On this page

deno coverage

Print coverage reports from coverage profiles.

Command Jump to heading

deno coverage [OPTIONS] <COVERAGE>

Synopsis Jump to heading

deno coverage [--ignore=<ignore>] [--include=<regex>] [-q|--quiet] [--exclude=<regex>] [--lcov] [--output=<output>] [--html] [--detailed] [-h|--help] <COVERAGE>

deno coverage -h|--help

Description Jump to heading

Print coverage reports from coverage profiles.

By default, when you run deno test --coverage a coverage profile will be generated in the /coverage directory in the current working directory. Subsequently you can run deno coverage to print a coverage report to stdout.

deno test --coverage
deno coverage

Inclusions and Exclusions Jump to heading

By default coverage includes any of your code that exists on the local file system, and it's imports.

You can customize the inclusions and exclusions by using the --include and --exclude options.

You can expand the coverage to include files that are not on the local file system by using the --include option and customizing the regex pattern.

deno coverage --include="^file:|https:"

The default inclusion pattern should be sufficient for most use cases, but you can customize it to be more specific about which files are included in your coverage report.

Files that contain test.js, test.ts, test.jsx, or test.tsx in their name are excluded by default.

This is equivalent to:

deno coverage --exclude="test\.(js|mjs|ts|jsx|tsx)$"

This default setting prevents your test code from contributing to your coverage report. For a URL to match it must match the include pattern and not match the exclude pattern.

Output Formats Jump to heading

By default we support Deno's own coverage format - but you can also output coverage reports in the lcov format, or in html.

deno coverage --lcov --output=cov.lcov

This lcov file can be used with other tools that support the lcov format.

deno coverage --html

This will output a coverage report as a html file

Arguments Jump to heading


The name of the coverage profile to use. This coverage profile will be created as a result of running deno test --coverage and appears as a directory in your workspace.

Options Jump to heading

  • --ignore=<ignore>

    Ignore coverage files

  • --include=<regex>

    Include source files in the report

    [default: ^file:]

  • -q, --quiet

    Suppress diagnostic output

  • --exclude=<regex>

    Exclude source files from the report

    [default: test.(js|mjs|ts|jsx|tsx)$]

  • --lcov

    Output coverage report in lcov format

  • --output=<output>

    Exports the coverage report in lcov format to the given file. Filename should be passed along with '=' For example '--output=foo.lcov'

    If no --output option is specified then the report is written to stdout.

  • --html

    Output coverage report in HTML format in the given directory

  • --detailed

    Output coverage report in detailed format in the terminal.

  • -h, --help

    Print help (see a summary with '-h')

Examples Jump to heading

  • Generate a coverage report from the default coverage profile in your workspace
deno test --coverage
deno coverage
  • Generate a coverage report from a coverage profile with a custom name
deno test --coverage=custom_profile_name
deno coverage custom_profile_name
  • Only include coverage that matches a specific pattern - in this case, only include tests from main.ts
deno coverage --include="main.ts"
  • Export test coverage from the default coverage profile to an lcov file
deno test --coverage
deno coverage --lcov --output=cov.lcov