[dpdk-dev] [PATCH v2] app/test: fix reorder library unit test

[Reshma Pattan <reshma.pattan@intel.com>]

The reorder library unit test was performed under the assumption that the start
sequence number was always 0.
This is not the case anymore as the start sequence number is initialized by the first
packet inserted into the reorder buffer.

This patch updates the unit test to reflect the new behavior.

Fixes: 7e1fa1de8a53 ("reorder: allow random number as starting point")

Signed-off-by: Reshma Pattan<reshma.pattan@intel.com>

---
Version 2:
split patch for unit test only
update commit message

 app/test/test_reorder.c |   75 ++++++++++++++++++++++++-----------------------
 1 files changed, 38 insertions(+), 37 deletions(-)

diff --git a/app/test/test_reorder.c b/app/test/test_reorder.c
index 5752d7e..67f3151 100644
--- a/app/test/test_reorder.c
+++ b/app/test/test_reorder.c
@@ -77,7 +77,6 @@ test_reorder_create(void)
 			"No error on create() with invalid buffer size param.");
 
 	b = rte_reorder_create("PKT_RO1", rte_socket_id(), REORDER_BUFFER_SIZE);
-	printf("DEBUG: b= %p, orig_b= %p\n", b, test_params->b);
 	TEST_ASSERT_EQUAL(b, test_params->b,
 			"New reorder instance created with already existing name");
 
@@ -165,7 +164,7 @@ test_reorder_insert(void)
 	struct rte_reorder_buffer *b = NULL;
 	struct rte_mempool *p = test_params->p;
 	const unsigned int size = 4;
-	const unsigned int num_bufs = 6;
+	const unsigned int num_bufs = 7;
 	struct rte_mbuf *bufs[num_bufs];
 	int ret = 0;
 	unsigned i;
@@ -181,16 +180,6 @@ test_reorder_insert(void)
 	ret = rte_mempool_get_bulk(p, (void *)bufs, num_bufs);
 	TEST_ASSERT_SUCCESS(ret, "Error getting mbuf from pool");
 
-	/* late packet */
-	bufs[0]->seqn = 3 * size;
-	ret = rte_reorder_insert(b, bufs[0]);
-	if (!((ret == -1) && (rte_errno == ERANGE))) {
-		printf("%s:%d: No error inserting late packet with seqn:"
-				" 3 * size\n", __func__, __LINE__);
-		ret = -1;
-		goto exit;
-	}
-
 	for (i = 0; i < num_bufs; i++)
 		bufs[i]->seqn = i;
 
@@ -232,6 +221,16 @@ test_reorder_insert(void)
 		goto exit;
 	}
 
+	/* late packet */
+	bufs[6]->seqn = 3 * size;
+	ret = rte_reorder_insert(b, bufs[6]);
+	if (!((ret == -1) && (rte_errno == ERANGE))) {
+		printf("%s:%d: No error inserting late packet with seqn:"
+				" 3 * size\n", __func__, __LINE__);
+		ret = -1;
+		goto exit;
+	}
+
 	ret = 0;
 exit:
 	rte_mempool_put_bulk(p, (void *)bufs, num_bufs);
@@ -245,8 +244,9 @@ test_reorder_drain(void)
 	struct rte_reorder_buffer *b = NULL;
 	struct rte_mempool *p = test_params->p;
 	const unsigned int size = 4;
-	const unsigned int num_bufs = 10;
+	const unsigned int num_bufs = 8;
 	struct rte_mbuf *bufs[num_bufs];
+	struct rte_mbuf *robufs[num_bufs];
 	int ret = 0;
 	unsigned i, cnt;
 
