test/unit: add test_sanity

This test ensures that the custom uc_assert_xxx() macros are working
as intended.

test/unit/test_sanity.c

@@ -0,0 +1,88 @@
+#include "unicorn_test.h"
+
+/* Make sure the uc_assert macros work with constants */
+static void test_uc_assert_macros_constants(void **state)
+{
+    const uc_err nomem = UC_ERR_NOMEM;
+
+    uc_assert_success(UC_ERR_OK);
+    uc_assert_err(UC_ERR_NOMEM, nomem);
+    uc_assert_fail(UC_ERR_VERSION);
+}
+
+/******************************************************************************/
+
+static uc_err feedback(uc_err err, int *callcount)
+{
+    assert_int_equal(++(*callcount), 1);
+    return err;
+}
+
+/**
+ * Make sure the uc_assert macros work with function calls
+ * and only evaluate them once!
+ */
+static void test_uc_assert_macros_func_calls(void **state)
+{
+    int callcount;
+
+    callcount = 0;
+    uc_assert_success(feedback(UC_ERR_OK, &callcount));
+
+    callcount = 0;
+    uc_assert_err(UC_ERR_NOMEM, feedback(UC_ERR_NOMEM, &callcount));
+
+    callcount = 0;
+    uc_assert_fail(feedback(UC_ERR_VERSION, &callcount));
+}
+
+/******************************************************************************/
+
+static void fail_uc_assert_success(void **state)
+{
+    uc_assert_success(UC_ERR_NOMEM);
+}
+
+static void fail_uc_assert_err(void **state)
+{
+    const uc_err ok = UC_ERR_OK;
+    uc_assert_err(UC_ERR_VERSION, ok);
+}
+
+static void fail_uc_assert_fail(void **state)
+{
+    uc_assert_fail(UC_ERR_OK);
+}
+
+static void test_uc_assert_macros_fail(void **state)
+{
+    /* A test-inside-a-test */
+
+    const struct CMUnitTest tests[] = {
+        /* these should all fail */
+        cmocka_unit_test(fail_uc_assert_success),
+        cmocka_unit_test(fail_uc_assert_err),
+        cmocka_unit_test(fail_uc_assert_fail),
+    };
+
+    print_message("\n\n--------------------------------------------------------------------------------\n");
+    print_message("START: Failure of the following tests is expected.\n\n");
+
+    assert_int_not_equal(0, cmocka_run_group_tests(tests, NULL, NULL));
+
+    print_message("\n\nEND: Failure of the preceding tests was expected.\n");
+    print_message("--------------------------------------------------------------------------------\n\n");
+}
+
+/******************************************************************************/
+
+int main(void)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(test_uc_assert_macros_constants),
+        cmocka_unit_test(test_uc_assert_macros_func_calls),
+        cmocka_unit_test(test_uc_assert_macros_fail),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}