Istanbul

https://istanbul.js.org/
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Istanbul is a JavaScript test coverage tool that instruments ES5 and ES2015+ code to track how well...
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### Quick Start Example

Source: https://istanbul.js.org/docs/tutorials/mocha

A simplified example of adding 'nyc' to the test script for basic coverage.

```bash
npm install --save-dev nyc
```

```json
{
  "scripts": {
    "test": "nyc mocha"
  }
}
```

--------------------------------

### Quick Start - Basic Integration

Source: https://istanbul.js.org/docs/tutorials/ava

A simplified example of adding coverage to AVA tests by prepending 'nyc' to the test command.

```json
{
  "scripts": {
    "test": "nyc ava"
  }
}
```

--------------------------------

### Install Dependencies

Source: https://istanbul.js.org/docs/tutorials/es2015

This command installs the necessary development dependencies for setting up test coverage with ES2015+ and Babel.

```bash
npm i @babel/cli @babel/register babel-plugin-istanbul @babel/preset-env cross-env mocha chai nyc --save-dev
```

--------------------------------

### Writing Tests with ES2015+

Source: https://istanbul.js.org/docs/tutorials/es2015

An example of writing tests using ES2015+ syntax, leveraging @babel/register for automatic compilation.

```javascript
import CoverageBabel from './index'

require('chai').should()

describe('CoverageBabel', function () {
  it('returns hello world message', function () {
    const cls = new CoverageBabel('Ben')
    cls.helloMessage().should.equal('hello Ben')
  })
})
```

--------------------------------

### Add Travis CI statements for Codecov

Source: https://istanbul.js.org/docs/tutorials/intern

Add statements to `.travis.yml` to install codecov and upload results.

```yaml
# .travis.yml
install:
  - npm install
  - npm install -g codecov
script:
  - npm run ci && codecov
```

--------------------------------

### Using Alternative Reporters

Source: https://istanbul.js.org/docs/tutorials/ava

Specify alternative or multiple reporters using the --reporter flag. This example outputs both text and HTML reports.

```json
{
  "scripts": {
    "test": "nyc --reporter=html --reporter=text ava"
  }
}
```

--------------------------------

### Integrating with Coveralls

Source: https://istanbul.js.org/docs/tutorials/ava

Steps to integrate Istanbul with Coveralls and Travis CI, including installing the coveralls dependency and updating package.json scripts.

```bash
npm install coveralls --save-dev
```

```json
{
  "script": {
     "test": "nyc --reporter=html --reporter=text ava",
     "coverage": "nyc report --reporter=text-lcov | coveralls"
  }
}
```

--------------------------------

### Add coverage to mocha tests

Source: https://istanbul.js.org/

Install nyc as a dev dependency and prepend the 'nyc' command to your existing test command in package.json.

```bash
$ npm install --save-dev nyc
```

```json
{
  "scripts": {
    "test": "nyc mocha"
  }
}
```

--------------------------------

### Coverage summary output

Source: https://istanbul.js.org/docs/tutorials/intern

Intern's Node-based reporters output a coverage summary to the console if any coverage data was collected. This is an example of the output.

```text
Total coverage
-------------------------|----------|----------|----------|----------|----------------|
File                     |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
-------------------------|----------|----------|----------|----------|----------------|
All files                |    91.22 |     80.8 |    88.95 |    91.17 |                |
 src                     |      100 |      100 |      100 |      100 |                |
  index.ts               |      100 |      100 |      100 |      100 |                |
 src/bin                 |    93.55 |    68.75 |      100 |    92.86 |                |
  intern.ts              |    93.55 |    68.75 |      100 |    92.86 |    24,39,76,92 |
 src/lib                 |    90.87 |    82.77 |    86.74 |    91.08 |                |
  BenchmarkSuite.ts      |      100 |      100 |      100 |      100 |                |
  BenchmarkTest.ts       |     91.3 |    74.29 |    81.82 |    91.11 |... 214,254,255 |
  Channel.ts             |      100 |       75 |      100 |      100 |             25 |
-------------------------|----------|----------|----------|----------|----------------|
```

