Add tests for csp_buffer

This commit adds test for csp_buffer allocator.

Signed-off-by: Yasushi SHOJI <[email protected]>

Author: yashi

CMakeLists.txt

@@ -5,4 +5,7 @@ cmake_minimum_required(VERSION 3.13.1)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(speq)
 
-target_sources(app PRIVATE src/main.c)
+target_sources(app PRIVATE
+  src/main.c
+  src/buffer.c
+)

src/buffer.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2024 Space Cubics, LLC.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/ztest.h>
+#include <csp/csp.h>
+
+static void *setup(void)
+{
+	csp_init();
+	return NULL;
+}
+
+ZTEST(buffer, test_buffer_count)
+{
+	csp_packet_t *packets[CSP_BUFFER_COUNT];
+	int i;
+
+	memset(packets, 0, sizeof(packets));
+
+	zassert_true(csp_buffer_remaining() == CSP_BUFFER_COUNT);
+
+	for (i = 0; i < CSP_BUFFER_COUNT; i++) {
+		packets[i] = csp_buffer_get(0);
+		zassert_true(packets[i] != NULL, NULL);
+	}
+
+	zassert_true(csp_buffer_remaining() == 0);
+
+	for (i = 0; i < CSP_BUFFER_COUNT; i++) {
+		csp_buffer_free(packets[i]);
+	}
+
+	zassert_true(csp_buffer_remaining() == CSP_BUFFER_COUNT);
+}
+
+ZTEST(buffer, test_buffer_over_allocate)
+{
+	csp_packet_t *packets[CSP_BUFFER_COUNT];
+	csp_packet_t *p;
+	int i;
+
+	memset(packets, 0, sizeof(packets));
+
+	for (i = 0; i < CSP_BUFFER_COUNT; i++) {
+		packets[i] = csp_buffer_get(0);
+		zassert_true(packets[i] != NULL, NULL);
+	}
+
+	zassert_true(csp_buffer_remaining() == 0);
+	p = csp_buffer_get(0);
+	zassert_true(p == NULL, NULL);
+
+	for (i = 0; i < CSP_BUFFER_COUNT; i++) {
+		csp_buffer_free(packets[i]);
+	}
+}
+
+ZTEST_SUITE(buffer, NULL, setup, NULL, NULL, NULL);