![]() ![]() The JavaScript pm.response.json() is the syntax that allows us to parse the JSON response from our API. pm.expect(pm.response.json()).to.be.an(“array”) An assertion succeeds if the predicate expression returns true. It is also common to use pm.expect(), as in our example here, to write predicate expressions that can be evaluated to a boolean value, i.e., true or false. The second parameter of the pm.test() function is a function where you define the assertions about response data, using a Chai.js BDD syntax like pm.response.to.have.* and pm.response.to.be.* to build your assertions. In the next section, let’s look at the test assertion itself to see what might be failing. The assertion error message corresponds to one assertion written in the Postman test In our example, there’s only one assertion. The assertion error message corresponds to one of the assertions written in the Postman test. Test name: This is the name of the test that corresponds to the test written under the Tests section of the request.Īssertion error: If there is an error resulting from the test specifications, the error message is displayed following the test name and a pipe symbol (|).In our example, the “My Best Test” test has failed and the label is colored red with the text “FAIL.” Test status: This label indicates whether the test has passed or failed.The test result is composed of the following elements. Let’s look at the failing test called “My Best Test” in the Test Results section of Postman. In the next section, let’s look at the failing test to see what’s happening. ![]() In this example, we can see the results summarized in the Test Results section. Test specifications is highlighted as the second parameter in the pm.test() method Identify the test by name in the Test Results section You can also use pm.response.to.have.* and pm.response.to.be.* to build your assertions. If you use multiple assertions this way, the test will stop executing as soon as any assertion fails and the remaining assertions will not execute. Your tests can include multiple assertions as part of a single test to group related assertions. Test specifications: The second parameter is a function where you define the assertions on response data, using a readable Chai.js BDD syntax like the pm.expect() function.Name of the test is highlighted as the first parameter in the pm.test() method This helps you identify the test in the Test Results section and also communicates the test’s purpose to the consumers of your collection. Test name: The first parameter is a string representing the name of the test.The method accepts the following two parameters. Tests written under the Tests section correspond to the Test Results sectionĪ test in Postman is defined by the pm.test() method that lets you add instructions for your assertions or expectations. In the bottom panel is where you will see your results. This is where you’ll write your tests in JavaScript in the top panel. Go to the request builder in the Postman interface, and find the Tests tab. These types of tests confirm that your API is working as expected, that integrations between services are functioning reliably, and that any changes haven’t broken existing functionality. In addition to exploratory testing, you can also write tests in Postman to make assertions about your APIs. Lots of people use Postman to test their APIs. Debug and troubleshoot unexpected behavior.Read on to learn more about the following topics regarding Postman tests: It’s also important to know what is being tested and why a test fails, so you can troubleshoot and debug unexpected API behavior. When you review API test results in Postman, you want to know if the tests pass or fail.
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