How to use the sendToCoveralls function from coveralls

Coveralls.sendToCoveralls is a function that sends code coverage data from a local machine to the Coveralls.io service for visualization and analysis.

How does coveralls.sendToCoveralls work?

Coveralls.sendToCoveralls works by taking code coverage data generated by a tool such as Istanbul or Jest and sending it to the Coveralls.io service via an HTTP POST request.

The function formats the coverage data into a JSON payload that includes information about the repository, the Git commit hash, and the test suite that generated the coverage data.

The JSON payload is then sent to the Coveralls API endpoint using an HTTPS request, where it is processed and made available for visualization and analysis on the Coveralls.io website.

The service displays information such as line and branch coverage percentages, code changes since the last build, and historical trends in coverage over time.

Ai Example

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const fs = require("fs");
const coveralls = require("coveralls");

// Read the coverage report generated by Istanbul
const reportJson = fs.readFileSync("coverage/coverage-final.json", "utf-8");

// Parse the coverage report into a JavaScript object
const report = JSON.parse(reportJson);

// Send the coverage data to Coveralls.io
coveralls.sendToCoveralls(report, function (err) {
  if (err) {
    console.error(err);
  } else {
    console.log("Coverage data sent to Coveralls.io successfully.");
  }
});

In this example, we first read in the code coverage report generated by Istanbul and parse it into a JavaScript object. We then pass this object to the coveralls.sendToCoveralls function along with a callback function to handle any errors that may occur during the request. The function sends the coverage data to the Coveralls.io service using an HTTPS POST request, where it can be viewed and analyzed on the Coveralls.io website.