--- /dev/null
+/* We use the fact that pipes have a buffer greater than the size of
+ * any output, and change stdout and stderr to use that.
+ *
+ * Since we don't use libtap for output, this looks like one big test. */
+#include "tap/tap.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <err.h>
+#include <string.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <fnmatch.h>
+
+/* We dup stderr to here. */
+static int stderrfd;
+
+/* Simple replacement for err() */
+static void failmsg(const char *fmt, ...)
+{
+ char buf[1024];
+ va_list ap;
+
+ /* Write into buffer. */
+ va_start(ap, fmt);
+ vsprintf(buf, fmt, ap);
+ va_end(ap);
+
+ write(stderrfd, "# ", 2);
+ write(stderrfd, buf, strlen(buf));
+ write(stderrfd, "\n", 1);
+ _exit(1);
+}
+
+static void expect(int fd, const char *pattern)
+{
+ char buffer[PIPE_BUF+1];
+ int r;
+
+ r = read(fd, buffer, sizeof(buffer)-1);
+ if (r < 0)
+ failmsg("reading from pipe");
+ buffer[r] = '\0';
+
+ if (fnmatch(pattern, buffer, 0) != 0)
+ failmsg("Expected '%s' got '%s'", pattern, buffer);
+}
+
+int main(int argc, char *argv[])
+{
+ int p[2];
+ int stdoutfd;
+
+ printf("1..1\n");
+ fflush(stdout);
+ stderrfd = dup(STDERR_FILENO);
+ if (stderrfd < 0)
+ err(1, "dup of stderr failed");
+
+ stdoutfd = dup(STDOUT_FILENO);
+ if (stdoutfd < 0)
+ err(1, "dup of stdout failed");
+
+ if (pipe(p) != 0)
+ failmsg("pipe failed");
+
+ if (dup2(p[1], STDERR_FILENO) < 0 || dup2(p[1], STDOUT_FILENO) < 0)
+ failmsg("Duplicating file descriptor");
+
+ plan_tests(10);
+ expect(p[0], "1..10\n");
+
+ ok(1, "msg1");
+ expect(p[0], "ok 1 - msg1\n");
+
+ ok(0, "msg2");
+ expect(p[0], "not ok 2 - msg2\n"
+ "# Failed test (*tap/test/run.c:main() at line 77)\n");
+
+ ok1(true);
+ expect(p[0], "ok 3 - true\n");
+
+ ok1(false);
+ expect(p[0], "not ok 4 - false\n"
+ "# Failed test (*tap/test/run.c:main() at line 84)\n");
+
+ pass("passed");
+ expect(p[0], "ok 5 - passed\n");
+
+ fail("failed");
+ expect(p[0], "not ok 6 - failed\n"
+ "# Failed test (*tap/test/run.c:main() at line 91)\n");
+
+ skip(2, "skipping %s", "test");
+ expect(p[0], "ok 7 # skip skipping test\n"
+ "ok 8 # skip skipping test\n");
+
+ todo_start("todo");
+ ok1(false);
+ expect(p[0], "not ok 9 - false # TODO todo\n"
+ "# Failed (TODO) test (*tap/test/run.c:main() at line 100)\n");
+ ok1(true);
+ expect(p[0], "ok 10 - true # TODO todo\n");
+ todo_end();
+
+ if (exit_status() != 3)
+ failmsg("Expected exit status 3, not %i", exit_status());
+
+#if 0
+ /* Manually run the atexit command. */
+ _cleanup();
+ expect(p[0], "# Looks like you failed 2 tests of 9.\n");
+#endif
+
+ write(stdoutfd, "ok 1 - All passed\n", strlen("ok 1 - All passed\n"));
+ _exit(0);
+}