Add support for table-driven testing.

The new TEST_P macro takes a function name and a "data" argument to
point to an arbitrary array of known size of test data. This allows
multiple tests to be run with different datasets. The array is stored
as a void * but advanced by a known size on each iteration.

The data for each invocation of the test is provided as a "data" argument,
it is the responsibility of the test to cast it to something sensible.

Also fixed single-test running to only run the tests specified

2 files changed, 112 insertions, 63 deletions

diff --git a/tests/weston-test-runner.c b/tests/weston-test-runner.c
index ed5baf08..4274b393 100644
--- a/tests/weston-test-runner.c
+++ b/tests/weston-test-runner.c
@@ -47,9 +47,9 @@ find_test(const char *name)
 }
 
 static void
-run_test(const struct weston_test *t)
+run_test(const struct weston_test *t, void *data)
 {
-	t->run();
+	t->run(data);
 	exit(EXIT_SUCCESS);
 }
 
@@ -63,12 +63,75 @@ list_tests(void)
 		fprintf(stderr, "	%s\n", t->name);
 }
 
+static int
+exec_and_report_test(const struct weston_test *t, void *test_data, int iteration)
+{
+	int success = 0;
+	int hardfail = 0;
+	siginfo_t info;
+
+	pid_t pid = fork();
+	assert(pid >= 0);
+
+	if (pid == 0)
+		run_test(t, test_data); /* never returns */
+
+	if (waitid(P_ALL, 0, &info, WEXITED)) {
+		fprintf(stderr, "waitid failed: %m\n");
+		abort();
+	}
+
+	if (test_data)
+		fprintf(stderr, "test \"%s/%i\":\t", t->name, iteration);
+	else
+		fprintf(stderr, "test \"%s\":\t", t->name);
+
+	switch (info.si_code) {
+	case CLD_EXITED:
+		fprintf(stderr, "exit status %d", info.si_status);
+		if (info.si_status == EXIT_SUCCESS)
+			success = 1;
+		break;
+	case CLD_KILLED:
+	case CLD_DUMPED:
+		fprintf(stderr, "signal %d", info.si_status);
+		if (info.si_status != SIGABRT)
+			hardfail = 1;
+		break;
+	}
+
+	if (t->must_fail)
+		success = !success;
+
+	if (success && !hardfail) {
+		fprintf(stderr, ", pass.\n");
+		return 1;
+	} else { 
+		fprintf(stderr, ", fail.\n");
+		return 0;
+	}
+}
+
+/* Returns number of tests and number of pass / fail in param args */
+static int
+iterate_test(const struct weston_test *t, int *passed)
+{
+	int i;
+	void *current_test_data = (void *) t->table_data;
+	for (i = 0; i < t->n_elements; ++i, current_test_data += t->element_size)
+	{
+		if (exec_and_report_test(t, current_test_data, i))
+			++(*passed);
+	}
+
+	return t->n_elements;
+}
+
 int main(int argc, char *argv[])
 {
 	const struct weston_test *t;
-	pid_t pid;
-	int total, pass;
-	siginfo_t info;
+	int total = 0;
+	int pass = 0;
 
 	if (argc == 2) {
 		const char *testname = argv[1];
@@ -86,51 +149,17 @@ int main(int argc, char *argv[])
 			exit(EXIT_FAILURE);
 		}
 
