tests: bluetooth: host: conn: Add bt_conn_le_create unit test

Add a test that checks behavior of
CONFIG_BT_CONN_CHECK_NULL_BEFORE_CREATE Kconfig option.

Signed-off-by: Pavel Vasilyev <pavel.vasilyev@nordicsemi.no>

Author: PavelVPV

tests/bluetooth/host/conn/CMakeLists.txt

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr COMPONENTS unittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(conn)
+
+include_directories(BEFORE
+    ${ZEPHYR_BASE}/tests/bluetooth/host/conn
+    ${ZEPHYR_BASE}/tests/bluetooth/host/conn/mocks/zephyr/include
+)
+
+add_subdirectory(${ZEPHYR_BASE}/tests/bluetooth/host host_mocks)
+add_subdirectory(${ZEPHYR_BASE}/tests/bluetooth/host/conn/mocks mocks)
+
+target_link_libraries(testbinary PRIVATE mocks host_mocks)
+
+target_sources(testbinary
+    PRIVATE
+    src/main.c
+
+    ${ZEPHYR_BASE}/subsys/bluetooth/host/conn.c
+    ${ZEPHYR_BASE}/subsys/logging/log_minimal.c
+    ${ZEPHYR_BASE}/lib/net_buf/buf.c
+    ${ZEPHYR_BASE}/lib/net_buf/buf_simple.c
+)

tests/bluetooth/host/conn/mocks/CMakeLists.txt

@@ -0,0 +1,34 @@
+#
+# CMakeLists.txt file for creating of mocks library.
+#
+
+add_library(mocks STATIC
+	addr_internal.c
+	att_internal.c
+	bt_str.c
+	buf_view.c
+	hci_core.c
+	id.c
+	kernel.c
+	l2cap_internal.c
+	scan.c
+	smp.c
+	spinlock.c
+	sys_clock.c
+)
+
+target_include_directories(mocks PUBLIC
+	${ZEPHYR_BASE}/tests/bluetooth/host/conn/mocks
+	${ZEPHYR_BASE}/subsys/bluetooth
+)
+
+target_compile_options(test_interface INTERFACE -include ztest.h)
+target_link_libraries(mocks PRIVATE test_interface)
+target_link_options(mocks PUBLIC
+	"SHELL:-T ${ZEPHYR_BASE}/tests/bluetooth/host/conn/mocks/mock-sections.ld"
+)
+
+target_compile_options(mocks
+	PRIVATE
+	-DCONFIG_BT_ID_MAX=1
+)

tests/bluetooth/host/conn/mocks/addr_internal.c

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+
+#include "addr_internal.h"
+
+DEFINE_FAKE_VOID_FUNC(bt_addr_le_copy_resolved, bt_addr_le_t *, const bt_addr_le_t *);
+DEFINE_FAKE_VALUE_FUNC(bool, bt_addr_le_is_resolved, const bt_addr_le_t *);

tests/bluetooth/host/conn/mocks/addr_internal.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/fff.h>
+#include <zephyr/bluetooth/addr.h>
+
+/* List of fakes used by this unit tester */
+#define ADDR_INTERNAL_MOCKS_FFF_FAKES_LIST(FAKE)                                                   \
+	FAKE(bt_addr_le_copy_resolved)                                                             \
+	FAKE(bt_addr_le_is_resolved)
+
+DECLARE_FAKE_VOID_FUNC(bt_addr_le_copy_resolved, bt_addr_le_t *, const bt_addr_le_t *);
+DECLARE_FAKE_VALUE_FUNC(bool, bt_addr_le_is_resolved, const bt_addr_le_t *);

tests/bluetooth/host/conn/mocks/att_internal.c

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+
+#include "att_internal.h"
+
+DEFINE_FAKE_VOID_FUNC(bt_att_init);

tests/bluetooth/host/conn/mocks/att_internal.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/fff.h>
+
+/* List of fakes used by this unit tester */
+#define ATT_INTERNAL_MOCKS_FFF_FAKES_LIST(FAKE) FAKE(bt_att_init)
+
+DECLARE_FAKE_VOID_FUNC(bt_att_init);

tests/bluetooth/host/conn/mocks/bt_str.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/bluetooth/addr.h>
+
+#include "bt_str.h"
+
+const char *bt_addr_le_str(const bt_addr_le_t *addr)
+{
+	static char str[BT_ADDR_LE_STR_LEN];
+
+	bt_addr_le_to_str(addr, str, sizeof(str));
+
+	return str;
+}

tests/bluetooth/host/conn/mocks/bt_str.h

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/bluetooth/addr.h>
+
+const char *bt_addr_le_str(const bt_addr_le_t *addr);

tests/bluetooth/host/conn/mocks/buf_view.c

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+
+#include "buf_view.h"
+
+DEFINE_FAKE_VALUE_FUNC(bool, bt_buf_has_view, const struct net_buf *);
+DEFINE_FAKE_VALUE_FUNC(struct net_buf *, bt_buf_make_view, struct net_buf *, struct net_buf *,
+		       size_t, struct bt_buf_view_meta *);
+DEFINE_FAKE_VOID_FUNC(bt_buf_destroy_view, struct net_buf *, struct bt_buf_view_meta *);

tests/bluetooth/host/conn/mocks/buf_view.h

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/fff.h>
+
+/* List of fakes used by this unit tester */
+#define BUF_VIEW_MOCKS_FFF_FAKES_LIST(FAKE) FAKE(bt_buf_has_view)                                  \
+	FAKE(bt_buf_make_view)                                                                     \
+	FAKE(bt_buf_destroy_view)
+
+DECLARE_FAKE_VALUE_FUNC(bool, bt_buf_has_view, const struct net_buf *);
+DECLARE_FAKE_VALUE_FUNC(struct net_buf *, bt_buf_make_view, struct net_buf *, struct net_buf *,
+			size_t, struct bt_buf_view_meta *);
+DECLARE_FAKE_VOID_FUNC(bt_buf_destroy_view, struct net_buf *, struct bt_buf_view_meta *);