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import Foundation
import XCTest
extension XCTestCase {
func loadSource(at relativePath: String) throws -> String {
let currentFile = URL(fileURLWithPath: #filePath)
let repositoryRoot = currentFile.deletingLastPathComponent().deletingLastPathComponent()
let fileURL = repositoryRoot.appendingPathComponent(relativePath)
return try String(contentsOf: fileURL, encoding: .utf8)
}
// swiftlint:disable:next cyclomatic_complexity
func extractFunction(named signature: String, from source: String) throws -> String {
guard let signatureRange = source.range(of: signature) else {
throw NSError(domain: "SourceAnalysisTests", code: 1)
}
guard let openingBrace = source[signatureRange.upperBound...].firstIndex(of: "{") else {
throw NSError(domain: "SourceAnalysisTests", code: 2)
}
let characters = Array(source)
let startOffset = source.distance(from: source.startIndex, to: signatureRange.lowerBound)
var currentOffset = source.distance(from: source.startIndex, to: openingBrace)
var braceDepth = 0
var inLineComment = false
var blockCommentDepth = 0
var inString = false
var isEscaped = false
while currentOffset < characters.count {
let current = characters[currentOffset]
let next: Character? = currentOffset + 1 < characters.count ? characters[currentOffset + 1] : nil
if inLineComment {
if current == "\n" {
inLineComment = false
}
currentOffset += 1
continue
}
if blockCommentDepth > 0 {
if current == "/", next == "*" {
blockCommentDepth += 1
currentOffset += 2
continue
}
if current == "*", next == "/" {
blockCommentDepth -= 1
currentOffset += 2
continue
}
currentOffset += 1
continue
}
if inString {
if isEscaped {
isEscaped = false
} else if current == "\\" {
isEscaped = true
} else if current == "\"" {
inString = false
}
currentOffset += 1
continue
}
if current == "/", next == "/" {
inLineComment = true
currentOffset += 2
continue
}
if current == "/", next == "*" {
blockCommentDepth = 1
currentOffset += 2
continue
}
if current == "\"" {
inString = true
currentOffset += 1
continue
}
if current == "{" {
braceDepth += 1
} else if current == "}" {
braceDepth -= 1
if braceDepth == 0 {
let endIndex = source.index(source.startIndex, offsetBy: currentOffset + 1)
let startIndex = source.index(source.startIndex, offsetBy: startOffset)
return String(source[startIndex..<endIndex])
}
}
currentOffset += 1
}
throw NSError(domain: "SourceAnalysisTests", code: 3)
}
// swiftlint:disable:next cyclomatic_complexity
func strippingCommentsAndStrings(from source: String) -> String {
let characters = Array(source)
var result: [Character] = []
result.reserveCapacity(characters.count)
var currentOffset = 0
var inLineComment = false
var blockCommentDepth = 0
var inString = false
var isEscaped = false
while currentOffset < characters.count {
let current = characters[currentOffset]
let next: Character? = currentOffset + 1 < characters.count ? characters[currentOffset + 1] : nil
if inLineComment {
if current == "\n" {
inLineComment = false
result.append("\n")
} else {
result.append(" ")
}
currentOffset += 1
continue
}
if blockCommentDepth > 0 {
if current == "/", next == "*" {
blockCommentDepth += 1
result.append(" ")
result.append(" ")
currentOffset += 2
continue
}
if current == "*", next == "/" {
blockCommentDepth -= 1
result.append(" ")
result.append(" ")
currentOffset += 2
continue
}
result.append(current == "\n" ? "\n" : " ")
currentOffset += 1
continue
}
if inString {
if isEscaped {
isEscaped = false
} else if current == "\\" {
isEscaped = true
} else if current == "\"" {
inString = false
}
result.append(current == "\n" ? "\n" : " ")
currentOffset += 1
continue
}
if current == "/", next == "/" {
inLineComment = true
result.append(" ")
result.append(" ")
currentOffset += 2
continue
}
if current == "/", next == "*" {
blockCommentDepth = 1
result.append(" ")
result.append(" ")
currentOffset += 2
continue
}
if current == "\"" {
inString = true
result.append(" ")
currentOffset += 1
continue
}
result.append(current)
currentOffset += 1
}
return String(result)
}
func tokenCount(matching pattern: String, in source: String) -> Int {
guard let regex = try? NSRegularExpression(pattern: pattern) else { return 0 }
let range = NSRange(source.startIndex..<source.endIndex, in: source)
return regex.numberOfMatches(in: source, range: range)
}
}
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