usb_host: Build USB test app in CI

Relates to #69

This commit is a good reason why #16 should be addressed

.github/workflows/build_test_app_usb.yml

@@ -0,0 +1,37 @@
+name: Build USB Test Application
+
+on:
+  schedule:
+    - cron: '0 0 * * *' # Once per day at midnight
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  build:
+    name: Build USB Test App
+    strategy:
+      fail-fast: false
+      matrix:
+        idf_ver: ["release-v4.4", "latest"]
+        idf_target: ["esp32s2", "esp32s3"]
+    runs-on: ubuntu-20.04
+    container: espressif/idf:${{ matrix.idf_ver }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build USB Test Application
+        env:
+          IDF_TARGET: ${{ matrix.idf_target }}
+        shell: bash
+        working-directory: usb/test_app
+        run: |
+          . ${IDF_PATH}/export.sh
+          idf.py build
+      - uses: actions/upload-artifact@v2
+        with:
+          name: usb_test_app_bin_${{ matrix.idf_target }}_${{ matrix.idf_ver }}
+          path: |
+            usb/test_app/build/bootloader/bootloader.bin
+            usb/test_app/build/partition_table/partition-table.bin
+            usb/test_app/build/usb_test_app.bin
+            usb/test_app/build/usb_test_app.elf
+            usb/test_app/build/flasher_args.json

usb/test_app/CMakeLists.txt

@@ -2,10 +2,10 @@
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.16)
 
-set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/peripherals/usb/host/cdc/common
+set(EXTRA_COMPONENT_DIRS ../usb_host_cdc_acm
                          $ENV{IDF_PATH}/examples/peripherals/usb/host/msc/components/)
 
 # Set the components to include the tests for.
-set(TEST_COMPONENTS "cdc_acm_host" "msc" CACHE STRING "List of components to test")
+set(TEST_COMPONENTS "usb_host_cdc_acm" "msc" CACHE STRING "List of components to test")
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(usb_test_app)

usb/usb_host_cdc_acm/test/CMakeLists.txt

@@ -1,3 +1,3 @@
 idf_component_register(SRCS "test_cdc_acm_host.c" "usb_device.c"
                        INCLUDE_DIRS "."
-                       REQUIRES cdc_acm_host tinyusb unity)
+                       REQUIRES usb_host_cdc_acm tinyusb unity)