--------------------------------

### LCOV Reporter Output

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

Example of the LCOV output, a standard format for code coverage data.

```lcov
TN:
SF:$PROJECT_PATH/src/bar/index.ts
FN:7,baz
FNF:1
FNH:1
FNDA:2,baz
DA:1,1
DA:2,1
DA:3,1
DA:5,1
DA:8,2
DA:9,1
DA:13,1
DA:16,1
DA:20,1
DA:21,1
LF:10
LH:10
BRDA:8,0,0,1
BRDA:8,0,1,1
BRF:2
BRH:2
end_of_record
```

--------------------------------

### TeamCity Reporter Output

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

Example of the TeamCity reporter output, which provides build statistics for code coverage.

```teamcity
##teamcity[blockOpened name='Code Coverage Summary']
##teamcity[buildStatisticValue key='CodeCoverageAbsBCovered' value='166']
##teamcity[buildStatisticValue key='CodeCoverageAbsBTotal' value='166']
##teamcity[buildStatisticValue key='CodeCoverageAbsRCovered' value='18']
##teamcity[buildStatisticValue key='CodeCoverageAbsRTotal' value='24']
##teamcity[buildStatisticValue key='CodeCoverageAbsMCovered' value='49']
##teamcity[buildStatisticValue key='CodeCoverageAbsMTotal' value='49']
##teamcity[buildStatisticValue key='CodeCoverageAbsLCovered' value='161']
##teamcity[buildStatisticValue key='CodeCoverageAbsLTotal' value='161']
##teamcity[blockClosed name='Code Coverage Summary']
```

--------------------------------

### Text Reporter Output

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

Example of the detailed plain text reporter output, showing coverage breakdown by file.

```text
------------------|----------|----------|----------|----------|----------------|
File              |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
------------------|----------|----------|----------|----------|----------------|
All files         |      100 |       75 |      100 |      100 |                |
  src              |      100 |      100 |      100 |      100 |                |
  errors.ts       |      100 |      100 |      100 |      100 |                |
  test.ts         |      100 |      100 |      100 |      100 |                |
  src/config       |      100 |       50 |      100 |      100 |                |
  index.ts        |      100 |       50 |      100 |      100 |        2,5,6,7 |
  src/crud         |      100 |      100 |      100 |      100 |                |
  index.test.ts   |      100 |      100 |      100 |      100 |                |
  src/crud/insert  |      100 |     87.5 |      100 |      100 |                |
  index.test.ts   |      100 |       50 |      100 |      100 |             25 |
  index.ts        |      100 |      100 |      100 |      100 |                |
------------------|----------|----------|----------|----------|----------------|
```

--------------------------------

### Text Summary Reporter Output

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

Example of the plain text summary output, providing an overview of coverage percentages.

```text
=============================== Coverage summary ===============================
Statements   : 100% ( 166/166 )
Branches     : 75% ( 18/24 )
Functions    : 100% ( 49/49 )
Lines        : 100% ( 161/161 )
================================================================================
```

--------------------------------

### JSON Reporter Output

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

Example of the JSON output generated by the JSON reporter, showing coverage details for specific files.

```json
{"$PROJECT_PATH/src/errors.ts": {"path":"$PROJECT_PATH/src/errors.ts","statementMap":{"0":{"start":{"line":1,"column":32},"end":{"line":1,"column":72}},"1":{"start":{"line":4,"column":2},"end":{"line":4,"column":25}}},"fnMap":{},"branchMap":{},"s":{"0":1,"1":1},"f":{},"b":{}}
," $PROJECT_PATH/src/init/env.ts": {"path":"$PROJECT_PATH/src/init/env.ts","statementMap":{"0":{"start":{"line":1,"column":0},"end":{"line":1,"column":32}},"1":{"start":{"line":2,"column":0},"end":{"line":2,"column":16}}},"fnMap":{},"branchMap":{},"s":{"0":1,"1":1},"f":{},"b":{}}
}
```

--------------------------------

### Configure coverage on the command line

Source: https://istanbul.js.org/docs/tutorials/intern

Coverage can also be specified on the command line.

```bash
$ npx intern coverage='_build/src/**/*.js'
```

--------------------------------

### Create coverage report with nyc

Source: https://istanbul.js.org/docs/tutorials/iotjs

Use nyc to create a coverage report, specifying the reporter and the temporary directory containing coverage data.

```bash
node_modules/.bin/nyc report --reporter=lcov --temp-directory=/path/to/coverage/data
```

