[PATCH v3 2/2] test/strsep: add tests for function strsep()

[Andre Muezerie <andremue@linux.microsoft.com>]

This patch adds tests for the strsep() function.

Signed-off-by: Andre Muezerie <andremue@linux.microsoft.com>
---
 app/test/meson.build   |   1 +
 app/test/test_strsep.c | 109 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 app/test/test_strsep.c

diff --git a/app/test/meson.build b/app/test/meson.build
index 7d38f51918..8cc960c540 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -187,6 +187,7 @@ source_file_deps = {
     'test_stack.c': ['stack'],
     'test_stack_perf.c': ['stack'],
     'test_string_fns.c': [],
+    'test_strsep.c': [],
     'test_table.c': ['table', 'pipeline', 'port'],
     'test_table_acl.c': ['net', 'table', 'pipeline', 'port'],
     'test_table_combined.c': ['table', 'pipeline', 'port'],
diff --git a/app/test/test_strsep.c b/app/test/test_strsep.c
new file mode 100644
index 0000000000..6c2ff67c18
--- /dev/null
+++ b/app/test/test_strsep.c
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (C) 2025 Microsoft Corporation
+ */
+
+#include <string.h>
+#include <rte_os_shim.h>
+
+#include "test.h"
+
+static int
+test_strsep_helper(const char *str, const char *delim,
+		   const char * const expected_tokens[], size_t expected_tokens_count)
+{
+	char *s_dup = str != NULL ? strdup(str) : NULL;
+	char *s = s_dup;
+	const char *token;
+	for (size_t i = 0; i < expected_tokens_count; i++) {
+		token = strsep(&s, delim);
+		if (token == NULL) {
+			printf("Expected token '%s', got NULL\n", expected_tokens[i]);
+			free(s_dup);
+			return TEST_FAILED;
+		}
+		if (strcmp(expected_tokens[i], token) != 0) {
+			printf("Expected '%s', got '%s'\n", expected_tokens[i], token);
+			free(s_dup);
+			return TEST_FAILED;
+		}
+	}
+	/* Check that there are no more tokens left */
+	token = strsep(&s, delim);
+	if (token != NULL) {
+		printf("Expected NULL, got '%s'\n", token);
+		free(s_dup);
+		return TEST_FAILED;
+	}
+	free(s_dup);
+	return TEST_SUCCESS;
+}
+
+static int
+test_strsep_single_delimiter(void)
+{
+	const char *str = "hello,world";
+	const char *delim = ",";
+	static const char * const expected_tokens[] = { "hello", "world" };
+	const size_t expected_tokens_count = RTE_DIM(expected_tokens);
+	return test_strsep_helper(str, delim, expected_tokens, expected_tokens_count);
+}
+
+static int
+test_strsep_multiple_delimiters(void)
+{
+	const char *str = "hello,world;this:is;a:test";
+	const char *delim = ",;:";
+	static const char * const expected_tokens[] = {"hello", "world", "this", "is", "a", "test"};
+	const size_t expected_tokens_count = RTE_DIM(expected_tokens);
+	return test_strsep_helper(str, delim, expected_tokens, expected_tokens_count);
+}
+
+static int
+test_strsep_string_with_no_delimiters(void)
+{
+	const char *str = "helloworld";
+	const char *delim = ",";
+	static const char * const expected_tokens[] = {"helloworld"};
+	const size_t expected_tokens_count = RTE_DIM(expected_tokens);
+	return test_strsep_helper(str, delim, expected_tokens, expected_tokens_count);
+}
+
+static int
+test_strsep_empty_string(void)
+{
+	const char *str = "";
+	const char *delim = ",";
+	static const char * const expected_tokens[] = {""};
+	const size_t expected_tokens_count = RTE_DIM(expected_tokens);
+	return test_strsep_helper(str, delim, expected_tokens, expected_tokens_count);
+}
+
+static int
+test_strsep_null(void)
+{
+	const char *str = NULL;
+	const char *delim = ",";
+	static const char * const expected_tokens[] = {""};
+	const size_t expected_tokens_count = 0;
+	return test_strsep_helper(str, delim, expected_tokens, expected_tokens_count);
+}
+
+static struct unit_test_suite test_suite = {
+	.suite_name = "Strsep test suite",
+	.unit_test_cases = {
+		TEST_CASE(test_strsep_single_delimiter),
+		TEST_CASE(test_strsep_multiple_delimiters),
+		TEST_CASE(test_strsep_string_with_no_delimiters),
+		TEST_CASE(test_strsep_empty_string),
+		TEST_CASE(test_strsep_null),
+		TEST_CASES_END()
+	}
+};
+
+static int
+test_strsep(void)
+{
+	return unit_test_suite_runner(&test_suite);
+}
+
+REGISTER_FAST_TEST(strsep_autotest, true, true, test_strsep);
-- 
2.50.1.vfs.0.0