libperf: Add tests support

Adding simple test framework, now empty.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-73-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/lib/include/internal/tests.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_INTERNAL_TESTS_H
+#define __LIBPERF_INTERNAL_TESTS_H
+
+#include <stdio.h>
+
+#define __T_START fprintf(stdout, "- running %s...", __FILE__)
+#define __T_OK    fprintf(stdout, "OK\n")
+#define __T_FAIL  fprintf(stdout, "FAIL\n")
+
+#define __T(text, cond)                                                          \
+do {                                                                             \
+	if (!(cond)) {                                                           \
+		fprintf(stderr, "FAILED %s:%d %s\n", __FILE__, __LINE__, text);  \
+		return -1;                                                       \
+	}                                                                        \
+} while (0)
+
+#endif /* __LIBPERF_INTERNAL_TESTS_H */