--------------------------------

### Specify reporters on the command line

Source: https://istanbul.js.org/docs/tutorials/intern

Reporters can also be specified on the command line.

```bash
$npx intern reporters=runner reporters=jsoncoverage
```

--------------------------------

### Instrument source code with nyc

Source: https://istanbul.js.org/docs/tutorials/iotjs

Use nyc to transpile source code and provide line counters for instrumentation.

```bash
node_modules/.bin/nyc instrument path/to/source /path/to/output
```

--------------------------------

### Scripts Configuration (package.json)

Source: https://istanbul.js.org/docs/tutorials/es2015

This package.json script stanza defines commands for building the project, running tests with nyc and mocha, and a pre-publish script to build before publishing.

```json
{
  "scripts": {
    "build": "babel index.js -d src",
    "test": "cross-env NODE_ENV=test nyc mocha test.js",
    "prepublish": "npm run build"
  }
}
```

--------------------------------

### Add npm script for CI tests

Source: https://istanbul.js.org/docs/tutorials/intern

Add an npm script to your project's `package.json` to run CI tests.

```json
{
  "scripts": {
    "ci": "tsc && npm run test",
    "test: " "intern"
  }
}
```

--------------------------------

### Configure reporter options in Intern config

Source: https://istanbul.js.org/docs/tutorials/intern

Reporter options such as the output directory or watermarks can be specified by using a properties object.

```json
{
  "reporters": [
    "runner",
    {
      "name": "jsoncoverage",
      "filename": "coverage.json"
    }
  ]
}
```

--------------------------------

### Basic Istanbul Integration

Source: https://istanbul.js.org/docs/tutorials/ava

To enable Istanbul coverage, prepend the 'nyc' command to your existing test script in package.json.

```json
{
  "scripts": {
    "test": "nyc ava --timeout=3000"
  }
}
```

--------------------------------

### Show Process Tree

Source: https://istanbul.js.org/docs/advanced/process-tree

Command to run a test script with nyc and display the process tree, along with the coverage report.

```bash
$ nyc --show-process-tree npm test
   3 passed
----------|----------|----------|----------|----------|----------------|
File      |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
----------|----------|----------|----------|----------|----------------|
All files |      100 |      100 |      100 |      100 |                |
 index.js |      100 |      100 |      100 |      100 |                |
----------|----------|----------|----------|----------|----------------|
nyc
└─┬ /usr/local/bin/node /usr/local/bin/npm test
  └─┬ /usr/local/bin/node /path/to/your/project/node_modules/.bin/ava
    └── /usr/local/bin/node /path/to/your/project/node_modules/ava/lib/test-worker.js …
```

--------------------------------

### Enable Coverage

Source: https://istanbul.js.org/docs/tutorials/tap

This configuration enables code coverage tracking for tests run with `tap`.

```json
{
  "scripts": {
    "test": "tap test/*.js --coverage"
  }
}
```

--------------------------------

### package.json configuration

Source: https://istanbul.js.org/docs/tutorials/typescript

Minimum recommended configuration for package.json to enable Istanbul coverage for TypeScript with mocha.

```json
{
  "scripts": {
    "test": "nyc mocha"
  },
  "nyc": {
    "extension": [
      ".ts",
      ".tsx"
    ],
    "exclude": [
      "**/*.d.ts"
    ],
    "reporter": [
      "html"
    ],
    "all": true  
  }
}
```

--------------------------------

### Publishable Files Configuration (package.json)

Source: https://istanbul.js.org/docs/tutorials/es2015

This package.json configuration specifies which files should be published to npm, ensuring only the compiled ES5 code is included.

```json
{
  "files": [
    "src/index.js"
  ]
}
```

--------------------------------

### Using Alternative Reporters

Source: https://istanbul.js.org/docs/tutorials/tap

This configuration specifies the `html` reporter for coverage reports, which will be output to `./coverage/index.html` and opened in the web browser by default.

```json
{
  "scripts": {
    "test": "tap --coverage --coverage-report=html"
  }
}
```

--------------------------------

### test/mocha.opts configuration

Source: https://istanbul.js.org/docs/tutorials/typescript

Configuration for test/mocha.opts to enable TypeScript compilation and source map support for mocha tests.

```bash
--require ts-node/register # replace with ts-node/register/transpile-only if you have custom types
--require source-map-support/register
--recursive
<glob for your test files>

