Technologies›Area 19

Developer Tools & Diagnostics

20 frameworks

The Developer Tools & Diagnostics area provides the frameworks you use to validate, measure, and debug your software across Apple platforms. Its frameworks let you write and run unit, performance, and UI tests, attach rich values and images to test results, and exercise App Intents and intelligence-powered features in isolation. They also collect on-device performance, power, and crash diagnostics, read unified logging entries, and capture and symbolicate runtime backtraces for analysis.

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Testing27 types

Swift Testing library: define tests and record attachable values that can be saved as part of a test run.

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Write and run unit, performance, and UI tests with assertions, expectations, and asynchronous waiting for Apple platforms.

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MetricKit94 types

Collects on-device performance and power metrics plus diagnostic reports (crashes, hangs, launches) for app developers.

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Read and inspect unified logging entries from the log store: activities, boundaries, log levels, and process payloads.

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AppIntentsTesting18 types

Test harness for App Intents that exercises intents, entities, and queries in unit tests without the live system.

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CrashReportExtension5 types

Framework for creating crash reporter extensions that capture and analyze binary images, exception details, and process crash context.

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DeveloperToolsSupport15 types

Supplies resource types (colors, images) and previews support for Xcode developer tooling and generated asset symbols.

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Evaluations41 types

Systematically evaluate intelligence-powered features with datasets, model-response generation, metrics, and model-as-judge scoring over Foundation Models.

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ExceptionHandling1 types

Legacy NSExceptionHandler facility for catching, logging, and handling exceptions and runtime errors.

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JavaScriptCore11 types

Evaluate JavaScript and bridge between Swift/Objective-C and JS values, contexts, and objects via the WebKit JS engine.

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Open Scripting Architecture support for compiling, executing, and managing AppleScript and other OSA scripting languages.

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Captures and symbolicates backtraces and inspects the process address space for runtime diagnostics.

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StateReporting3 types

Metadata reporting framework for instruments with macros to synthesize ReportableMetadata conformance from stored properties.

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XCUIAutomation22 types

UI automation API exposing accessibility elements, queries, and interactions for UI testing.

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_Testing_AppKit overlay

Swift Testing support for AppKit, adding attachment encoding of NSImage representations into test image formats.

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_Testing_CoreGraphics overlay

Swift Testing cross-import overlay for CoreGraphics, enabling images to be attached to tests via attachable image formats.

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_Testing_CoreImage overlay

Swift Testing support for Core Image, adding attachment/encoding helpers to capture CIImage representations in tests.

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_Testing_CoreTransferable overlay

Cross-import overlay adding Swift Testing support for CoreTransferable types.

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_Testing_Foundation overlay

Swift Testing support for Foundation types: encode Encodable attachments via property list or JSON encoders.

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_Testing_UIKit overlay

Swift Testing integration for UIKit, making UIImage attachable as an image in test results.

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