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PanoramicData.SheetMagic - Improvement Plan

Generated: December 2024
Last Updated: April 2026
Based on: Code Coverage Analysis, Static Analysis, Code Quality Review

April 2026 - Conditional Formatting

  • Added AddSheetOptions.ConditionalFormats to configure Excel-style conditional formatting when writing sheets.
  • Added public conditional formatting model types: ConditionalFormat, ConditionalFormatRule, ConditionalFormatStyle, ConditionalFormatRuleType, and ConditionalFormatOperator.
  • Implemented OpenXML worksheet generation that writes one conditional-formatting block per target column so Excel-relative formulas evaluate correctly.
  • Added ConditionalFormattingTests.cs covering multi-rule, multi-column, and all-column scenarios.
  • Added README guidance and XML documentation examples for the new API.

Executive Summary

Metric Before Phase 1 After Phase 1 Target Status
Line Coverage 71.8% 75.7% 85%+ ?? In Progress
Branch Coverage 61.6% 63.2% 75%+ ?? In Progress
Method Coverage 77.5% 87.0% 90%+ ?? Near Target
Code Style Issues 4 files 0 files 0 files ? Complete
XML Documentation None All public APIs All public APIs ? Complete

Phase 1 - COMPLETED ?

1.1 Formatting Issues - FIXED ?

All whitespace formatting issues have been resolved by running dotnet format.

1.2 Exception Class Tests - ADDED ?

Class Before After Status
CustomTableStyle 0% 100% ?
EmptyRowException 0% 100% ?
PropertyNotFoundException 0% 100% ?
SheetMagicException 0% 100% ?
ValidationException 0% 100% ?
Options 0% 100% ?

1.3 New Test Files Created

  • ExceptionTests.cs - 15 tests for exception classes
  • OptionsTests.cs - 17 tests for Options, CustomTableStyle, TableRowStyle
  • EmptyRowHandlingTests.cs - 5 tests for empty row scenarios

1.4 Bug Fixes

  • Fixed TableRowStyle.cs to use fully qualified System.Drawing.Color to avoid ambiguity with DocumentFormat.OpenXml.Spreadsheet.Color
  • Removed System.Drawing from global usings to prevent namespace conflicts

Phase 2 - SKIPPED ??

Phase 2 items (improving coverage for Extended<T>, MagicSpreadsheet, TableOptions) have been deferred to focus on Phase 3 deliverables.

Phase 3 - COMPLETED ?

3.1 XML Documentation - COMPLETED ?

  • Add <GenerateDocumentationFile>true</GenerateDocumentationFile> to csproj
  • Add XML documentation to all public APIs
  • Generate API documentation website (future enhancement)

3.2 Architectural Documentation

The MagicSpreadsheet class is split across multiple partial class files:

  • MagicSpreadsheet.Core.cs - Constructor, disposal, file I/O
  • MagicSpreadsheet.AddSheet.cs - Adding sheets with data
  • MagicSpreadsheet.AddItems.cs - Adding individual items
  • MagicSpreadsheet.CellFormatting.cs - Cell format handling
  • MagicSpreadsheet.CellOperations.cs - Cell read/write operations
  • MagicSpreadsheet.GetList.cs - Reading data from sheets
  • MagicSpreadsheet.GetListProcessing.cs - Data processing logic
  • MagicSpreadsheet.PropertyHelpers.cs - Reflection utilities
  • MagicSpreadsheet.Styling.cs - Style management
  • MagicSpreadsheet.Utilities.cs - Helper methods

3.3 Performance Benchmarks - COMPLETED ?

  • Add BenchmarkDotNet package
  • Create benchmarks for spreadsheet operations
  • Benchmark project created at PanoramicData.SheetMagic.Benchmarks

Benchmark Scenarios:

Benchmark Description
WriteSmallDataset Write 100 rows
WriteMediumDataset Write 1,000 rows
WriteLargeDataset Write 10,000 rows
WriteAndReadSmall Write and read 100 rows
WriteAndReadMedium Write and read 1,000 rows
WriteMultipleSheets Write 5 sheets with 100 rows each
WriteNoTableStyle Write 1,000 rows without table styling

3.4 Codacy Integration

  • .codacy.yaml file created
  • Repository added to Codacy dashboard
  • Configure quality gate thresholds
  • Enable PR analysis

Current Test Results

Test summary: total: 127, failed: 0, succeeded: 126, skipped: 1

Coverage by Class

Class Coverage
AddSheetOptions 95.4%
BuiltInCellFormats 100%
CustomTableStyle 100% ?
EmptyRowException 100% ?
PropertyNotFoundException 100% ?
SheetMagicException 100% ?
ValidationException 100% ?
Extended<T> 50%
Extensions.Attributes 100%
MagicSpreadsheet 73.6%
Options 100% ?
TableOptions 77.7%

Dependency Management

Current Dependencies

Package Version Notes
DocumentFormat.OpenXml [2.20.0,3.0.0) Version range - consider pinning
Nerdbank.GitVersioning 3.9.50 Up to date
BenchmarkDotNet 0.14.0 Added for benchmarking

Recommendations

  1. Consider updating DocumentFormat.OpenXml to v3.x (breaking changes)
  2. Add Dependabot for automated updates

Commands Reference

# Run tests with coverage
dotnet test --collect:"XPlat Code Coverage" --settings coverlet.runsettings --results-directory ./TestResults

# Generate coverage report (text)
reportgenerator -reports:"./TestResults/**/coverage.cobertura.xml" -targetdir:"./TestResults/CoverageReport" -reporttypes:"TextSummary"

# Generate coverage report (HTML)
reportgenerator -reports:"./TestResults/**/coverage.cobertura.xml" -targetdir:"./TestResults/CoverageReport" -reporttypes:"Html"

# Fix formatting issues
dotnet format

# Check formatting without fixing
dotnet format --verify-no-changes

# Build with all analyzers
dotnet build --no-incremental

# Run benchmarks
dotnet run -c Release --project PanoramicData.SheetMagic.Benchmarks

# Publish to NuGet
.\Publish.ps1

Files Added/Modified

Phase 1

File Purpose
coverlet.runsettings Code coverage configuration
.codacy.yaml Codacy analysis configuration
IMPROVEMENTS.md This improvement plan
PanoramicData.SheetMagic.csproj Added README to package
PanoramicData.SheetMagic.Test.csproj Added coverlet.collector
PanoramicData.SheetMagic.Test\ExceptionTests.cs Exception class tests
PanoramicData.SheetMagic.Test\OptionsTests.cs Options/CustomTableStyle/TableRowStyle tests
PanoramicData.SheetMagic.Test\EmptyRowHandlingTests.cs Empty row scenario tests
PanoramicData.SheetMagic.Test\GlobalUsings.cs Global using statements
PanoramicData.SheetMagic\GlobalUsings.cs Global using statements
PanoramicData.SheetMagic\TableRowStyle.cs Fixed Color type ambiguity

Phase 3

File Purpose
PanoramicData.SheetMagic.Benchmarks\PanoramicData.SheetMagic.Benchmarks.csproj Benchmark project
PanoramicData.SheetMagic.Benchmarks\Program.cs Benchmark entry point
PanoramicData.SheetMagic.Benchmarks\SpreadsheetBenchmarks.cs Benchmark tests
PanoramicData.SheetMagic\*.cs XML documentation added to all public APIs