```

--------------------------------

### Instrumenting source files

Source: https://istanbul.js.org/docs/advanced/instrument

This command instruments source files located in the './lib' directory and outputs the instrumented files to the './output' directory.

```bash
nyc instrument ./lib ./output
```

--------------------------------

### Babel Configuration (.babelrc)

Source: https://istanbul.js.org/docs/tutorials/es2015

This .babelrc file configures Babel to use the @babel/preset-env and enables the istanbul plugin for the test environment.

```json
{
  "presets": [
    "@babel/preset-env"
  ],
  "env": {
    "test": {
      "plugins": [
        "istanbul"
      ]
    }
  }
}
```

--------------------------------

### Alternative Reporters

Source: https://istanbul.js.org/docs/tutorials/mocha

This snippet demonstrates how to use multiple reporters, including HTML and text, by specifying the --reporter flag.

```json
{
  "scripts": {
    "test": "nyc --reporter=html --reporter=text mocha"
  }
}
```

--------------------------------

### Configure coverage in Intern config file

Source: https://istanbul.js.org/docs/tutorials/intern

Specify files to be covered using a glob string or an array of glob strings in the Intern config file.

```json
{
  "coverage": "_build/src/**/*.js"
}
```

--------------------------------

### Configure Intern for Codecov.io

Source: https://istanbul.js.org/docs/tutorials/intern

Configure Intern to gather coverage and output it with a reporter that generates codecov-compatible output, such as lcov or jsoncoverage.

```json
{
  "coverage": "_build/src/**/*.js",
  "reporters": [
    {
      "name": "jsoncoverage",
      "filename": "coverage.json"
    }
  ]
}
```

--------------------------------

### Coveralls Integration

Source: https://istanbul.js.org/docs/tutorials/mocha

This snippet shows how to add the coveralls dependency and update package.json scripts for integration with coveralls.io.

```bash
npm install coveralls --save-dev
```

```json
{
  "script": {
     "test": "nyc --reporter=html --reporter=text mocha",
     "coverage": "nyc report --reporter=text-lcov | coveralls"
  }
}
```

--------------------------------

### NYC Configuration (package.json)

Source: https://istanbul.js.org/docs/tutorials/es2015

This package.json configuration sets up nyc to require @babel/register for ES2015+ support, disables nyc's source map and instrumentation, and specifies reporters.

```json
{
  "nyc": {
    "require": [
      "@babel/register"
    ],
    "reporter": [
      "lcov",
      "text"
    ],
    "sourceMap": false,
    "instrument": false
  }
}
```

--------------------------------

### Output coverage data

Source: https://istanbul.js.org/docs/tutorials/iotjs

Modify test files to output gathered coverage data to a file upon process exit.

```javascript
process.on('exit', function () { require('fs').writeFileSync('coverage.data', Buffer(JSON.stringify(__coverage__))) })
```

--------------------------------

### Generate report from coverage object

Source: https://istanbul.js.org/docs/advanced/coverage-object-report

Output the contents of window.__coverage__ (assuming it's in Istanbul 1.0 format) to .nyc_output/out.json.

```bash
nyc report --reporter=html
```

--------------------------------

### Enforce 100% Coverage

Source: https://istanbul.js.org/docs/tutorials/tap

This configuration enforces 100% coverage of lines, branches, functions, and statements.

```json
{
  "scripts": {
    "test": "tap test/*.js --100"
  }
}
```

--------------------------------

### Basic Mocha Test Script

Source: https://istanbul.js.org/docs/tutorials/mocha

This snippet shows how to add 'nyc' to your package.json test script for basic coverage.

```json
{
  "scripts": {
    "test": "nyc mocha --timeout=3000"
  }
}
```

--------------------------------

### Pass Istanbul options via Intern config

Source: https://istanbul.js.org/docs/tutorials/intern

If necessary, Istanbul options can be passed directly to the instrumenter by providing an `instrumenterOptions` property in the Intern config file.

```json
{
  "instrumenterOptions": { "esModules": true }
}
```

--------------------------------

### Specify reporters in Intern config

Source: https://istanbul.js.org/docs/tutorials/intern

Intern provides access to various Istanbul reporters. Reporters can be specified using the `reporters` config property.

```json
{
  "reporters": [ "runner", "jsoncoverage" ]
}
```

