 
       if let output = outputs[testCase.key] {
         let expectation = TextFile(path: output)
-        XCTAssertLinesEqual(testResult.storage, try! expectation.read())
+        XCTAssertLinesEqual(testResult.storage, try! expectation.read(), path: testCase.value)
       } else {
         let outputPath = Path(pathname: String(testCase.value.pathname.dropLast(6)) + ".output")
         let expectation = TextFile(path: outputPath)
         try! expectation.write(testResult.storage)
-        print("⚠️ no oracle for '\(testCase.value.filename!)', regression test case created now")
+        print("⚠️  no oracle for '\(testCase.value.filename!)', regression test case created now")
       }
     }
   }


}

private func XCTAssertLinesEqual(_ lhs: String, _ rhs: String) {
  let lhsLines = lhs.split(separator: "\n")
  let rhsLines = rhs.split(separator: "\n")


  }

  guard errors.isEmpty else {
    XCTFail("⚠️  \(path.filename!)")
    for (lineno, ll, rl) in errors {
      print("  L\(lineno) | expected: " + ll.trimmingCharacters(in: [" "]).styled("green"))
      print("  L\(lineno) | actual  : " + rl.trimmingCharacters(in: [" "]).styled("red"))
    }
    return
  }

  guard lhsLines.count == rhsLines.count else {
    XCTFail("⚠️  \(path.filename!): different line count")
    return
  }
}
