4) macros
       should throw a diagnostic when a macro cannot be resolved:

      AssertionError [ERR_ASSERTION]: Expected values to be loosely deep-equal:

[
  {
    codeFrames: [
      {
        codeHighlights: [
          {
            end: {
              column: 57,
              line: 1
            },
            message: undefined,
            start: {
              column: 1,
              line: 1
            }
          }
        ],
        filePath: 'D:\\a\\parcel\\parcel\\packages\\core\\integration-tests\\test\\macros\\13\\index.js'
      }
    ],
    hints: null,
    message: 'Error loading macro: Could not resolve module "./macro.js" from "D:\\...

should loosely deep-equal

[
  {
    codeFrames: [
      {
        codeHighlights: [
          {
            end: {
              column: 57,
              line: 1
            },
            message: undefined,
            start: {
              column: 1,
              line: 1
            }
          }
        ],
        filePath: 'D:\\a\\parcel\\parcel\\packages\\core\\integration-tests\\test\\macros\\13\\index.js'
      }
    ],
    hints: null,
    message: 'Error loading macro: Could not resolve module "./macro.js" from "D:\\...
      + expected - actual

               "filePath": "D:\\a\\parcel\\parcel\\packages\\core\\integration-tests\\test\\macros\\13\\index.js"
             }
           ]
           "hints": [null]
      -    "message": "Error loading macro: Could not resolve module \"./macro.js\" from \"D:\\\\a\\\\parcel\\\\parcel\\\\packages\\\\core\\\\integration-tests\\\\test\\\\macros\\\\13\\\\index.js\""
      +    "message": "Error loading macro: Could not resolve module \"./macro.js\" from \"D:\\a\\parcel\\parcel\\packages\\core\\integration-tests\\test\\macros\\13\\index.js\""
           "origin": "@parcel/transformer-js"
         }
       ]
      
      at Context.<anonymous> (test\/macros.js:377:14)