feat(fs): Add filesystem validation test suite and related cof.

[JakubAndrysek]

This pull request introduces a new filesystem validation test suite for ESP32, covering SPIFFS, FFat, and LittleFS implementations. It adds comprehensive documentation, configuration files, and a basic test runner to facilitate automated testing and highlight differences between the filesystems.

Test Suite and Documentation

• Added a detailed README.md explaining the scope, test categories, and known filesystem-specific behaviours for SPIFFS, FFat, and LittleFS.

Test and Configuration Files

• Added a partition table (partitions.csv) defining regions for each filesystem type to support the test suite.
• Added a CI configuration file (ci.yml) specifying that QEMU is not used for these tests.
• Added a test runner script (test_fs.py) that uses pytest_embedded and pytest_embedded_wokwi to execute the Unity-based tests on the DUT (Device Under Test).

Test scenarios

Tested in Wokwi:
esp32: SUCCESS
esp32c3: SUCCESS
esp32c6: SUCCESS
esp32h2: SUCCESS
esp32p4: SUCCESS
esp32s2: SUCCESS
esp32s3: SUCCESS

Also successfully tested on esp32 and esp32s3.

[github-actions]

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Test Results

 83 files   83 suites   16m 5s ⏱️
 39 tests  38 ✅ 0 💤 0 ❌ 1 🔥
248 runs  241 ✅ 0 💤 0 ❌ 7 🔥

For more details on these errors, see this check.

Results for commit a9a4e99.

♻️ This comment has been updated with latest results.

[lucasssvaz]

Is this test only for wokwi or for HW tests too ?

[JakubAndrysek]

Oh, sorry. HW tests too. I will enable them
Can I also enable the QEMU?

[lucasssvaz]

Oh, sorry. HW tests too. I will enable them Can I also enable the QEMU?

Then you can delete the ci.yml file and do the test something like this:

def test_fs(dut):
    dut.expect_unity_test_output(timeout=120)

[Copilot]

Pull request overview

This PR introduces a comprehensive filesystem validation test suite for ESP32 that validates SPIFFS, FFat, and LittleFS implementations using the Unity testing framework. The suite covers basic operations, directory management, binary I/O, edge cases, and filesystem-specific behaviors.

Key changes:

• Added 16 comprehensive test cases covering filesystem operations including reads, writes, seeks, directory operations, and edge cases
• Created filesystem abstraction layer with IFileSystem interface and WrappedFS template class to provide unified testing across different filesystem implementations
• Added partition table with dedicated regions for each filesystem type (SPIFFS, FFat, LittleFS)

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
tests/validation/fs/fs.ino	Main test implementation with 759 lines containing filesystem abstraction layer and 16 test functions that run across all three filesystem types
tests/validation/fs/test_fs.py	Pytest runner that executes Unity tests on device/simulator with 300-second timeout
tests/validation/fs/partitions.csv	Partition table defining memory regions for nvs, factory app, and three filesystem partitions (fat, spiffs, littlefs)
tests/validation/fs/ci.yml	CI configuration specifying QEMU is disabled for these tests
tests/validation/fs/README.md	Comprehensive documentation explaining test scope, categories, and filesystem-specific behaviors

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