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I am using visual studio code and truffle and would like to easily debug my JavaScript tests.

A similar question has been asked here: how can I run a truffle test in a debugger?. This has been wrongly marked as a duplicated and not been released.

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2 Answers 2

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Add the following to your configurations in launch.json:

"configurations": [
        {
            "name": "run tests",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/truffle/build/cli.bundled.js",
            "args": ["test"],
            "cwd": "${workspaceRoot}",
            "outFiles": [
                "${workspaceRoot}/test/**/*"
            ],
          }
    ]

You will need to adjust the program property to match the path of your installed truffle if you have installed truffle globally.

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  • That doesn't seem to run the tests for me. Aug 15, 2018 at 22:01
  • 3
    It worked for me after I installed truffle as a local package
    – ulu
    Jan 20, 2019 at 10:21
  • You may want to add the network (configured in truffle-config.js) to the arguments, like, assuming you called your network develop: "args": ["test", "--network", "develop"], Also, you can just use the truffle executable instead of cli.bundled.js in the "program" section; I have found it running which truffle from shell.
    – Fanta
    Jul 17, 2021 at 10:33
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Clearly, if you have installed truffle globally (npm install -g truffle), you will need to provide the full path of that directory e.g.: "program": "/usr/local/lib/node_modules/truffle/build/cli.bundled.js"

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