Deno Test Coverage

shell script to collect test coverage when testing with Deno's built-in test runner

Usage

code coverage report is generated with a utility called genhtml that comes bundled with lcov. lcov can be installed with Homebrew on macOS.

brew install lcov

Deno

Deno is capable of spawning a subprocess and supports url imports. As a result, a code coverage report can be generated via the command line. There is no need to install any dependencies, just open a command line where you would normally run deno test and use the following code.

deno run --allow-run --allow-read --allow-write https://raw.githubusercontent.com/theogainey/Deno-Test-Coverage/main/coverage.ts

or

deno run --allow-all https://raw.githubusercontent.com/theogainey/Deno-Test-Coverage/main/coverage.ts

Additionally pass open as an argument to open the coverage report

deno run --allow-all https://raw.githubusercontent.com/theogainey/Deno-Test-Coverage/main/coverage.ts open

Bash

To run this script with Bash first copy the contents of coverage.sh to a project or this script can also added to a project via a command line

curl -sL https://raw.githubusercontent.com/theogainey/Deno-Test-Coverage/main/coverage.sh -o coverage.sh

after adding the script to a project a test coverage report can generated with

sh coverage.sh