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[5.9] assertMacroExpansion should assert if there are errors #1785

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Merged
merged 1 commit into from
Jun 15, 2023
Merged

[5.9] assertMacroExpansion should assert if there are errors #1785

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23 changes: 20 additions & 3 deletions Sources/SwiftSyntaxMacrosTestSupport/Assertions.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@ import _SwiftSyntaxTestSupport
import SwiftBasicFormat
import SwiftDiagnostics
import SwiftParser
import SwiftParserDiagnostics
import SwiftSyntax
import SwiftSyntaxMacros
import XCTest
Expand Down Expand Up @@ -279,11 +280,27 @@ public func assertMacroExpansion(
let context = BasicMacroExpansionContext(
sourceFiles: [origSourceFile: .init(moduleName: testModuleName, fullFilePath: testFileName)]
)
let expandedSourceFile = origSourceFile.expand(macros: macros, in: context).formatted(using: BasicFormat(indentationWidth: indentationWidth))

let expandedSourceFile = origSourceFile.expand(macros: macros, in: context)
let diags = ParseDiagnosticsGenerator.diagnostics(for: expandedSourceFile)
if !diags.isEmpty {
XCTFail(
"""
Expanded source should not contain any syntax errors, but contains:
\(DiagnosticsFormatter.annotatedSource(tree: expandedSourceFile, diags: diags))

Expanded syntax tree was:
\(expandedSourceFile.debugDescription)
""",
file: file,
line: line
)
}

let formattedSourceFile = expandedSourceFile.formatted(using: BasicFormat(indentationWidth: indentationWidth))
assertStringsEqualWithDiff(
expandedSourceFile.description.trimmingTrailingWhitespace().trimmingCharacters(in: .newlines),
expandedSource.trimmingTrailingWhitespace().trimmingCharacters(in: .newlines),
formattedSourceFile.description.trimmingCharacters(in: .newlines),
expandedSource.trimmingCharacters(in: .newlines),
additionalInfo: """
Actual expanded source:
\(expandedSource)
Expand Down