--------------------------------

### Environment Information Script

Source: https://istanbul.js.org/contributing

A script to capture environment information including Node.js version, npm version, and project dependencies.

```sh
sh -c 'node --version; npm --version; npm ls' > output.txt
```

--------------------------------

### Shipping Code with Babel CLI

Source: https://istanbul.js.org/docs/tutorials/es2015

This command uses Babel CLI to compile ES2015+ JavaScript into ES5 compatible code for publishing.

```bash
babel index.js -d src
```

--------------------------------

### JSON Coverage Summary

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

The coverage summary is generated at `coverage/coverage-summary.json` and provides a detailed breakdown of code coverage metrics.

```json
{
"total": {"lines":{"total":161,"covered":161,"skipped":0,"pct":100},"statements":{"total":166,"covered":166,"skipped":0,"pct":100},"functions":{"total":49,"covered":49,"skipped":0,"pct":100},"branches":{"total":24,"covered":18,"skipped":0,"pct":75}}
,"$PROJECT_PATH/src/errors.ts": {"lines":{"total":2,"covered":2,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":2,"covered":2,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/test.ts": {"lines":{"total":9,"covered":9,"skipped":0,"pct":100},"functions":{"total":4,"covered":4,"skipped":0,"pct":100},"statements":{"total":9,"covered":9,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/config/index.ts": {"lines":{"total":10,"covered":10,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":10,"covered":10,"skipped":0,"pct":100},"branches":{"total":8,"covered":4,"skipped":0,"pct":50}}
,"$PROJECT_PATH/src/crud/index.test.ts": {"lines":{"total":1,"covered":1,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":1,"covered":1,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/crud/insert/index.test.ts": {"lines":{"total":36,"covered":36,"skipped":0,"pct":100},"functions":{"total":16,"covered":16,"skipped":0,"pct":100},"statements":{"total":37,"covered":37,"skipped":0,"pct":100},"branches":{"total":2,"covered":1,"skipped":0,"pct":50}}
,"$PROJECT_PATH/src/crud/insert/index.ts": {"lines":{"total":5,"covered":5,"skipped":0,"pct":100},"functions":{"total":2,"covered":2,"skipped":0,"pct":100},"statements":{"total":6,"covered":6,"skipped":0,"pct":100},"branches":{"total":6,"covered":6,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/customers/index.test.ts": {"lines":{"total":14,"covered":14,"skipped":0,"pct":100},"functions":{"total":4,"covered":4,"skipped":0,"pct":100},"statements":{"total":14,"covered":14,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/customers/index.ts": {"lines":{"total":5,"covered":5,"skipped":0,"pct":100},"functions":{"total":1,"covered":1,"skipped":0,"pct":100},"statements":{"total":6,"covered":6,"skipped":0,"pct":100},"branches":{"total":2,"covered":2,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/init/env.ts": {"lines":{"total":2,"covered":2,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":2,"covered":2,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/init/index.test.ts": {"lines":{"total":4,"covered":4,"skipped":0,"pct":100},"functions":{"total":2,"covered":2,"skipped":0,"pct":100},"statements":{"total":4,"covered":4,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/init/execute/index.test.ts": {"lines":{"total":26,"covered":26,"skipped":0,"pct":100},"functions":{"total":7,"covered":7,"skipped":0,"pct":100},"statements":{"total":26,"covered":26,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/init/execute/index.ts": {"lines":{"total":8,"covered":8,"skipped":0,"pct":100},"functions":{"total":1,"covered":1,"skipped":0,"pct":100},"statements":{"total":9,"covered":9,"skipped":0,"pct":100},"branches":{"total":2,"covered":2,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/init/gateway/index.ts": {"lines":{"total":2,"covered":2,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":2,"covered":2,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
,"$PROJECT_PATH/src/payments/index.test.ts": {"lines":{"total":27,"covered":27,"skipped":0,"pct":100},"functions":{"total":11,"covered":11,"skipped":0,"pct":100},"statements":{"total":28,"covered":28,"skipped":0,"pct":100},"branches":{"total":2,"covered":1,"skipped":0,"pct":50}}
,"$PROJECT_PATH/src/payments/index.ts": {"lines":{"total":10,"covered":10,"skipped":0,"pct":100},"functions":{"total":1,"covered":1,"skipped":0,"pct":100},"statements":{"total":10,"covered":10,"skipped":0,"pct":100},"branches":{"total":2,"covered":2,"skipped":0,"pct":100}}
}
```

