A tiny Swift library that simplifies testing Swift macros by driving SwiftSyntaxMacrosTestSupport with file-based fixtures. It provides a single helper, MacroTester.testMacro, which loads your input and expected output from disk and asserts the expansion matches.

• Derives a test name from the calling test function (eg. add3And7() → add3And7).
• Looks up fixtures next to your test file at Resources/<TestName>/Input.swift.test and Resources/<TestName>/Output.swift.test.
• Calls assertMacroExpansion from SwiftSyntax to compare the macro expansion to your expected output.