chore: update default configuration values

README.md

@@ -6,9 +6,24 @@
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=deploy-on-friday-swift-mutation-testing&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=deploy-on-friday-swift-mutation-testing)
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=deploy-on-friday-swift-mutation-testing&metric=coverage)](https://sonarcloud.io/summary/new_code?id=deploy-on-friday-swift-mutation-testing)
 
-**Find untested behaviour in Swift codebases.**
+**Measure and improve test effectiveness in Swift codebases using mutation testing.**
 
-`swift-mutation-testing` is a CLI for mutation testing of Xcode + XCTest projects. It modifies your source code in small, targeted ways — mutations — and runs your test suite against each one. A mutation that goes undetected means a test is missing or an assertion is too weak. The result is a mutation score that measures how effectively your tests catch real bugs.
+`swift-mutation-testing` is a CLI for mutation testing of Xcode + XCTest projects. It modifies your source code in small, targeted ways — mutations — and runs your test suite against each one. A mutation that goes undetected reveals missing tests or weak assertions. The result is a mutation score that reflects how effectively your tests catch real bugs.
+
+## Why
+
+Traditional test coverage does not guarantee that tests catch real bugs.
+
+Mutation testing introduces controlled changes to your code to verify that your tests fail when behavior changes. Surviving mutations indicate gaps in test effectiveness.
+
+## Features
+
+- Mutation testing for Xcode + XCTest projects
+- Measures test effectiveness through mutation score
+- Supports multiple mutation operators
+- Provides detailed reports per file and mutation
+- Configurable via YAML
+- Can be integrated into CI pipelines
 
 ## Install
 

Sources/SwiftMutationTesting/CLI/HelpText.swift

@@ -13,7 +13,7 @@ enum HelpText {
           --scheme <scheme>             Xcode scheme to build and test (required)
           --destination <destination>   xcodebuild destination specifier (required)
           --target <test-target>        Test target name
-          --timeout <seconds>           Per-mutant test timeout in seconds (default: 60)
+          --timeout <seconds>           Per-mutant test timeout in seconds (default: 120)
           --concurrency <n>             Number of parallel test workers (default: CPUs - 1)
           --no-cache                    Disable the result cache
           --output <json-path>          Write mutation report JSON to path

Sources/SwiftMutationTesting/Configuration/ConfigurationFileWriter.swift

@@ -42,19 +42,19 @@ struct ConfigurationFileWriter: Sendable {
         }
 
         lines.append("")
-        lines.append("# Per-mutant test timeout in seconds (default: 60)")
-        lines.append("timeout: 60")
+        lines.append("# Per-mutant test timeout in seconds (default: 120)")
+        lines.append("timeout: 120")
         lines.append("")
         lines.append("# Number of parallel workers (default: max(1, CPU count - 1))")
-        lines.append("# concurrency: 4")
+        lines.append("concurrency: 4")
         lines.append("")
         lines.append("# Disable result cache (re-runs all mutants on every execution)")
         lines.append("# noCache: true")
         lines.append("")
         lines.append("# Report output paths")
         lines.append("# output: mutation-report.json")
         lines.append("# htmlOutput: mutation-report.html")
-        lines.append("# sonarOutput: sonar-report.json")
+        lines.append("sonarOutput: sonar-mutation-report.json")
         lines.append("")
         lines.append("# Source file glob patterns to exclude from mutation")
 

Sources/SwiftMutationTesting/Configuration/RunnerConfiguration.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 struct RunnerConfiguration: Sendable {
-    static let defaultTimeout: Double = 60.0
+    static let defaultTimeout: Double = 120.0
     static let defaultConcurrency: Int = max(1, ProcessInfo.processInfo.processorCount - 1)
 
     let projectPath: String

Tests/SwiftMutationTestingTests/Unit/Configuration/ConfigurationFileWriterTests.swift

@@ -89,8 +89,8 @@ struct ConfigurationFileWriterTests {
         try writer.write(to: dir.path, project: .empty)
 
         let values = try ConfigurationFileParser().parse(at: dir.path)
-        #expect(values["timeout"] == "60")
-        #expect(values["concurrency"] == nil)
+        #expect(values["timeout"] == "120")
+        #expect(values["concurrency"] == "4")
     }
 
     @Test("Given multiple schemes detected, when write called, then available schemes comment is included")

sonar-project.properties

@@ -1,7 +1,7 @@
 # Project identification
 sonar.projectKey=deploy-on-friday-swift-mutation-testing
 sonar.projectName=Swift Mutation Testing
-sonar.projectDescription=Find untested behaviour in Swift codebases.
+sonar.projectDescription=Measure and improve test effectiveness in Swift codebases using mutation testing.
 sonar.organization=deploy-on-friday
 
 # Source code