@@ -255,14 +255,14 @@ test_reorder_drain(void)
 	 * ready_buf: RB[size] = {NULL, NULL, NULL, NULL}
 	 * order_buf: OB[size] = {NULL, NULL, NULL, NULL}
 	 */
-	b = rte_reorder_create("test_insert", rte_socket_id(), size);
+	b = rte_reorder_create("test_drain", rte_socket_id(), size);
 	TEST_ASSERT_NOT_NULL(b, "Failed to create reorder buffer");
 
 	ret = rte_mempool_get_bulk(p, (void *)bufs, num_bufs);
 	TEST_ASSERT_SUCCESS(ret, "Error getting mbuf from pool");
 
 	/* Check no drained packets if reorder is empty */
-	cnt = rte_reorder_drain(b, bufs, 1);
+	cnt = rte_reorder_drain(b, robufs, 1);
 	if (cnt != 0) {
 		printf("%s:%d: drained packets from empty reorder buffer\n",
 				__func__, __LINE__);
@@ -276,29 +276,40 @@ test_reorder_drain(void)
 	/* Insert packet with seqn 1:
 	 * reorder_seq = 0
 	 * RB[] = {NULL, NULL, NULL, NULL}
-	 * OB[] = {NULL, 1, NULL, NULL}
+	 * OB[] = {1, NULL, NULL, NULL}
 	 */
 	rte_reorder_insert(b, bufs[1]);
 
-	/* Check no drained packets if no ready/order packets */
-	cnt = rte_reorder_drain(b, bufs, 1);
-	if (cnt != 0) {
-		printf("%s:%d: drained packets from empty reorder buffer\n",
-				__func__, __LINE__);
+	cnt = rte_reorder_drain(b, robufs, 1);
+	if (cnt != 1) {
+		printf("%s:%d:%d: number of expected packets not drained\n",
+				__func__, __LINE__, cnt);
 		ret = -1;
 		goto exit;
 	}
 
 	/* Insert more packets
 	 * RB[] = {NULL, NULL, NULL, NULL}
-	 * OB[] = {0, 1, NULL, 3}
+	 * OB[] = {NULL, 2, 3, NULL}
 	 */
-	rte_reorder_insert(b, bufs[0]);
+	rte_reorder_insert(b, bufs[2]);
 	rte_reorder_insert(b, bufs[3]);
 
+	/* Insert more packets
+	 * RB[] = {NULL, NULL, NULL, NULL}
+	 * OB[] = {NULL, 2, 3, 4}
+	 */
+	rte_reorder_insert(b, bufs[4]);
+
+	/* Insert more packets
+	 * RB[] = {2, 3, 4, NULL}
+	 * OB[] = {NULL, NULL, 7, NULL}
+	 */
+	rte_reorder_insert(b, bufs[7]);
+
 	/* drained expected packets */
-	cnt = rte_reorder_drain(b, bufs, 4);
-	if (cnt != 2) {
+	cnt = rte_reorder_drain(b, robufs, 4);
+	if (cnt != 3) {
 		printf("%s:%d:%d: number of expected packets not drained\n",
 				__func__, __LINE__, cnt);
 		ret = -1;
@@ -307,25 +318,15 @@ test_reorder_drain(void)
 
 	/*
 	 * RB[] = {NULL, NULL, NULL, NULL}
-	 * OB[] = {NULL, 3, NULL, NULL}
-	 */
-
-	rte_reorder_insert(b, bufs[4]);
-	rte_reorder_insert(b, bufs[7]);
-
-	/*
-	 * RB[] = {3, 4, NULL, NULL}
 	 * OB[] = {NULL, NULL, 7, NULL}
 	 */
-
-	cnt = rte_reorder_drain(b, bufs, 4);
-	if (cnt != 2) {
+	cnt = rte_reorder_drain(b, robufs, 1);
+	if (cnt != 0) {
 		printf("%s:%d:%d: number of expected packets not drained\n",
 				__func__, __LINE__, cnt);
 		ret = -1;
 		goto exit;
 	}
-
 	ret = 0;
 exit:
 	rte_mempool_put_bulk(p, (void *)bufs, num_bufs);
-- 
1.7.4.1