Getting started with postman -- built-in dynamic parameters, custom parameters and assertions

One 、postman Built in dynamic parameters and custom dynamic parameters

1、 Built in dynamic parameters

{ {$timestamp}} Generate current timestamp
{ {$randomInt}} Generate 0~1000 random number
{ {$guid}} Generate a GUID Long string random number

2、 Custom dynamic parameters

stay Pre-request Script Define parameters in , Then set it as a global variable , And can realize custom dynamic parameters , For example, create a user tag interface , Except for access_token Outside , Transmitted name Value cannot be duplicate , At this time, we can use { {$timestamp}} Outside the timestamp tag 【 Be careful , This is a little bad , We don't know that the timestamp is in advance , There are drawbacks in making assertions 】 You can also use custom dynamic parameters .

adopt

Defined a times Variable . The method of calling custom variables is { { Variable name }}, There is no need to add the dollar sign .

Two 、postman General assertion 、 Dynamic parameter assertion 、 Global assertion

The assertion should be written in Tests In the TAB. ,postman Many assertion methods have been provided to us , It's all on the right

Call directly when using , For example, we are getting access_token The interface makes the following assertions

The first is the status code 200;

The second assertion is that the returned string contains access_token character string

stay Tests Tab cannot be passed { { Variable name }} Method to call global variables , Only through ：

1）postman Its own method of obtaining global variables pm.global.get(" Variable name ") First get , Call again

2）globals[" Variable name "]

3）globals. Variable name

Call in the above three ways

Whether the assertion passes , Will be in Test Results It shows that

Like the status code is 200 This assertion should be the assertion that every use case should make , But if every use case is written once, it's a little bit like Automation , At this time, you can make a global assertion , That is, every use case will judge

for example , We didn't write any assertions in the query tag , But the status code will be carried out after execution 200 The judgment of the ：

The first is the status code 200;

The second assertion is that the returned string contains access_token character string

stay Tests Tab cannot be passed { { Variable name }} Method to call global variables , Only through ：

1）postman Its own method of obtaining global variables pm.global.get(" Variable name ") First get , Call again

2）globals[" Variable name "]

3）globals. Variable name

Call in the above three ways

Whether the assertion passes , Will be in Test Results It shows that

Like the status code is 200 This assertion should be the assertion that every use case should make , But if every use case is written once, it's a little bit like Automation , At this time, you can make a global assertion , That is, every use case will judge

for example , We didn't write any assertions in the query tag , But the status code will be carried out after execution 200 The judgment of the ：

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