[test-improver] Improve tests for logger package

[github-actions]

Test Improvements: common_test.go

File Analyzed

• Test File: internal/logger/common_test.go
• Package: internal/logger
• Lines of Code: 713 → 697 (cleaner, more concise)

Improvements Made

1. Better Testing Patterns

• ✅ Converted all manual error checks to testify assertions
• ✅ Added bound asserters (assert.New(t), require.New(t)) to 21 test functions
• ✅ Eliminated repetitive t parameter passing
• ✅ Consistent use of require for critical checks, assert for non-critical checks

2. Enhanced Assertions

• ✅ Replaced ~30+ instances of if err != nil { t.Fatalf/t.Errorf(...) } with require.NoError() or assert.NoError()
• ✅ Replaced manual if err == nil { t.Error(...) } with assert.Error()
• ✅ Replaced manual strings.Contains checks with assert.Contains() / assert.NotContains()
• ✅ Replaced manual size comparisons with assert.Equal()
• ✅ Better error messages throughout

3. Cleaner & More Stable Tests

• ✅ Consistent testing patterns across all 23 test functions
• ✅ Improved readability with bound asserters
• ✅ Better separation of critical (require) vs non-critical (assert) checks
• ✅ More maintainable code structure

Coverage Analysis

Previous Coverage: Tests covered closeLogFile, initLogFile, and initLogger functions
New Coverage: Same coverage maintained with cleaner, more maintainable tests
Improvement: +0% coverage (already comprehensive), but significantly improved test quality

Test Execution

The improvements maintain all existing test coverage while making the tests:

• More readable: Bound asserters eliminate repetitive t parameters
• More consistent: Uniform use of testify assertions throughout
• More maintainable: Clear patterns that are easy to follow and extend
• More professional: Follows Go testing best practices with testify

Sample Improvements

Before:

if _, err := file.WriteString("test content\n"); err != nil {
    t.Fatalf("Failed to write to file: %v", err)
}

if !strings.Contains(string(content), "test content") {
    t.Errorf("File content not preserved: %s", content)
}

After:

assert := assert.New(t)
require := require.New(t)

_, err = file.WriteString("test content\n")
require.NoError(err, "Failed to write to file")

assert.Contains(string(content), "test content", "File content should be preserved")

Why These Changes?

This test file was selected because it had:

1. Inconsistent patterns: Mix of testify and manual error checking
2. Repetitive code: Passing t to every assertion instead of using bound asserters
3. Manual checks: String contains checks and conditionals that testify handles better

These improvements make the tests:

• Easier to read and understand
• More consistent with modern Go testing practices
• Better aligned with the testify library (already in go.mod)
• More maintainable for future modifications

All 23 test functions were improved while maintaining 100% of existing test coverage.

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Focuses on better patterns, increased coverage, and more stable tests

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