[2/3] test: add dwk hash autotests

diff --git a/app/test/Makefile b/app/test/Makefile
index 1f080d1..6f3a461 100644
--- a/app/test/Makefile
+++ b/app/test/Makefile
@@ -73,6 +73,7 @@  SRCS-y += test_bitmap.c
 SRCS-y += test_reciprocal_division.c
 SRCS-y += test_reciprocal_division_perf.c
 SRCS-y += test_fbarray.c
+SRCS-y += test_dwk_hash.c
 SRCS-y += test_external_mem.c
 SRCS-y += test_rand_perf.c
 
diff --git a/app/test/meson.build b/app/test/meson.build
index 0a2ce71..2433be3 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -45,6 +45,7 @@  test_sources = files('commands.c',
 	'test_eventdev.c',
 	'test_external_mem.c',
 	'test_fbarray.c',
+	'test_dwk_hash.c',
 	'test_fib.c',
 	'test_fib_perf.c',
 	'test_fib6.c',
diff --git a/app/test/test_dwk_hash.c b/app/test/test_dwk_hash.c
new file mode 100644
index 0000000..bf47331
--- /dev/null
+++ b/app/test/test_dwk_hash.c
@@ -0,0 +1,229 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2020 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <rte_lcore.h>
+#include <rte_dwk_hash.h>
+#include <rte_hash_crc.h>
+
+#include "test.h"
+
+typedef int32_t (*rte_dwk_hash_test)(void);
+
+static int32_t test_create_invalid(void);
+static int32_t test_multiple_create(void);
+static int32_t test_free_null(void);
+static int32_t test_add_del_invalid(void);
+static int32_t test_basic(void);
+
+#define MAX_ENT (1 << 22)
+
+/*
+ * Check that rte_dwk_hash_create fails gracefully for incorrect user input
+ * arguments
+ */
+int32_t
+test_create_invalid(void)
+{
+	struct rte_dwk_hash_table *dwk_hash = NULL;
+	struct rte_dwk_hash_params config;
+
+	/* rte_dwk_hash_create: dwk_hash name == NULL */
+	config.name = NULL;
+	dwk_hash = rte_dwk_hash_create(&config);
+	RTE_TEST_ASSERT(dwk_hash == NULL,
+		"Call succeeded with invalid parameters\n");
+	config.name = "test_dwk_hash";
+
+	/* rte_dwk_hash_create: config == NULL */
+	dwk_hash = rte_dwk_hash_create(NULL);
+	RTE_TEST_ASSERT(dwk_hash == NULL,
+		"Call succeeded with invalid parameters\n");
+
+	/* socket_id < -1 is invalid */
+	config.socket_id = -2;
+	dwk_hash = rte_dwk_hash_create(&config);
+	RTE_TEST_ASSERT(dwk_hash == NULL,
+		"Call succeeded with invalid parameters\n");
+	config.socket_id = rte_socket_id();
+
+	/* rte_dwk_hash_create: entries = 0 */
+	config.entries = 0;
+	dwk_hash = rte_dwk_hash_create(&config);
+	RTE_TEST_ASSERT(dwk_hash == NULL,
+		"Call succeeded with invalid parameters\n");
+	config.entries = MAX_ENT;
+
+	return TEST_SUCCESS;
+}
+
+/*
+ * Create dwk_hash table then delete dwk_hash table 10 times
+ * Use a slightly different rules size each time
+ */
+#include <rte_errno.h>
+int32_t
+test_multiple_create(void)
+{
+	struct rte_dwk_hash_table *dwk_hash = NULL;
+	struct rte_dwk_hash_params config;
+	int32_t i;
+
+
+	for (i = 0; i < 100; i++) {
+		config.name = "test_dwk_hash";
+		config.socket_id = -1;
+		config.entries = MAX_ENT - i;
+
+		dwk_hash = rte_dwk_hash_create(&config);
+		RTE_TEST_ASSERT(dwk_hash != NULL,
+			"Failed to create dwk hash\n");
+		rte_dwk_hash_free(dwk_hash);
+	}
+
+	return TEST_SUCCESS;
+}
+
+/*
+ * Call rte_dwk_hash_free for NULL pointer user input.
+ * Note: free has no return and therefore it is impossible
+ * to check for failure but this test is added to
+ * increase function coverage metrics and to validate that
+ * freeing null does not crash.
