json - 尝试检查 JSON 字段值是否不为空或未定义时邮递员测试错误

Question

我正在尝试在 Postman 中为 GET 请求创建一个测试，以检查存储在每个对象的 'name' 字段中的值是否不同于null和undefined，但我收到以下消息“TypeError: Cannot read property 'name ' of undefined" 这是我正在使用的 JSON 主体的示例：

[
{
 "id":1,
 "name": "Peter"
},
{
 "id":2,
 "name":"Stewie" 
},
{
 "id":3,
 "name":"Brian"
}
]

这是测试的JS代码：

pm.test(``, function(){ 
    var response = JSON.parse(responseBody)
    var result = true

    for (i=0;i<=response.length;i++){ 
    if(!response[i].name){
     result = false}
    }
    pm.expect(result).to.eql(true)
});

我尝试过的事情：

1. var jsonData = pm.response.json(); 使用而不是 获取 JSON 正文 var response = JSON.parse(responseBody)
2. 对IF语句 使用以下条件：!response[i]['name']
3. 将“名称”值存储在全局变量中，如下所示：

    pm.test(``, function(){ 
        var response = JSON.parse(responseBody)
        var result = true
    
        for (i=0;i<=response.length;i++){ 
         pm.globals.set("variable_name", response[i]['name'];
         var name = pm.globals.get("variable_name");
        if(!name){
         result = false}
        }
        pm.expect(result).to.eql(true)
       });

谢谢！

标签： jsontestingpostman

Answer 1

它是一个超出索引错误的数组，您正在检查 i 直到它等于 response.lenght

所以最后一个值将是 response[response.length] ，没有元素最后一个元素是 response[response.length-1] 。所以只需从 for 循环中删除 equal

pm.test(``, function(){ 
    var response = JSON.parse(responseBody)
    var result = true

    for (i=0;i<response.length;i++){ 
    if(!response[i].name){
     result = false}
    }
    pm.expect(result).to.eql(true)
});

但正确的做法是做模式valdiaiton：

let schema = {
    "$schema": "http://json-schema.org/draft-07/schema",
    "$id": "http://example.com/example.json",
    "type": "array",
    "title": "The root schema",
    "description": "The root schema comprises the entire JSON document.",
    "default": [],
    "examples": [
        [
            {
                "id": 1,
                "name": "Peter"
            },
            {
                "id": 2,
                "name": "Stewie"
            }
        ]
    ],
    "additionalItems": true,
    "items": {
        "$id": "#/items",
        "anyOf": [
            {
                "$id": "#/items/anyOf/0",
                "type": "object",
                "title": "The first anyOf schema",
                "description": "An explanation about the purpose of this instance.",
                "default": {},
                "examples": [
                    {
                        "id": 1,
                        "name": "Peter"
                    }
                ],
                "required": [
                    "id",
                    "name"
                ],
                "properties": {
                    "id": {
                        "$id": "#/items/anyOf/0/properties/id",
                        "type": "integer",
                        "title": "The id schema",
                        "description": "An explanation about the purpose of this instance.",
                        "default": 0,
                        "examples": [
                            1
                        ]
                    },
                    "name": {
                        "$id": "#/items/anyOf/0/properties/name",
                        "type": "string",
                        "title": "The name schema",
                        "description": "An explanation about the purpose of this instance.",
                        "default": "",
                        "examples": [
                            "Peter"
                        ]
                    }
                },
                "additionalProperties": true
            }
        ]
    }
}


pm.test("Status code is 200", function () {
     pm.response.to.have.jsonSchema(schema);
});

您可以使用以下方式生成架构：https ://jsonschema.net/home

名称为 null 时的邮递员输出：