@temporalio/nyc-test-coverage

@temporalio/nyc-test-coverage

Temporal's TypeScript SDK integration for Workflow code coverage with nyc and similar tools.

Getting Started

• npm install -D mocha nyc @temporalio/nyc-test-coverage
• Instantiate WorkflowCoverage from this package, and call augmentWorkerOptions() to configure Workflows to gather and export code coverage data:

import { WorkflowCoverage } from '@temporalio/nyc-test-coverage';

const workflowCoverage = new WorkflowCoverage();

worker = await Worker.create(workflowCoverage.augmentWorkerOptions({
  connection: nativeConnection,
  taskQueue,
  workflowsPath: require.resolve("./workflows"),
}));

• After your tests are done, call mergeIntoGlobalCoverage() to merge your Workflows' code coverage into nyc's global coverage.

after(() => {
  workflowCoverage.mergeIntoGlobalCoverage();
});

Usage with bundleWorkflowCode()

If you are pre-bundling your Workflows using bundleWorkflowCode(), we recommend using the augmentBundleOptions() method to configure your bundle options, followed by augmentWorkerOptionsWithBundle() to configure your Worker options as follows.

const bundle = await bundleWorkflowCode(
  workflowCoverage.augmentBundleOptions({
    workflowsPath: require.resolve('./workflows'),
  })
);

const worker = await Worker.create(
  workflowCoverage.augmentWorkerOptionsWithBundle({
    connection,
    taskQueue,
    workflowBundle: bundle,
    activities,
  })
);

With bundleWorkflowCode(), you still need to call mergeIntoGlobalCoverage() when your tests are done to merge Workflow test coverage into nyc's global test coverage.

after(() => {
  workflowCoverage.mergeIntoGlobalCoverage();
});

Usage with Jest

This package also works with Jest code coverage. However, this package only works with the default coverageProvider option 'babel'. This package does not work with coverageProvider: 'v8'. Complete the following steps to use this package with Jest.

• npm install jest @temporalio/nyc-test-coverage
• Check your Jest config and make sure the coverageProvider option is not set to 'v8'. Set coverageProvider to 'babel'.
• Instantiate WorkflowCoverage from this package, and call augmentWorkerOptions() to configure Workflows to gather and export code coverage data:

import { WorkflowCoverage } from '@temporalio/nyc-test-coverage';

const workflowCoverage = new WorkflowCoverage();

worker = await Worker.create(workflowCoverage.augmentWorkerOptions({
  connection: nativeConnection,
  taskQueue,
  workflowsPath: require.resolve("./workflows"),
}));

• After your tests are done, call mergeIntoGlobalCoverage() to merge your Workflows' code coverage into Jest's global coverage.

afterAll(() => {
  workflowCoverage.mergeIntoGlobalCoverage();
});