_RETVAL(dup2(ctx->old_stdout, STDOUT_FILENO));
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ctx->old_stdout = INVALID_FD;
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if (ctx->old_stderr != INVALID_FD) {
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IGNORE_RETVAL(dup2(ctx->old_stderr, STDERR_FILENO));
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ctx->old_stderr = INVALID_FD;
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if (ctx->null_fd != INVALID_FD) {
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ctx->null_fd = INVALID_FD;
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if (ctx->output_file != stdout) {
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fclose(ctx->output_file);
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ctx->output_file = stdout;
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* Setup test output handles
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* \return zero on success, non-zero on failure
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static int setup_test_output(libusbx_testlib_ctx * ctx)
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#ifndef DISABLE_STDOUT_REDIRECTION
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/* Stop output to stdout and stderr from being displayed if using non-verbose output */
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/* Keep a copy of STDOUT and STDERR */
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ctx->old_stdout = dup(STDOUT_FILENO);
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if (ctx->old_stdout < 0) {
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ctx->old_stdout = INVALID_FD;
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printf("Failed to duplicate stdout handle: %d\n", errno);
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ctx->old_stderr = dup(STDERR_FILENO);
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if (ctx->old_stderr < 0) {
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ctx->old_stderr = INVALID_FD;
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cleanup_test_output(ctx);
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printf("Failed to duplicate stderr handle: %d\n", errno);
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/* Redirect STDOUT_FILENO and STDERR_FILENO to /dev/null or "nul"*/
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ctx->null_fd = open(NULL_PATH, O_WRONLY);
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if (ctx->null_fd < 0) {
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ctx->null_fd = INVALID_FD;
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cleanup_test_output(ctx);
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printf("Failed to open null handle: %d\n", errno);
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if ((dup2(ctx->null_fd, STDOUT_FILENO) < 0) ||
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(dup2(ctx->null_fd, STDERR_FILENO) < 0)) {
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cleanup_test_output(ctx);
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ctx->output_file = fdopen(ctx->old_stdout, "w");
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if (!ctx->output_file) {
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cleanup_test_output(ctx);
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printf("Failed to open FILE for output handle: %d\n", errno);
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void libusbx_testlib_logf(libusbx_testlib_ctx * ctx,
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const char* fmt, ...)
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vfprintf(ctx->output_file, fmt, va);
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fprintf(ctx->output_file, "\n");
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fflush(ctx->output_file);
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int libusbx_testlib_run_tests(int argc,
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const libusbx_testlib_test * tests)
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libusbx_testlib_result test_result;
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libusbx_testlib_ctx ctx;
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/* Setup default mode of operation */
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ctx.test_names = NULL;
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ctx.list_tests = false;
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ctx.old_stdout = INVALID_FD;
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ctx.old_stderr = INVALID_FD;
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ctx.output_file = stdout;
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ctx.null_fd = INVALID_FD;
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/* Parse command line options */
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for (j = 1; j < argc; j++) {
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arglen = strlen(argv[j]);
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if ( ((argv[j][0] == '-') || (argv[j][0] == '/')) &&
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switch (argv[j][1]) {
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ctx.list_tests = true;
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printf("Unknown option: '%s'\n", argv[j]);
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print_usage(argc, argv);
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/* End of command line options, remaining must be list of tests to run */
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ctx.test_names = argv + j;
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ctx.test_count = argc - j;
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/* Validate command line options */
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if (ctx.test_names && ctx.list_tests) {
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printf("List of tests requested but test list provided\n");
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print_usage(argc, argv);
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/* Setup test log output */
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r = setup_test_output(&ctx);
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/* Act on any options not related to running tests */
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if (ctx.list_tests) {
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while (tests[idx].function != NULL) {
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libusbx_testlib_logf(&ctx, tests[idx].name);
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cleanup_test_output(&ctx);
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/* Run any requested tests */
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while (tests[idx].function != NULL) {
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const libusbx_testlib_test * test = &tests[idx];
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if (ctx.test_count > 0) {
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/* Filtering tests to run, check if this is one of them */
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for (i = 0; i < ctx.test_count; ++i) {
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if (strcmp(ctx.test_names[i], test->name) == 0)
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/* Matches a requested test name */
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if (i >= ctx.test_count) {
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/* Failed to find a test match, so do the next loop iteration */
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libusbx_testlib_logf(&ctx,
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"Starting test run: %s...", test->name);
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test_result = test->function(&ctx);
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libusbx_testlib_logf(&ctx,
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test_result_to_str(test_result), test_result);
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switch (test_result) {
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case TEST_STATUS_SUCCESS: pass_count++; break;
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case TEST_STATUS_FAILURE: fail_count++; break;
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case TEST_STATUS_ERROR: error_count++; break;
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case TEST_STATUS_SKIP: skip_count++; break;
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libusbx_testlib_logf(&ctx, "---");
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libusbx_testlib_logf(&ctx, "Ran %d tests", run_count);
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libusbx_testlib_logf(&ctx, "Passed %d tests", pass_count);
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libusbx_testlib_logf(&ctx, "Failed %d tests", fail_count);
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libusbx_testlib_logf(&ctx, "Error in %d tests", error_count);
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libusbx_testlib_logf(&ctx, "Skipped %d tests", skip_count);
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cleanup_test_output(&ctx);
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return pass_count != run_count;