--------------------------------

### cobertura

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

The following is generated at coverage/cobertura-coverage.xml:

```xml
<?xml version="1.0" ?>
<!DOCTYPE coverage SYSTEM "http://cobertura.sourceforge.net/xml/coverage-04.dtd">
<coverage lines-valid="161" lines-covered="161" line-rate="1" branches-valid="24" branches-covered="18" branch-rate="0.75" timestamp="1500242087605" complexity="0" version="0.1">
  <sources>
    <source>$PROJECT_PATH</source>
  </sources>
  <packages>
    <package name="src" line-rate="1" branch-rate="1">
      <classes>
        <class name="errors.ts" filename="src/errors.ts" line-rate="1" branch-rate="1">
          <methods>
          </methods>
          <lines>
            <line number="1" hits="1" branch="false"/>
            <line number="4" hits="1" branch="false"/>
          </lines>
        </class>
        <class name="test.ts" filename="src/test.ts" line-rate="1" branch-rate="1">
          <methods>
            <method name="(anonymous_0)" hits="1" signature="()V">
              <lines>
                <line number="3" hits="1"/>
              </lines>
            </method>
            <method name="(anonymous_1)" hits="1" signature="()V">
              <lines>
                <line number="6" hits="1"/>
              </lines>
            </method>
            <method name="(anonymous_2)" hits="1" signature="()V">
              <lines>
                <line number="9" hits="1"/>
              </lines>
            </method>
            <method name="(anonymous_3)" hits="1" signature="()V">
              <lines>
                <line number="12" hits="1"/>
              </lines>
            </method>
          </methods>
          <lines>
            <line number="1" hits="1" branch="false"/>
            <line number="3" hits="1" branch="false"/>
            <line number="4" hits="1" branch="false"/>
            <line number="6" hits="1" branch="false"/>
            <line number="7" hits="1" branch="false"/>
            <line number="9" hits="1" branch="false"/>
            <line number="10" hits="1" branch="false"/>
            <line number="12" hits="1" branch="false"/>
            <line number="13" hits="1" branch="false"/>
          </lines>
        </class>
      </classes>
    </package>
  </packages>
</coverage>
```

--------------------------------

### clover

Source: https://istanbul.js.org/docs/advanced/alternative-reporters

The following is generated at coverage/clover.xml:

```xml
<?xml version="1.0" encoding="UTF-8"?>
<coverage generated="1500242170615" clover="3.2.0">
  <project timestamp="1500242170615" name="All files">
    <metrics statements="161" coveredstatements="161" conditionals="24" coveredconditionals="18" methods="49" coveredmethods="49" elements="234" coveredelements="228" complexity="0" loc="161" ncloc="161" packages="9" files="15" classes="15">
      <package name="src">
        <metrics statements="11" coveredstatements="11" conditionals="0" coveredconditionals="0" methods="4" coveredmethods="4"/>
        <file name="errors.ts" path="$PROJECT_PATH/src/errors.ts">
          <metrics statements="2" coveredstatements="2" conditionals="0" coveredconditionals="0" methods="0" coveredmethods="0"/>
          <line num="1" count="1" type="stmt"/>
          <line num="4" count="1" type="stmt"/>
        </file>
        <file name="test.ts" path="$PROJECT_PATH/src/test.ts">
          <metrics statements="9" coveredstatements="9" conditionals="0" coveredconditionals="0" methods="4" coveredmethods="4"/>
          <line num="1" count="1" type="stmt"/>
          <line num="3" count="1" type="stmt"/>
          <line num="4" count="1" type="stmt"/>
          <line num="6" count="1" type="stmt"/>
          <line num="7" count="1" type="stmt"/>
          <line num="9" count="1" type="stmt"/>
          <line num="10" count="1" type="stmt"/>
          <line num="12" count="1" type="stmt"/>
          <line num="13" count="1" type="stmt"/>
        </file>
      </package>
    </metrics>
  </project>
</coverage>
```
Tokens:
Raw