When working with Postman to automate API testing, you might encounter scenarios where you want to conditionally skip the execution of subsequent requests in a collection. This can be useful if a certain condition isn't met in your API responses. Here's a guide on how to achieve this using Postman's scripting capabilities.
Scenario
Imagine you have a collection where the first request returns a response like this:
{
"content": "True",
"statusCode": 200,
"message": "Global value got from DbConfig!"
}
You want to skip all subsequent requests if the content field is "False".
Step-by-Step Guide
-
Set Up Your Collection: Ensure your collection is organized with the request you want to evaluate placed at the beginning.
-
Write a Post-Request Script: In the test script section of the first request, you'll write a script to check the content field and decide whether to continue the collection run.
// Parse the response
let response = pm.response.json();
// Check the content value
if (response.content === "False") {
pm.execution.setNextRequest(null); // Skip the remaining requests
}
This script checks if the content is "False". If it is, pm.setNextRequest(null) stops all subsequent requests from running.
-
Test the Flow: Run your collection to see the logic in action. If the condition is met (i.e., content is "False"), the collection run will halt after the first request.
Explanation
pm.response.json(): This method parses the JSON response from your request.pm.setNextRequest(null): This function is used to stop further requests in the collection run. If the condition isn't met, the collection continues with all remaining requests in their original order.
Benefits
- Efficiency: Avoid unnecessary API calls when certain conditions aren’t met, saving time and resources.
- Control: Gain greater control over your testing workflows by dynamically determining execution paths.
Conclusion
Using pm.execution.setNextRequest(null) in a test script provides a straightforward way to control the flow of your Postman collection runs based on specific conditions in your API responses. This technique can be a powerful tool in optimizing your automated testing processes.
Feel free to customize the logic to fit your specific needs!
一个朋友说 Gemini最近的进步已经挺大了，于是我就试验了一下。
我问Gemini：你能否用简洁的汉语详细解释一下import { ref, onMounted, watch } from 'vue'这一语句import的这三个对象？它们是什么，做什么用，好的实践是什么？
Gemini的回答令我非常满意，因此我把它发表在这里。它的回答是：
好的，我来详细解释一下这段代码中导入的三个对象：
import { ref, onMounted, watch } from 'vue'
解释：
-
import：
- 这是 JavaScript 中的导入语句，用于从其他模块（这里就是 Vue.js）中引入需要的功能。
- 想象一下，你在搭建积木，
import 就相当于你从积木盒里拿出特定的积木块。
-
ref, onMounted, watch：
-
这些都是 Vue.js 提供的三个核心功能：
-
ref：
- 作用： 创建一个响应式的引用。
- 比喻： 想象一个盒子，你把一个数据放进去，这个盒子就变成了一个
ref。当盒子里面的数据发生变化时，Vue 会自动追踪到，并触发相应的更新。
- 使用场景： 用于创建响应式的基本数据，比如一个计数器、一个输入框的值等。
-
onMounted：
- 作用： 在组件挂载到 DOM 后执行一次回调函数。
- 比喻： 就像一个新房子建好了，你就可以搬进去开始装修了。
onMounted 就是在你搬进去之后执行的第一个动作，比如打开窗户通风。
- 使用场景： 用于执行一些初始化操作，比如获取数据、设置定时器等。
-
watch：
- 作用： 监听一个值的改变，并在值改变时执行回调函数。
- 比喻： 就像你设置了一个监控摄像头，一旦监控到有物体移动，就会触发报警。
watch 就是这个监控摄像头，它会持续监控一个值，一旦值发生变化，就会执行你设定的操作。
- 使用场景： 用于实现一些复杂的逻辑，比如根据数据的变化动态更新视图、进行表单验证等。
总结：
ref 用于创建响应式数据。onMounted 用于在组件挂载后执行初始化操作。watch 用于监听数据的变化并执行相应的操作。
好的实践：
- 合理使用 ref： 不要过度使用
ref，只对需要响应式的数据进行包裹。
- 在 onMounted 中进行异步操作： 将获取数据、设置定时器等异步操作放在
onMounted 中，确保组件已经挂载到 DOM 中。
- watch 的使用场景：
watch 更适合监听复杂逻辑或需要深度比较的情况。对于简单的计算属性，可以使用 computed。
示例：
import { ref, onMounted, watch } from 'vue'
const count = ref(0)
onMounted(() => {
// 在组件挂载后获取数据
fetch('/api/data')
.then(response => response.json())
.then(data => {
// 更新数据
count.value = data.count
})
})
watch(count, (newValue, oldValue) => {
console.log('count has changed:', newValue, oldValue)
})
更深入的学习：
如果你想更深入地了解这些概念，可以参考 Vue.js 的官方文档。
希望这个解释能帮助你更好地理解这三个对象的作用和用法。如果你还有其他问题，欢迎随时提出。
我觉得AI非常善于把概念性的事情用简洁准确的方式说清楚，在这一点上，真可以说它的智慧出于人类而胜于人类了。
The error occurs because AppBar expects a widget that implements the PreferredSizeWidget interface, but Consumer<NoteModel> does not directly implement this interface. To solve this, you need to return an AppBar from within the Consumer builder method.
Here’s how you can do it:
Scaffold(
appBar: PreferredSize(
preferredSize: Size.fromHeight(kToolbarHeight),
child: Consumer<NoteModel>(
builder: (context, noteModel, child) {
return AppBar(
title: Text(
'Your Title',
style: TextStyle(
color: noteModel.isPrivate ? Colors.red : Colors.green,
),
),
);
},
),
),
body: // Your other widgets,
);
In this approach, I wrapped the Consumer<NoteModel> inside a PreferredSize widget to ensure it adheres to the PreferredSizeWidget interface required by appBar.
This should resolve the error while allowing you to update only the AppBar based on changes in your NoteModel.
Glory to ChatGPT!
In C#, both FirstOrDefault and SingleOrDefault are LINQ methods that operate on collections, but they serve different purposes:
FirstOrDefault
-
Purpose: Returns the first element in a collection that satisfies a specified condition, or the default value for the type if no such element is found.
-
Behavior:
- If the collection contains multiple elements that satisfy the condition, it returns the first one.
- If no elements satisfy the condition, it returns the default value (
null for reference types, 0 for numeric types, etc.).
-
Use Case: When you're interested in getting the first match or a default value if none exist, and you don't care if there are multiple matches.
SingleOrDefault
-
Purpose: Returns the single element in a collection that satisfies a specified condition, or the default value for the type if no such element is found.
-
Behavior:
- If the collection contains exactly one element that satisfies the condition, it returns that element.
- If no elements satisfy the condition, it returns the default value.
- If more than one element satisfies the condition, it throws an
InvalidOperationException because the expectation is that there should be exactly one match.
-
Use Case: When you're expecting either one or zero matches, and multiple matches would indicate an error in your data or logic.
Summary
FirstOrDefault: Use when you want the first matching element or a default value, and multiple matches are acceptable.SingleOrDefault: Use when you expect exactly one matching element or a default value, and multiple matches are an error.
--- a/lib/services/note_tag_service.dart
+++ b/lib/services/note_tag_service.dart
@@ -9,6 +9,5 @@ class NoteTagService {
Future<Map<String, int>> getMyTagCloud() async {
var apiResult = (await _noteTagApi.getMyTagCloud()).data;
if (!apiResult['successful']) throw ApiException(apiResult);
- return apiResult['data'].map((item) => {item['tag'] as String: item['count'] as int});
- }
+ return { for (var item in apiResult['data']) item['tag'] as String : item['count'] as int }; }
+ }