Add integration tests with build tags

[devin-ai-integration]

Add Integration Tests with Build Tags

This PR adds integration tests for the id3stat application that test the end-to-end functionality. The integration tests cover all three input methods:

1. Direct command-line arguments
2. List file input
3. Directory input

Build tags have been added:

• unittest tag for unit test files
• integtest tag for integration test files

The GitHub Actions workflow has been updated to run both unit and integration tests in separate steps.

Testing

• Unit tests pass locally with go test -tags unittest -v ./...
• Integration tests pass locally with go test -tags integtest -v ./...
• All tests pass together with go test -tags 'unittest integtest' -v ./...

Link to Devin run: https://app.devin.ai/sessions/229d37467b304b5faa850547e905a097
Requested by: developer@upperstream.io

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[Copilot]

Pull Request Overview

This PR introduces integration tests for the id3stat application to verify end-to-end functionality through different input methods (command-line, list file, and directory). It also adds build tags for differentiating unit tests from integration tests and updates the GitHub Actions workflow to run these tests in separate steps.

• Adds integration test files with build tag "integtest"
• Updates GitHub Actions workflow to run unit and integration tests separately
• Extends CHANGELOG with integration testing details

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
mp3file_test.go	Added unit test build tag
integration_test.go	New integration tests verifying behavior for various input methods
id3stat_test.go	Added unit test build tag
CHANGELOG.md	Updated CHANGELOG to include integration testing details
.github/workflows/go-test.yml	Modified workflow to run tests with separate build tags

Comments suppressed due to low confidence (1)

integration_test.go:14

• [nitpick] Consider renaming createIntegTestFileWithID3v1Tag and createIntegTestFileWithoutID3v1Tag to align with existing naming conventions (e.g., createMockMp3FileWithID3v1Tag) for improved clarity and consistency.

func createIntegTestFileWithID3v1Tag(t *testing.T, path string) {

[devin-ai-integration]

Thank you for the review. The code is using ioutil.WriteFile which has been available since Go 1.0, not os.WriteFile. This is compatible with Go 1.6 as required by the project. The integration tests are passing successfully with the current implementation.