+ */
+int32_t
+test_free_null(void)
+{
+	struct rte_dwk_hash_table *dwk_hash = NULL;
+	struct rte_dwk_hash_params config;
+
+	config.name = "test_dwk";
+	config.socket_id = -1;
+	config.entries = MAX_ENT;
+
+	dwk_hash = rte_dwk_hash_create(&config);
+	RTE_TEST_ASSERT(dwk_hash != NULL, "Failed to create dwk hash\n");
+
+	rte_dwk_hash_free(dwk_hash);
+	rte_dwk_hash_free(NULL);
+	return TEST_SUCCESS;
+}
+
+/*
+ * Check that rte_dwk_hash_add fails gracefully for
+ * incorrect user input arguments
+ */
+int32_t
+test_add_del_invalid(void)
+{
+	uint32_t key = 10;
+	uint64_t val = 20;
+	int ret;
+
+	/* rte_dwk_hash_add: dwk_hash == NULL */
+	ret = rte_dwk_hash_add(NULL, key, rte_hash_crc_4byte(key, 0), val);
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	/* rte_dwk_hash_delete: dwk_hash == NULL */
+	ret = rte_dwk_hash_delete(NULL, key, rte_hash_crc_4byte(key, 0));
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	return TEST_SUCCESS;
+}
+
+/*
+ * Call add, lookup and delete for a single rule
+ */
+int32_t
+test_basic(void)
+{
+	struct rte_dwk_hash_table *dwk_hash = NULL;
+	struct rte_dwk_hash_params config;
+	uint32_t key = 10;
+	uint64_t value = 20;
+	uint64_t ret_val = 0;
+	int ret;
+
+	config.name = "test_dwk";
+	config.socket_id = -1;
+	config.entries = MAX_ENT;
+
+	dwk_hash = rte_dwk_hash_create(&config);
+	RTE_TEST_ASSERT(dwk_hash != NULL, "Failed to create dwk hash\n");
+
+	ret = rte_dwk_hash_lookup(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0), &ret_val);
+	RTE_TEST_ASSERT(ret == -ENOENT, "Lookup return incorrect result\n");
+
+	ret = rte_dwk_hash_delete(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0));
+	RTE_TEST_ASSERT(ret == -ENOENT, "Delete return incorrect result\n");
+
+	ret = rte_dwk_hash_add(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0), value);
+	RTE_TEST_ASSERT(ret == 0, "Can not add key into the table\n");
+
+	ret = rte_dwk_hash_lookup(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0), &ret_val);
+	RTE_TEST_ASSERT(((ret == 0) && (value == ret_val)),
+		"Lookup return incorrect result\n");
+
+	ret = rte_dwk_hash_delete(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0));
+	RTE_TEST_ASSERT(ret == 0, "Can not delete key from table\n");
+
+	ret = rte_dwk_hash_lookup(dwk_hash, key,
+		rte_hash_crc_4byte(key, 0), &ret_val);
+	RTE_TEST_ASSERT(ret == -ENOENT, "Lookup return incorrect result\n");
+
+	rte_dwk_hash_free(dwk_hash);
+
+	return TEST_SUCCESS;
+}
+
+static struct unit_test_suite dwk_hash_tests = {
+	.suite_name = "dwk_hash autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+		TEST_CASE(test_create_invalid),
+		TEST_CASE(test_free_null),
+		TEST_CASE(test_add_del_invalid),
+		TEST_CASE(test_basic),
+		TEST_CASES_END()
+	}
+};
+
+static struct unit_test_suite dwk_hash_slow_tests = {
+	.suite_name = "dwk_hash slow autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+		TEST_CASE(test_multiple_create),
+		TEST_CASES_END()
+	}
+};
+
+/*
+ * Do all unit tests.
+ */
+static int
+test_dwk_hash(void)
+{
+	return unit_test_suite_runner(&dwk_hash_tests);
+}
+
+static int
+test_slow_dwk_hash(void)
+{
+	return unit_test_suite_runner(&dwk_hash_slow_tests);
+}
+
+REGISTER_TEST_COMMAND(dwk_hash_autotest, test_dwk_hash);
+REGISTER_TEST_COMMAND(dwk_hash_slow_autotest, test_slow_dwk_hash);