@bcoe/v8-coverage

Parsing V8 Coverage Data

This feature allows you to parse raw V8 coverage data into a more manageable format. The code sample demonstrates how to use the `parse` function to convert raw coverage data into a parsed format.

const { parse } = require('@bcoe/v8-coverage');
const coverageData = [
  {
    result: [
      {
        scriptId: '1',
        url: 'file.js',
        functions: [
          {
            functionName: 'foo',
            ranges: [
              { startOffset: 0, endOffset: 10, count: 1 }
            ],
            isBlockCoverage: true
          }
        ]
      }
    ]
  }
];
const parsedData = parse(coverageData);
console.log(parsedData);

Merging Coverage Data

This feature allows you to merge multiple sets of V8 coverage data into a single set. The code sample demonstrates how to use the `mergeProcessCovs` function to combine two sets of coverage data.

const { mergeProcessCovs } = require('@bcoe/v8-coverage');
const coverageData1 = [
  {
    result: [
      {
        scriptId: '1',
        url: 'file.js',
        functions: [
          {
            functionName: 'foo',
            ranges: [
              { startOffset: 0, endOffset: 10, count: 1 }
            ],
            isBlockCoverage: true
          }
        ]
      }
    ]
  }
];
const coverageData2 = [
  {
    result: [
      {
        scriptId: '1',
        url: 'file.js',
        functions: [
          {
            functionName: 'foo',
            ranges: [
              { startOffset: 0, endOffset: 10, count: 2 }
            ],
            isBlockCoverage: true
          }
        ]
      }
    ]
  }
];
const mergedData = mergeProcessCovs([coverageData1, coverageData2]);
console.log(mergedData);

Formatting Coverage Data

This feature allows you to format V8 coverage data into a JSON object. The code sample demonstrates how to use the `CoverageMap` class to create a coverage map and then format it as a JSON object.

const { CoverageMap } = require('@bcoe/v8-coverage');
const coverageData = [
  {
    result: [
      {
        scriptId: '1',
        url: 'file.js',
        functions: [
          {
            functionName: 'foo',
            ranges: [
              { startOffset: 0, endOffset: 10, count: 1 }
            ],
            isBlockCoverage: true
          }
        ]
      }
    ]
  }
];
const coverageMap = new CoverageMap(coverageData);
const formattedData = coverageMap.toJSON();
console.log(formattedData);