[nrf fromtree] modem: pipe: Add test suite

Add test suite for the modem_pipe module.

Signed-off-by: Bjarki Arge Andreasen <[email protected]>
(cherry picked from commit 9176e5c)

Author: bjarki-andreasen

tests/subsys/modem/modem_pipe/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright (c) 2023 Trackunit Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(modem_pipe_test)
+
+target_sources(app PRIVATE src/main.c)

tests/subsys/modem/modem_pipe/prj.conf

@@ -0,0 +1,8 @@
+# Copyright (c) 2023 Trackunit Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_NO_OPTIMIZATIONS=y
+CONFIG_MODEM_MODULES=y
+CONFIG_MODEM_PIPE=y
+CONFIG_EVENTS=y
+CONFIG_ZTEST=y