google/go-cmp
Go Cmp
go-cmp ist eine Vergleichsbibliothek für Go, die für den Einsatz in Test-Suiten entwickelt wurde. Sie fungiert als rekursives Daten-Differenzierungs- und Assertion-Tool, das bestimmt, ob zwei komplexe Datenstrukturen semantisch gleich sind, anstatt sich auf strikte bitweise Gleichheit zu verlassen.
Die Bibliothek bietet ein Framework zur Definition spezialisierter Vergleichslogik, das es Benutzern ermöglicht, benutzerdefinierte Gleichheits-Overrides für spezifische Typen zu registrieren. Sie enthält Mechanismen zur Verwaltung der Handhabung nicht exportierter Felder während der Traversierung, um Laufzeit-Panics bei Deep-Equality-Checks zu verhindern.
Das System nutzt reflektionsbasierte Wert-Traversierung, um spezifische Diskrepanzen zwischen erwarteten und tatsächlichen Werten zu identifizieren und detaillierte Unterschiede zu liefern, wenn Werte nicht übereinstimmen. Sie unterstützt typspezifisches Gleichheits-Dispatching und konfigurierbares Vergleichsverhalten.
Features
- Recursive Semantic Equality - Determines if two complex data structures are semantically equal by recursively comparing their components.
- Reflection-Based Comparison - Uses Go reflection to recursively walk through complex data structures for deep equality checks.
- Equality Logic Frameworks - Provides a configurable framework for implementing specialized comparison logic and handling unexported fields.
- Unexported Field Access Control - Manages reflection access to unexported fields to prevent runtime panics during deep equality checks.
- Comparison Logic Overrides - Provides a framework for registering custom functions to replace default equality logic for specific types.
- Custom Equality Definitions - Allows the definition of custom comparison functions to handle special cases like floating-point tolerances.
- Recursive Data Diffing - Traverses Go types recursively to identify and produce detailed mismatches between expected and actual values.
- Semantic Value Comparison - Determines if two values are semantically equal by recursively comparing primitive types or applying specialized logic.
- Go Testing Frameworks - Serves as a specialized assertion tool for Go that generates detailed diffs between expected and actual values.
- Private Field Comparison Controls - Provides capabilities to manage whether unexported fields are included in value comparisons during testing.
- Unexported Field Handling - Manages how private struct fields are treated during comparison to prevent panics in Go test suites.
- Value Comparison Libraries - Compares complex Go data structures in tests using semantic equality instead of strict bitwise equality.
- Object Equality Implementations - Supports defining specific equality methods on types to control how their equality is calculated.
- Special Type Equality Handlers - Routes comparison logic to special handlers based on the concrete type of the values.
- Functional Options - Implements the functional options pattern to configure complex comparison settings via variadic functions.
- Custom Assertions - Enables specialized equality rules for types to handle business logic or floating point precision during verification.
- Unit Testing - Facilitates the verification of complex data structures within Go unit tests.
- Testing and QA - Package for comparing Go values in tests.
- Testing and Quality Assurance - Package for deep comparison of Go values.
- Test-Frameworks - Package for comparing Go values in tests.
