# Test Coverage Progress Report

## Summary

Initial coverage: **7.1%**  
Current coverage: **7.9%**

## Packages Improved

| Package | Before | After | Improvement |
|---------|--------|-------|-------------|
| `internal/exitcode` | 0.0% | **100.0%** | +100.0% |
| `internal/errors` | 0.0% | **100.0%** | +100.0% |
| `internal/metadata` | 0.0% | **92.2%** | +92.2% |
| `internal/checks` | 10.2% | **20.3%** | +10.1% |
| `internal/fs` | 9.4% | **20.9%** | +11.5% |

## Packages With Good Coverage (>50%)

| Package | Coverage |
|---------|----------|
| `internal/errors` | 100.0% |
| `internal/exitcode` | 100.0% |
| `internal/metadata` | 92.2% |
| `internal/encryption` | 78.0% |
| `internal/crypto` | 71.1% |
| `internal/logger` | 62.7% |
| `internal/performance` | 58.9% |

## Packages Needing Attention (0% coverage)

These packages have no test coverage and should be prioritized:

- `cmd/*` - All command files (CLI commands)
- `internal/auth`
- `internal/cleanup`
- `internal/cpu`
- `internal/database`
- `internal/drill`
- `internal/engine/native`
- `internal/engine/parallel`
- `internal/engine/snapshot`
- `internal/installer`
- `internal/metrics`
- `internal/migrate`
- `internal/parallel`
- `internal/prometheus`
- `internal/replica`
- `internal/report`
- `internal/rto`
- `internal/swap`
- `internal/tui`
- `internal/wal`

## Tests Created

1. **`internal/exitcode/codes_test.go`** - Comprehensive tests for exit codes
   - Tests all exit code constants
   - Tests `ExitWithCode()` function with various error patterns
   - Tests `contains()` helper function
   - Benchmarks included

2. **`internal/errors/errors_test.go`** - Complete error package tests
   - Tests all error codes and categories
   - Tests `BackupError` struct methods (Error, Unwrap, Is)
   - Tests all factory functions (NewConfigError, NewAuthError, etc.)
   - Tests helper constructors (ConnectionFailed, DiskFull, etc.)
   - Tests IsRetryable, GetCategory, GetCode functions
   - Benchmarks included

3. **`internal/metadata/metadata_test.go`** - Metadata handling tests
   - Tests struct field initialization
   - Tests Save/Load operations
   - Tests CalculateSHA256
   - Tests ListBackups
   - Tests FormatSize
   - JSON marshaling tests
   - Benchmarks included

4. **`internal/fs/fs_test.go`** - Extended filesystem tests
   - Tests for SetFS, ResetFS, NewMemMapFs
   - Tests for NewReadOnlyFs, NewBasePathFs
   - Tests for Create, Open, OpenFile
   - Tests for Remove, RemoveAll, Rename
   - Tests for Stat, Chmod, Chown, Chtimes
   - Tests for Mkdir, ReadDir, DirExists
   - Tests for TempFile, CopyFile, FileSize
   - Tests for SecureMkdirAll, SecureCreate, SecureOpenFile
   - Tests for SecureMkdirTemp, CheckWriteAccess

5. **`internal/checks/error_hints_test.go`** - Error classification tests
   - Tests ClassifyError for all error categories
   - Tests classifyErrorByPattern
   - Tests FormatErrorWithHint
   - Tests FormatMultipleErrors
   - Tests formatBytes
   - Tests DiskSpaceCheck and ErrorClassification structs

## Next Steps to Reach 99%

1. **cmd/ package** - Test CLI commands using mock executions
2. **internal/database** - Database connection tests with mocks
3. **internal/backup** - Backup logic with mocked database/filesystem
4. **internal/restore** - Restore logic tests
5. **internal/catalog** - Improve from 40.1%
6. **internal/cloud** - Cloud provider tests with mocked HTTP
7. **internal/engine/*** - Engine tests with mocked processes

## Running Coverage

```bash
# Run all tests with coverage
go test -coverprofile=coverage.out ./...

# View coverage summary
go tool cover -func=coverage.out | grep "total:"

# Generate HTML report
go tool cover -html=coverage.out -o coverage.html

# Run specific package tests
go test -v -cover ./internal/errors/
```
