max-expects

function visit(node, filename, code) {
  const isExpect = (element) => {
    if (element.astType === "functioncall" &&
      element.functionName &&
      element.functionName.astType === "string" &&
      element.functionName.value === "expect") {
      return true;
    }

    if (element.astType === "functioncall" && element.functionName.astType === "member") {
      return isExpect(element.functionName);
    }

    if (element.astType === "member") {
      return isExpect(element.parent);
    }
    return false;
  }

  // your code here
  if (!filename.includes(".spec.") && !filename.includes(".test.")) return;

  if (node.functionName.astType !== "string") {
    return;
  }

  if (node.functionName.value !== "test" && node.functionName.value !== "it") {
    return;
  }

  if (!node.arguments || !node.arguments.values || node.arguments.values.length !== 2) {
    return;
  }

  const callback = node.arguments.values.length && node.arguments.values[1];

  if (
    callback &&
    callback.value.astType === "functionexpression" &&
    callback.value.content &&
    callback.value.content.elements
  ) {
    const elements = callback.value.content.elements;
    const nbExpect = elements.filter(e => isExpect(e)).length;
    console.log(nbExpect);

    if (nbExpect > 5) {
      const error = buildError(node.functionName.start.line, node.functionName.start.col,
        node.functionName.end.line, node.functionName.end.col,
        "Too many expect()", "WARNING", "BEST_PRACTICE");
      addError(error);
    }
  }

}