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Provides an expert Spring Boot 4 testing guide that explains the test pyramid, slice annotations, AssertJ-centric assertions, MockMvcTester, RestTestClient, Testcontainers, and practical coverage goals.

This skill systematically reviews test code to identify and correct common anti-patterns. It detects issues such as flaky tests, overly mocked dependencies (over-mocking), brittle assertions, excessive test size (The Giant), and structural dependencies. It explains the flaw, provides best practices, and suggests refactored, reliable implementations, helping maintain high test quality and stability.

A comprehensive guide for writing and reviewing robust, behavior-first unit tests for Vue 3, TypeScript, and Pinia stores. This skill covers advanced patterns for testing components, composables, and state management using Vitest and Vue Test Utils, emphasizing black-box assertions and minimizing implementation coupling.

This guide details migrating outdated and unsafe `as` type assertions in TypeScript test files. It introduces `@total-typescript/shoehorn`, which provides type-safe functions like `fromPartial()` and `fromAny()`. Use this utility when unit tests need to mock large objects or pass only a subset of required data, thereby maintaining strict type checking and improving test robustness. Note: This is strictly for test code.

This skill provides a comprehensive playbook for testing the security of SAML-based Single Sign-On (SSO) solutions. It focuses on validating assertion trust by checking signature coverage, audience and recipient restrictions, handling of Assertion Consumer Service (ACS), and identifying potential XML parsing weaknesses or IdP/SP confusion flaws. Use this when evaluating enterprise authentication systems for critical security vulnerabilities.

This skill automates end-to-end (E2E) functional testing for Android applications. It parses an XML specification defining a multi-step user 'journey.' The executor sequentially performs interactive UI actions (taps, swipes, text input) using ADB commands and verifies application states through assertions. It outputs a detailed, standardized JSON report, making it ideal for robust CI/CD integration and quality assurance.