[dpdk-dev] [PATCH v2 1/3] tests/kvargs: fix to consider empty elements as valid

[Olivier Matz <olivier.matz@6wind.com>]

Empty elements passed to the kvargs parser are silently
ignored. Examples of valid strings:
  ""
  ","
  ",,,,,,key=val,,,,"

Fix the unit tests to conform to this behavior.

Note: the test_invalid_kvargs() function is currently broken, which
explain why the tests were not failing. It is fixed in the next commit.

Fixes: e495f5435524 ("kvargs: add test case in app/test")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---
 app/test/test_kvargs.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/app/test/test_kvargs.c b/app/test/test_kvargs.c
index a42056f36..d3db88a57 100644
--- a/app/test/test_kvargs.c
+++ b/app/test/test_kvargs.c
@@ -142,7 +142,7 @@ static int test_valid_kvargs(void)
 	valid_keys = valid_keys_list;
 	kvlist = rte_kvargs_parse(args, valid_keys);
 	if (kvlist == NULL) {
-		printf("rte_kvargs_parse() error");
+		printf("rte_kvargs_parse() error\n");
 		goto fail;
 	}
 	if (strcmp(kvlist->pairs[0].value, "[0,1]") != 0) {
@@ -157,6 +157,40 @@ static int test_valid_kvargs(void)
 	}
 	rte_kvargs_free(kvlist);
 
+	/* test using empty string (it is valid) */
+	args = "";
+	kvlist = rte_kvargs_parse(args, NULL);
+	if (kvlist == NULL) {
+		printf("rte_kvargs_parse() error\n");
+		goto fail;
+	}
+	if (rte_kvargs_count(kvlist, NULL) != 0) {
+		printf("invalid count value\n");
+		goto fail;
+	}
+	rte_kvargs_free(kvlist);
+
+	/* test using empty elements (it is valid) */
+	args = "foo=1,,check=value2,,";
+	kvlist = rte_kvargs_parse(args, NULL);
+	if (kvlist == NULL) {
+		printf("rte_kvargs_parse() error\n");
+		goto fail;
+	}
+	if (rte_kvargs_count(kvlist, NULL) != 2) {
+		printf("invalid count value\n");
+		goto fail;
+	}
+	if (rte_kvargs_count(kvlist, "foo") != 1) {
+		printf("invalid count value for 'foo'\n");
+		goto fail;
+	}
+	if (rte_kvargs_count(kvlist, "check") != 1) {
+		printf("invalid count value for 'check'\n");
+		goto fail;
+	}
+	rte_kvargs_free(kvlist);
+
 	return 0;
 
  fail:
@@ -179,7 +213,6 @@ static int test_invalid_kvargs(void)
 	const char *args_list[] = {
 		"wrong-key=x",     /* key not in valid_keys_list */
 		"foo=1,foo=",      /* empty value */
-		"foo=1,,foo=2",    /* empty key/value */
 		"foo=1,foo",       /* no value */
 		"foo=1,=2",        /* no key */
 		"foo=[1,2",        /* no closing bracket in value */
-- 
2.25.1