[PATCH v2 3/4] test: Use positive conditional in test_matches()

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

It is easier to read the positive conditional.

While at it, convert hard coded length of "_test_" to strlen("_test_")
which will be converted to a constant bu optimizing compiler.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: new patch
 test/test-main.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/test/test-main.c b/test/test-main.c
index 8fcbc2361214..344122074e12 100644
--- a/test/test-main.c
+++ b/test/test-main.c
@@ -141,16 +141,16 @@ static bool test_matches(const char *prefix, const char *test_name,
 	if (!strncmp(test_name, select_name, len))
 		return true;
 
-	if (!prefix) {
+	if (prefix) {
+		/* All tests have this prefix */
+		if (!strncmp(test_name, prefix, strlen(prefix)))
+			test_name += strlen(prefix);
+	} else {
 		const char *p = strstr(test_name, "_test_");
 
 		/* convert xxx_test_yyy to yyy, i.e. remove the suite name */
 		if (p)
-			test_name = p + 6;
-	} else {
-		/* All tests have this prefix */
-		if (!strncmp(test_name, prefix, strlen(prefix)))
-			test_name += strlen(prefix);
+			test_name = p + strlen("_test_");
 	}
 
 	if (!strncmp(test_name, select_name, len))
-- 
2.30.0