Monkey island Definition & Meaning

The tester need not have any technical knowledge and test the application according to their understanding and enter invalid data. It is best used when one wants to perform load testing on an application by providing many random inputs trying to break the application. Let’s dive into this in detail and look at more interesting facts about this technique. Monkey testing can be categorized into smart monkey tests or dumb monkey tests. It may seem a little different to the formal methods you’re used to, but this is what makes it so unique and beneficial to developers and QA engineering teams.

Monkey testing is a software testing technique in which the testing is performed on the system under test randomly. Gorilla testing is a software testing technique that repeatedly applies inputs on a module to ensure it is functioning correctly and that there are no bugs. These tools are developed to generate random data and execute them to the application. Monkey testing isn’t used in the industry as much due to its behavior and fundamental principle of random testing. It is usually preferred when all other methods have already been used. If done, it is advised to assign these to experienced testers to ensure maximum success.

Positive Testing

Ideally, your beta testers should be providing helpful feedback at this stage anyway. Despite this, ad hoc testing is still a great way of unearthing defects during the early stages of your application, ensuring that your software is only released to the end-user once it’s in tip-top shape. A testing technique used to identify the presence of defects monkey testing in a product or software under test using the graphical user interface . Checks for smoke from hardware components once the hardware is powered up. In the context of software testing, it tests the basic functionality of the release. If it fails, the release is declared unstable, and it is no longer tested until the release smoke test passes.

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It is a rigorous manual test to check the robustness of an application. Some smart monkeys are also referred to as brilliant monkeys, which perform testing as per user’s behavior and can specify some probabilities of bugs to be occurred. It’s easy to get caught up in the excitement of it all, but formal testing doesn’t always uncover all the defects.

What are the tools used for monkey testing?

Independent team that participates in non-developer testing activities to avoid author bias. An Agile software development method that focuses on involving customers, being transparent, testing, and frequently delivering working software. Tests performed to determine if the application under test can withstand continuous loads. A set of tests performed on a new build to verify the testability before it is passed to the test team. A project management approach that develops software increments in frequent iterations as requirements change. The smart reporting includes detailed testing results and comprehensive analysis along with actionable triaged defects.

definition of monkey testing

If a UI screen is added to an application, it’s advised you stick with negative testing to bring out as many defects as possible. While ad hoc testing is beneficial, you’ll want to note down all the user related defects you’ll be encountering so you can fix them ASAP. For tests that require an in-depth look at the user’s navigation and usability of your application, you’ll want to document and take notes as much as possible (which is quite far removed from ad-hoc testing). One of the great things about ad hoc testing is that it takes less time than more formal testing methods.

Consider session testing

Candidate experience reflects a person’s feelings about going through a company’s job application process. Netflix engineers plan to add more monkeys to the army, some based on community suggestions. In my current position, I tend to perform exploratory testing that is related to other ad hoc or scripted testing that I currently am doing as mandated by my tasks for the current sprint. Scripted testing is great for regression situations where you need to exercise all of, or the bulk of, functionality of the software in a new version. The tester may not be able to reproduce the bug as this is done so randomly. Here the testers know what they are testing, where they are testing and where will this lead to.

definition of monkey testing

Monkey testing requires lesser time and effort when compared with other kinds of testing. Monkey testing ensures that the software application is reliable and efficient. This condition may alter in the next period of Testing Process, in which case we must consider the forthcoming influence of Monkey testing and its considerable impact on industry norms. This is an introduction lesson for Monkey Testing that covers the fundamentals. In monkey testing, the identified bugs can be out of scope or out of business needs. Evaluate the unexpected issues identified during the monkey testing makes this process very difficult and time-consuming.

Code coverage test

The software simulates failures of instances of services running within Auto Scaling Groups by shutting down one or more of the virtual machines. According to the developers, Chaos Monkey was named for the way it wreaks havoc like a wild and armed monkey set loose in a data center. Exploratory testing is useful during development, particularly when coupled with Agile development.

definition of monkey testing

A test monkey is an automated that simulates a monkey that tests the application in random fashion. The phrase “monkey testing” originally appeared in Glenford J. Myers’ 1979 book “The Art of Software Testing.” It is a well-known practice among software developers. As we know, the gorilla testing is pre-planned whereas the monkey testing is very much Adhoc in nature, and as compared to gorilla testing, we must be muddled many times. The last and third type of monkey testing is brilliant monkey testing. In this type of monkey testing, the test engineer has a good knowledge of the system.


Monkey Testing is very ad-hoc in nature and many a times confused with Gorilla Testing which is pre-planned and strategized. Random testing which is commonly known as Monkey testing, is defined as a testing that deal with random inputs and data. In this process of testing, the random inputs are identified to be evaluated against the system and the tests are selected independently from the test domain. Moreover, the tests are executed using the random inputs, after which the results are recorded and compared against the expected outcomes. In this type of testing, the tester doesn’t know the application or workflow. The tester is directed to test it with random bugs, which can help in naively identifying significant bugs.

  • As we’ve discussed, ad hoc testing is a type of software testing done with no formal testing techniques, requiring no planning or documentation.
  • The tester also known as the dumb monkey in this testing has no idea about the flow of work or the required data that needs to be fed to the application in an ideal environment.
  • After all, you’ve run your formal tests and nothing looks out of the ordinary – no bugs, no errors, no faults.
  • The setup of monkey testing is easy, therefore good for any application.

The randomness of monkey testing often makes the bugs found difficult or impossible to reproduce. Unexpected bugs found by monkey testing can also be challenging and time consuming to analyze. In some systems, monkey testing can go on for a long time before finding a bug.

Software Testing

Moreover, testing is the best way of finding bugs and defects in the software as well as to resolve them as soon as they are detected by the team of testers. Monkey Testing/Random Testing, is a type of software testing, which was mentioned for the first time in the book The Art of Software Testing by Glenford J. Myers in 1979. The tester has full knowledge of the application and is specifically deployed because they have domain knowledge about the application and can even identify some bugs that might be found in the future. Since the tester knows about the product, they can perform testing from a user’s viewpoint. Monkey Testing is a technique as the name suggests that simulates a monkey on the System under test. In this type of testing, the tester tests the application with random inputs and random use cases and checks the behavior of the application.

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