API reference: Swift Testing framework. @Test, @Suite, #expect, #require, traits, parameterized tests, migrating from XCTest.

Swift Testing Reference Apple's modern testing framework ( import Testing ) for iOS 26+. Downloaded Reference Files File Content [testing overview.md](testing overview.md) Full Testing framework index [defining tests.md](defining tests.md) Defining test functions with @Test [organizing tests.md](organizing tests.md) Organizing tests with @Suite [expectations.md](expectations.md) expect, require, confirmations [parameterized testing.md](parameterized testing.md) Parameterized test patterns [traits.md](traits.md) Test traits (tags, conditions, time limits) [migrating from xctest.md](migrating from xctest.md) Migration guide from XCTest Fetching More Docs 1. Search this skill's local .md files first. 2. If the topic is not here, check the other installed Apple skills you have available by their names, descriptions, or SKILL.md frontmatter, then grep their local files. This is faster and uses less context than fetching new docs from the internet. 3. If no installed skill has the page, use the relevant documentation path from testing overview.md with the sosumi.ai Markdown mirror. For example, /documentation/testing/test maps to https://sosumi.ai/documentation/testing/test .

swift-testing