If you find yourself in a similar situation, perhaps they can be useful for you too. I think Quibble and Quibble.Xunit will be very useful for us. It makes locating and fixing any problems so much easier. Note that Quibble.Xunit points out the number of differences, where to find them, and what they are. The output from the test run looks like this: What happens when I run it?Īlas, the test fails! Turns out there were a number of tiny issues with the response from our API. Here’s a simple Xunit test for my use case: If the strings do not contain the same JSON content, Quibble.Xunit will throw a JsonAssertException and point you to the differences. It provides a method JsonAssert.Equal that uses Quibble to compare two strings for equality. To this end, I wrote another little library called Quibble.Xunit. opensourcelicenses.txt vIDM 2.9 GA The following copyright statements and licenses apply to various open source software packages (or portions thereof) that are distributed with this VMware Product. If it doesn’t, I want the test to fail with a precise explanation that allows me to figure out what is wrong. What I really want to do is assert that the actual JSON response matches my expectations. Now that I’ve made the tool I was missing, how can I use it to write better tests? Good question. If all you want is a textual description of the differences, you can call JsonStrings.TextDiff instead. Array: when two JSON arrays have different items.īy calling JsonStrings.Diff you get a list of Diff values that you can iterate over and pattern match against.Object: when two JSON objects have differences in their properties.Value: same type but different value, e.g.Quibble distinguishes between four kinds of differences: Basically Quibble gives you a list of the needles it found and their locations in the haystack. It uses JSONPath syntax to point out exactly where in the JSON strings the differences can be found. It takes two text strings, parses them into an internal JSON structure, compares the structures recursively property by property, and returns a list of any differences that it found along the way. To fix this problem I wrote a little JSON diff library called Quibble. Yet I haven’t been able to find any such tool that I can use! Our API runs on. Such a tool should be able to point out exactly the differences (if any) between my expectations and the actual JSON response. But it means I need a tool that understands JSON. This should be easy to do, since JSON is small and well-defined. What I really want to do is to make a comparison of the JSON documents themselves. Either I make a very low-level string comparison that ignores all the structure of JSON documents, or I make a proxy comparison of something I derive from the JSON documents. Should I compare the responses as strings, or should I deserialize them to some other data structures and compare those? Both options operate at wrong levels of abstraction. But exactly how should I do that? How should I carry out the comparison? When I call the API, I get the following response:Īre they equal? Well, they look quite similar, but it’s hard to tell, right? I better check to make sure. It should be easy, right? I just call the API to get the actual response, and compare it with the expected response. How can I verify that the response matches my expectation? The answer is obvious: I can write a test to check.
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In those tests, I typically want to verify that the API returns a JSON response that matches my expectations.įor instance, say I expect the JSON response for given a TV show to look like this: For instance, I write tests for the TV Streaming API that serves JSON to our clients. Resource can be identified by a Uniform Resource Identifier (URI).Ĥ.I work with JSON a lot. It is basically any information, like data, Json, xml, html, file, image, etc. It is for stateless communication between a client(Web, Mobile, Server, etc) and a server.Īn entity, model, or data that you interact with. annotate the test class with annotate the class with order to tell the runner class where the bean definitions come from.In order to define a test class for running in a Spring context, the following have to be done: class SidecarApiNotificationApplicationTests void testLoadAllUsers() How to define a testing class in Spring? You don’t necessarily need spring for unit tests.