text: var tape = require("tape"),
      HttpError = require("..");
  
  
  tape("HttpError(statusCode, message[, fileName[, lineNumber]])", function(assert) {
      var error = new HttpError(404);
  
      assert.equals(error instanceof Error, true);
      assert.equals(error.name, "NotFoundError");
      assert.equals(error.statusCode, 404);
      assert.equals(error.message, "NotFoundError: 404 Not Found");
  
      assert.end();
  });
  