#api-testing #testing #testing-tools #tool #cli-tool #env-var

app jikken

Jikken is a CLI tool for automated API testing. It utilizes JKT files (Jikken Test Definitions) to execute jobs for testing REST APIs. It has first-class support on Windows, macOS, and Linux. Visit jikken.io for more info

9 releases (breaking)

new 0.7.0 Apr 3, 2024
0.6.2 Mar 8, 2024
0.6.1 Jan 15, 2024
0.5.0 Apr 16, 2023
0.1.0 Dec 31, 2022

#128 in Development tools

Download history 5/week @ 2024-01-08 13/week @ 2024-01-15 9/week @ 2024-02-26 162/week @ 2024-03-04 20/week @ 2024-03-11 333/week @ 2024-04-01

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MIT license

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GitHub release (latest by date) Crates.io Chocolatey Homebrew Formula

jikken (jk)

Jikken is a powerful REST API testing toolkit that is source control friendly. This project is currently in early beta.

The goal of this project is to provide a CLI tool that can be used for automated API testing. The tests are defined in a YAML/JSON format. The design is intended to be simple for common scenarios, but provide a rich featureset to enable complex ones. The current focus is to enable smoke and regression testing (data validation), but in time we plan to add features to enable performance testing as well.


Release history can be viewed in the CHANGELOG.


For more complete documentation checkout our website: Jikken.io.


The binary name for jikken is jk.

We plan on adding wider support across differing platforms and package managers, but for the time being we provide binaries for MacOS, Linux, and Windows. You can download the prebuilt binaries here: Releases.

If you use macOS Homebrew or Linuxbrew you can install by adding our tap and brew installing.

$ brew tap jikkenio/jikken
$ brew install jikken

If you are a Rust developer you can install from crates.io using cargo.

$ cargo install jikken

or directly from the repository using cargo's git flag.

$ cargo install --git http://www.github.com/jikkenio/jikken

If you use chocolatey you can install it from the community repository.

$ choco install jikken

If you would like to manually install from source, cargo is still your best bet. All you need to do is git clone the repo and then cargo install from the repo directory.

$ git clone https://github.com/jikkenio/jikken.git
$ cd jikken
$ cargo install

User Guide

Once you've installed jikken, using the tool is as simple as running the jk run command in a project folder that contains tests.

$ jk run
Jikken found 2 tests.
Running Test (1\2) `Test 1` Iteration(1\1)...PASSED!
Running Test (2\2) `Test 2` Iteration(1\2)...PASSED!
Running Test (2\2) `Test 2` Iteration(2\2)...PASSED!

Tests are defined with the Test Definition Format. The convention is they are saved as .jkt files. Jikken will scan for jkt files in the current directory and recurse through child directories looking for all test definitions it can find. If tests are provided a name, the output will use the name when executing. If no name is given it will simply give the name Test #.

The following output shows an example where there are two JKT files located describing tests to execute. The first test is used to authenticate with a system and receive an auth token. It then extracts and embeds that token into the subsequent tests. In this case the second test has two iterations (it runs twice calling the same endpoints, but each time it runs it passes in different variables).

$ jk run
Jikken found 2 tests.
Running Test (1\2) `Fetch Auth Credentials` Iteration(1\1)...PASSED!
Running Test (2\2) `My API Test` Iteration(1\2)...PASSED!
Running Test (2\2) `My API Test` Iteration(2\2)...PASSED!

If you are working on developing new tests, or if you'd like to see what will run without actually running it, Jikken supports a dryrun command. This will print out a report of steps that would occur under a normal run.

$ jk dryrun
Jikken found 3 tests.
Dry Run Test (1\3) `Test 1` Iteration(1\1)
request: POST https://api.jikken.io/v1/test_login
-- Content-Type: application/json
request_body: { "username":"testuser", "password":"password" }
validate request_status with defined status: 200
attempt to extract value from response: token = valueOf(auth.token)
Dry Run Test (2\3) `Check Status` Iteration(1\1)
request: GET https://api.jikken.io/v1/test_status
-- Authorization: ${token}
validate request_status with defined status: 200
Dry Run Test (3\3) `Compare StatusV2 and StatusV1` Iteration(1\1)
request: GET https://api.jikken.io/v2/test_status
-- Authorization: ${token}
validate request_status with defined status: 200
prune fields from response_body
filter: user.lastActivity
comparison mode
compare_request: GET https://api.jikken.io/v1/test_status
-- Authorization: ${token}
validate request_status_code matches compare_request_status_code
prune fields from compare_response_body
filter: user.lastActivity
validate filtered response_body matches filtered compare_response_body

Tests also support having tags. You can leverage tags and tag combinations to pinpoint execution of desired tests. For example if you tag specific tests for "regression" then you can invoke the tool to only run regression tests.

$ jk run -t regression
Jikken found 5 tests.

You can also provide multiple tags to control which tests run even further. Providing multiple tags by default will only execute tests that contain all of the tags provided.

$ jk run -t foo -t bar
Jikken found 2 tests.

If you would like to run all tests that have any of the provided tags, there is a CLI argument which makes the tags a logical or (if the test contains tag 1 or tag 2 or tag 3, etc).

$ jk run -t foo -t bar --tags-or
Jikken found 8 tests

Test Definition Format

For more information on our test definition format please check out our website: Jikken.io.

Config File Format

The Jikken CLI tool looks for a .jikken file in the folder it is being executed from. The .jikken file is defined in the TOML format.


Setting Default Description
continueOnFailure false When running jikken, by default, it will stop execution as soon as it encounters it's first test failure. The continueOnFailure setting allows you to execute all tests regardless of prior test execution. It is possible some test failures may cause other tests to fail, but for independent tests it can be useful to get a full picture of the pass/fail state for everything.
environment Jikken provides multiple ways to provide an environment label. This setting provides a label at the configuration file level, which will apply it to all tests which do not themselves have an env associated. This value will be overridden by the environment variable if it is provided.
apiKey The apiKey setting is used to provide a key for reporting test runs and status with the jikken.io webapp. This key is associated with your account and can be obtained from inside the webapp.

Globals are a way to define global variables which are used across all of your tests. This is useful for things such as base urls for API endpoints, environment variables, or auth credentials. It is important to note that currently variables (both global and locally defined in JKT files) are case sensitive. The variables can be whatever case you prefer as long as it matches the case of the variable definitions in the test files.

Environment Variables

Jikken supports environment variables as overrides to the .jikken configuration file.

EnvVar Value Description
JIKKEN_CONTINUE_ON_FAILURE true this environment variable will override the setting continueOnFailure as defined in the .jikken configuration file.
JIKKEN_ENVIRONMENT this environment variable will override the setting environment as defined in the .jikken configuration file.
JIKKEN_API_KEY this environment variable will override the setting apiKey as defined in the .jikken configuration file.

Jikken also supports global variable definition as Environment Variables. These may overwrite values which are in the .jikken file or simply define new ones that are not contained the file. The pattern for these definitions are a prefix of JIKKEN_GLOBAL_. An example of defining these in the same way as the above .jikken definition would be:

$ EXPORT JIKKEN_GLOBAL_newUrl=https://localhost:5001
$ EXPORT JIKKEN_GLOBAL_oldUrl=https://localhost:5002
$ jk

It is important to note that currently variables (both global and locally defined in JKT files) are case sensitive. The prefix should be in all caps JIKKEN_GLOBAL_ but everything after that can be whatever case you prefer as long as it matches the case of the variable definitions in the test files.


~705K SLoC