Bluetooth: Host: Unit test for bt_le_cs_set_valid_chmap_bits

Add coverage of the bt_le_cs_set_valid_chmap_bits function to unit tests

Signed-off-by: Timothy Keys <timothy.keys@nordicsemi.no>

tests/bluetooth/host/cs/bt_le_cs_set_valid_chmap_bits/CMakeLists.txt

@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr COMPONENTS unittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+get_filename_component(project_name ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+project(${project_name})
+
+include_directories(BEFORE
+    ${ZEPHYR_BASE}/tests/bluetooth/host/cs/mocks
+)
+
+add_subdirectory(${ZEPHYR_BASE}/tests/bluetooth/host host_mocks)
+add_subdirectory(${ZEPHYR_BASE}/tests/bluetooth/host/cs/mocks mocks)
+
+target_link_libraries(testbinary PRIVATE mocks host_mocks)
+
+target_sources(testbinary
+    PRIVATE
+    src/main.c
+
+    ${ZEPHYR_BASE}/subsys/bluetooth/host/cs.c
+    ${ZEPHYR_BASE}/lib/net_buf/buf_simple.c
+    ${ZEPHYR_BASE}/subsys/logging/log_minimal.c
+)

tests/bluetooth/host/cs/bt_le_cs_set_valid_chmap_bits/prj.conf

@@ -0,0 +1,10 @@
+CONFIG_ZTEST=y
+CONFIG_BT=y
+CONFIG_BT_HCI=y
+CONFIG_BT_CENTRAL=y
+CONFIG_BT_CHANNEL_SOUNDING=y
+CONFIG_ASSERT=y
+CONFIG_ASSERT_LEVEL=2
+CONFIG_ASSERT_VERBOSE=y
+CONFIG_ASSERT_ON_ERRORS=y
+CONFIG_NET_BUF=y

tests/bluetooth/host/cs/bt_le_cs_set_valid_chmap_bits/src/main.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/bluetooth/cs.h>
+#include <zephyr/fff.h>
+
+DEFINE_FFF_GLOBALS;
+
+ZTEST_SUITE(bt_le_cs_set_valid_chmap_bits, NULL, NULL, NULL, NULL, NULL);
+
+/*
+ *  Test uninitialized chmap buffer is populated correctly
+ *
+ *  Expected behaviour:
+ *   - test_chmap matches correct_chmap
+ */
+ZTEST(bt_le_cs_set_valid_chmap_bits, test_uninitialized_chmap)
+{
+	uint8_t test_chmap[10];
+
+	bt_le_cs_set_valid_chmap_bits(test_chmap);
+
+	uint8_t correct_chmap[10] = {0xFC, 0xFF, 0x7F, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x1F};
+
+	zassert_mem_equal(test_chmap, correct_chmap, 10);
+}

tests/bluetooth/host/cs/bt_le_cs_set_valid_chmap_bits/testcase.yaml

@@ -0,0 +1,7 @@
+common:
+  tags:
+    - bluetooth
+    - host
+tests:
+  bluetooth.host.cs.bt_le_cs_set_valid_chmap_bits:
+    type: unit