Add test runner

This patch adds a "magic" test runner which discovers all test cases in the
executable into which it is linked. This is achieved through the use of a
special macro used to declare tests, so that they are added onto a linker-
generated list. The linker list logic is largely taken from U-Boot source code,
with minor some tweaks made.

This linker-generated list is then used at runtime in order to pick out every
test case which can be run, resulting in a cross-file "suite" of unity unit
tests, rather than separate test executables per module. A sample test module,
test_test.c is provided to illustrate the test runner's ability to correctly
discover tests across multiple translation units.

1 files changed, 21 insertions, 0 deletions

diff --git a/test_runner.c b/test_runner.c
new file mode 100644
index 0000000..9d3ad65
--- /dev/null
+++ b/test_runner.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+#include "test_runner.h"
+#include "unity.h"
+
+/* unity requires these, even if empty */
+void setUp(){};
+void tearDown(){};
+
+int main(void)
+{
+	struct test_fn *tests = list_head(struct test_fn, test_list);
+	size_t count = list_entry_count(struct test_fn, test_list);
+	printf("Suite has %zd tests\n", count);
+	UNITY_BEGIN();
+	for (size_t i = 0; i < count; i++) {
+		UnitySetTestFile(tests[i].file);
+		UnityDefaultTestRun(tests[i].fn, tests[i].name, tests[i].line);
+	}
+	UNITY_END();
+}