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See remote pairing session for an overview of setting up tests.

Running All Tests

All packages except the plugin

  • Inside VSCode

    Run Task: Test (bootstrap)

  • Using CLI


Run all test for Dendron Plugin (plugin-core)

  1. Open the debug view
  2. Run Extension Integ Tests in the dropdown

Run Specific Test

Run a specific test for Dendron Plugin

  1. Open a test inside 'src/test/suite-integ/' from plugin-core
  2. Run the build task Extension Integ Tests - File

Run a specific test from non-dendron plugin package

  1. Go to file
  2. Use command prompt and run > Tasks: Run tasks
  3. Find the appropriate package and run > npm:test:watch {package}

Writing Tests

All packages have tests written in jest except plugin-core. these tests use mocha assertion because vscode has a special test harness built around mocha

Debugging Tests

You can put a breakpoint directly in any code that's part of plugin-core and it'll break at those points

Kevin's Aside: If you need to debug a related package, I haven't found a good way to put a break point. Instead, I manually insert a debugger statement and vscode will break. Don't forget to remove the debugger statement

Anatomy of an Engine Test

  • pre-req:
    • read over the overall design for Dendron

Testing the engine in Dendron involves a little bit of setup because:

  • it requires initializing the engine and seeding it with the right fixture for the test
  • it might require the same functionality be tested in multiple environments (plugin, CLI, server, engine, etc)
  • it might require using multiple test runners (dendron uses jest for all tests except for the dendron plugin which uses mocha)

Because of the aforementioned issues, we've created the following two classes to make testing easier and re-usable across environments.


  • setup a mock dendron environment

  • initialize the dendron engine

  • optionally seed engine with a preset

  • NOTE: there are currently multiple versions of this which track multiple generations of engine design

    • the most current version is runEngineTestV5
    • see example of usage here


  • code

  • this helps us create a TestPreset which is to be used with runEngineTest

  • lets you add different lifecycle hooks as the engine is beign initialized

  • NOTE: there are currently multiple versions of this

    • the most current version is TestPresetEntryV4

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