feat(class/cdc): Add parsing host tests

.build-test-rules.yml

@@ -5,3 +5,7 @@ device/esp_tinyusb:
 host/class:
   enable:
     - if: SOC_USB_OTG_SUPPORTED == 1
+
+host/class/cdc/usb_host_cdc_acm/host_test:
+  enable:
+    - if: IDF_TARGET in ["linux"] and (IDF_VERSION_MAJOR >= 5 and IDF_VERSION_MINOR >= 4)

.github/workflows/build_and_run_host_test.yml

@@ -0,0 +1,29 @@
+name: Build and Run USB Host test
+
+on:
+  schedule:
+    - cron: '0 0 * * SAT' # Saturday midnight
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  build:
+    name: Build
+    strategy:
+      fail-fast: false
+      matrix:
+        idf_ver: ["latest"]
+    runs-on: ubuntu-20.04
+    container: espressif/idf:${{ matrix.idf_ver }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+      - name: Build USB Test Application
+        shell: bash
+        run: |
+          . ${IDF_PATH}/export.sh
+          pip install pytest pytest-cpp idf-build-apps==2.4.3 --upgrade
+          idf-build-apps find --target linux
+          idf-build-apps build --target linux
+          pytest host/class/cdc/usb_host_cdc_acm/host_test/build_linux

.github/workflows/build_and_run_test_app_usb.yml

@@ -63,4 +63,4 @@ jobs:
           PIP_EXTRA_INDEX_URL: "https://dl.espressif.com/pypi/"
         run: pip install --only-binary cryptography pytest-embedded pytest-embedded-serial-esp pytest-embedded-idf pyserial pyusb
       - name: Run USB Test App on target
-        run: pytest --target=${{ matrix.idf_target }} -m usb_host --build-dir=build_${{ matrix.idf_target }}
+        run: pytest --embedded-services esp,idf --target=${{ matrix.idf_target }} -m usb_host --build-dir=build_${{ matrix.idf_target }}

host/class/cdc/usb_host_cdc_acm/host_test/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+set(COMPONENTS main)
+
+list(APPEND EXTRA_COMPONENT_DIRS
+     "$ENV{IDF_PATH}/tools/mocks/usb/"
+     "$ENV{IDF_PATH}/tools/mocks/freertos/"
+    )
+
+project(host_test_usb_cdc)

host/class/cdc/usb_host_cdc_acm/host_test/README.md

@@ -0,0 +1,30 @@
+| Supported Targets | Linux |
+| ----------------- | ----- |
+
+# Description
+
+This directory contains test code for `USB Host CDC-ACM` driver. Namely:
+* Descriptor parsing
+
+Tests are written using [Catch2](https://github.com/catchorg/Catch2) test framework, use CMock, so you must install Ruby on your machine to run them.
+
+# Build
+
+Tests build regularly like an idf project. Currently only working on Linux machines. 
+
+```
+idf.py --preview set-target linux
+idf.py build
+```
+
+# Run
+
+The build produces an executable in the build folder. 
+
+Just run:
+
+```
+./build/host_test_usb_cdc.elf
+```
+
+The test executable have some options provided by the test framework. 

host/class/cdc/usb_host_cdc_acm/host_test/main/CMakeLists.txt

@@ -0,0 +1,9 @@
+idf_component_register(SRC_DIRS .
+                        REQUIRES cmock usb
+                        INCLUDE_DIRS .
+                        PRIV_INCLUDE_DIRS "../../private_include"
+                        WHOLE_ARCHIVE)
+
+# Currently 'main' for IDF_TARGET=linux is defined in freertos component.
+# Since we are using a freertos mock here, need to let Catch2 provide 'main'.
+target_link_libraries(${COMPONENT_LIB} PRIVATE Catch2WithMain)