-		run_test(t);
-	}
-
-	pass = 0;
-	for (t = &__start_test_section; t < &__stop_test_section; t++) {
-		int success = 0;
-		int hardfail = 0;
-
-		pid = fork();
-		assert(pid >= 0);
-
-		if (pid == 0)
-			run_test(t); /* never returns */
-
-		if (waitid(P_ALL, 0, &info, WEXITED)) {
-			fprintf(stderr, "waitid failed: %m\n");
-			abort();
+		int number_passed_in_test = 0;
+		total += iterate_test(t, &number_passed_in_test);
+		pass += number_passed_in_test;
+	} else {
+		for (t = &__start_test_section; t < &__stop_test_section; t++) {
+			int number_passed_in_test = 0;
+			total += iterate_test(t, &number_passed_in_test);
+			pass += number_passed_in_test;
 		}
-
-		fprintf(stderr, "test \"%s\":\t", t->name);
-		switch (info.si_code) {
-		case CLD_EXITED:
-			fprintf(stderr, "exit status %d", info.si_status);
-			if (info.si_status == EXIT_SUCCESS)
-				success = 1;
-			break;
-		case CLD_KILLED:
-		case CLD_DUMPED:
-			fprintf(stderr, "signal %d", info.si_status);
-			if (info.si_status != SIGABRT)
-				hardfail = 1;
-			break;
-		}
-
-		if (t->must_fail)
-			success = !success;
-
-		if (success && !hardfail) {
-			pass++;
-			fprintf(stderr, ", pass.\n");
-		} else
-			fprintf(stderr, ", fail.\n");
 	}
 
-	total = &__stop_test_section - &__start_test_section;
 	fprintf(stderr, "%d tests, %d pass, %d fail\n",
 		total, pass, total - pass);
 
diff --git a/tests/weston-test-runner.h b/tests/weston-test-runner.h
index 41df3868..457cf31c 100644
--- a/tests/weston-test-runner.h
+++ b/tests/weston-test-runner.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2012 Intel Corporation
+ * Copyright © 2013 Sam Spilsbury <smspillaz@gmail.com>
  *
  * Permission to use, copy, modify, distribute, and sell this software and
  * its documentation for any purpose is hereby granted without fee, provided
@@ -23,34 +24,53 @@
 #ifndef _WESTON_TEST_RUNNER_H_
 #define _WESTON_TEST_RUNNER_H_
 
+#include <stdlib.h>
+
 #ifdef NDEBUG
 #error "Tests must not be built with NDEBUG defined, they rely on assert()."
 #endif
 
 struct weston_test {
 	const char *name;
-	void (*run)(void);
+	void (*run)(void *);
+	const void *table_data;
+	size_t element_size;
+	int n_elements;
 	int must_fail;
-} __attribute__ ((aligned (16)));
+} __attribute__ ((aligned (32)));
 
-#define TEST(name)						\
-	static void name(void);					\
+#define TEST_BEGIN(name, arg)					\
+	static void name(arg)
+
+#define TEST_COMMON(func, name, ret, data, size, n_elem)	\
+	static void func(void *);				\
 								\
 	const struct weston_test test##name			\
-		 __attribute__ ((section ("test_section"))) = {	\
-		#name, name, 0					\
-	};							\
-								\
-	static void name(void)
+		__attribute__ ((section ("test_section"))) =	\
+	{							\
+		#name, func, data, size, n_elem, ret		\
+	};
 
-#define FAIL_TEST(name)						\
+#define NO_ARG_TEST(name, ret)					\
+	TEST_COMMON(wrap##name, name, ret, NULL, 0, 1)		\
 	static void name(void);					\
+	static void wrap##name(void *data)			\
+	{							\
+		(void) data;					\
+		name();						\
+	}							\
 								\
-	const struct weston_test test##name			\
-		 __attribute__ ((section ("test_section"))) = {	\
-		#name, name, 1					\
-	};							\
-								\
-	static void name(void)
+	TEST_BEGIN(name, void)
+
+#define ARG_TEST(name, ret, test_data)				\
+	TEST_COMMON(name, name, ret, test_data,			\
+		    sizeof(test_data[0]),			\
+		    sizeof(test_data) / sizeof (test_data[0]))	\
+	TEST_BEGIN(name, void *data)				\
+
+#define TEST(name) NO_ARG_TEST(name, 0)
+#define FAIL_TEST(name) NO_ARG_TEST(name, 1)
+#define TEST_P(name, data) ARG_TEST(name, 0, data)
+#define FAIL_TEST_P(name, data) ARG_TEST(name, 1, data)
 
 #endif