Overview

JUnit test report files are XML files that contain test execution information, such as test and suite names, pass or fail status, duration, and sometimes error logs. Although introduced by the JUnit testing framework, many other popular frameworks are able to output results using this format.

If your testing framework can generate JUnit XML test reports, you can use these as a lightweight alternative to instrumenting your tests natively using Datadog tracers. Test results imported from JUnit XML reports appear alongside test data reported by tracers.

Compatibility

Supported Datadog tracing library:

Installing the Datadog CI CLI

Install the datadog-ci CLI globally using npm:

npm install -g @datadog/datadog-ci

Standalone binary

If installing Node.js in the CI is an issue, standalone binaries are provided with Datadog CI releases. Only linux-x64, linux-arm64, darwin-x64, darwin-arm64 (MacOS) and win-x64 (Windows) are supported. To install, run the following from your terminal:

curl -L --fail "https://github.com/DataDog/datadog-ci/releases/latest/download/datadog-ci_linux-x64" --output "/usr/local/bin/datadog-ci" && chmod +x /usr/local/bin/datadog-ci

datadog-ci version

curl -L --fail "https://github.com/DataDog/datadog-ci/releases/latest/download/datadog-ci_darwin-x64" --output "/usr/local/bin/datadog-ci" && chmod +x /usr/local/bin/datadog-ci

datadog-ci version

Invoke-WebRequest -Uri "https://github.com/DataDog/datadog-ci/releases/latest/download/datadog-ci_win-x64.exe" -OutFile "datadog-ci.exe"

Start-Process -FilePath "./datadog-ci.exe" -ArgumentList version

Uploading test reports

To upload your JUnit XML test reports to Datadog, run the following command, specifying the name of the service or library that was tested using the --service parameter, and one or more file paths to either the XML report files directly or directories containing them:

datadog-ci junit upload --service <service_name> <path> [<path> ...]

Specify a valid Datadog API key in the DATADOG_API_KEY environment variable, and the environment where tests were run (for example, local when uploading results from a developer workstation, or ci when uploading them from a CI provider) in the DD_ENV environment variable. For example:

DD_ENV=ci DATADOG_API_KEY=<api_key> DATADOG_SITE= datadog-ci junit upload \
  --service my-api-service \
  unit-tests/junit-reports e2e-tests/single-report.xml

steps:
  - name: Run tests
    run: ./run-tests.sh
  - name: Upload test results to Datadog
    if: always()
    run: datadog-ci junit upload --service service_name ./junit.xml

test:
  stage: test
  script:
    - ./run-tests.sh
  after_script:
    - datadog-ci junit upload --service service_name ./junit.xml

pipeline {
  agent any
  stages {
    stage('Run tests') {
      steps {
        sh './run-tests.sh'
      }
      post {
        always {
          sh 'datadog-ci junit upload --service service_name ./junit.xml'
        }
      }
    }
  }
}

$(./run-tests.sh); export tests_exit_code=$?
datadog-ci junit upload --service service_name ./junit.xml
if [ $tests_exit_code -ne 0 ]; then exit $tests_exit_code; fi

Reports larger than 250 MiB may not be processed completely, resulting in missing tests or logs. For the best experience, ensure that the reports are under 250 MiB.

Configuration settings

This is the full list of options available when using the datadog-ci junit upload command:

--service (Required)

Name of the service or library under test.
Environment variable: DD_SERVICE
Example: my-api-service

--env

Environment where tests were run.
Environment variable: DD_ENV
Example: ci

--tags

Key-value pairs in the form key:value to be attached to all tests (the --tags parameter can be specified multiple times). When specifying tags using DD_TAGS, separate them using commas (for example, team:backend,priority:high).
Environment variable: DD_TAGS
Default: (none)
Example: team:backend
Note: Tags specified using --tags and with the DD_TAGS environment variable are merged. If the same key appears in both --tags and DD_TAGS, the value in the environment variable DD_TAGS takes precedence.

--measures

Key-value numerical pairs in the form key:number to be attached to all tests (the --measures parameter can be specified multiple times). When specifying measures using DD_MEASURES, separate them using commas (for example, memory_allocations:13,test_importance:2).
Environment variable: DD_MEASURES
Default: (none)
Example: memory_allocations:13
Note: Measures specified using --measures and with the DD_MEASURES environment variable are merged. If the same key appears in both --measures and DD_MEASURES, the value in the environment variable DD_MEASURES takes precedence.

--report-tags

Key-value pairs in the form key:value. Works like the --tags parameter but these tags are only applied at the session level and are not merged with the environment variable DD_TAGS
Default: (none)
Example: test.code_coverage.enabled:true

--report-measures

Key-value pairs in the form key:123. Works like the --measures parameter but these tags are only applied at the session level and are not merged with the environment variable DD_MEASURES
Default: (none)
Example: test.code_coverage.lines_pct:82

--xpath-tag

Key and xpath expression in the form key=expression. These provide a way to customize tags for test in the file (the --xpath-tag parameter can be specified multiple times).
See Providing metadata with XPath expressions for more details on the supported expressions.
Default: (none)
Example: test.suite=/testcase/@classname
Note: Tags specified using --xpath-tag and with --tags or DD_TAGS environment variable are merged. xpath-tag gets the highest precedence, as the value is usually different for each test.

--logs

Enable forwarding content from the XML reports as Logs. The content inside <system-out>, <system-err>, and <failure> is collected as logs. Logs from elements inside a <testcase> are automatically connected to the test.
Environment variable: DD_CIVISIBILITY_LOGS_ENABLED
Default: false
Note: Logs are billed separately from Test Optimization.

--max-concurrency

The number of concurrent uploads to the API.
Default: 20

--dry-run

Runs the command without actually uploading the file to Datadog. All other checks are performed.
Default: false

--skip-git-metadata-upload

Boolean flag used to skip git metadata upload.
Default: false

--git-repository-url

The repository URL to retrieve git metadata from. If it is not passed, the URL is retrieved from the local git repository.
Default: local git repository
Example: git@github.com:DataDog/documentation.git

--verbose

Flag used to add extra verbosity to the output of the command
Default: false

Positional arguments

The file paths or directories in which the JUnit XML reports are located. If you pass a directory, the CLI looks for all .xml files in it.

For more information about service and env reserved tags, see Unified Service Tagging.

The following environment variables are supported:

DATADOG_API_KEY (Required)

Datadog API key used to authenticate the requests.
Default: (none)

Additionally, configure the Datadog site to use the selected one ():

DATADOG_SITE (Required)

The Datadog site to upload results to.
Default: datadoghq.com
Selected site:

Collecting Git metadata

Datadog uses Git information for visualizing your test results and grouping them by repository, branch, and commit. Git metadata is automatically collected by the test instrumentation from CI provider environment variables and the local .git folder in the project path, if available.

If you are running tests in non-supported CI providers or with no .git folder, you can set the Git information manually using environment variables. These environment variables take precedence over any auto-detected information. Set the following environment variables to provide Git information:

DD_GIT_REPOSITORY_URL

URL of the repository where the code is stored. Both HTTP and SSH URLs are supported.
Example: git@github.com:MyCompany/MyApp.git, https://github.com/MyCompany/MyApp.git

DD_GIT_BRANCH

Git branch being tested. Leave empty if providing tag information instead.
Example: develop

DD_GIT_TAG

Git tag being tested (if applicable). Leave empty if providing branch information instead.
Example: 1.0.1

DD_GIT_COMMIT_SHA

Full commit hash.
Example: a18ebf361cc831f5535e58ec4fae04ffd98d8152

DD_GIT_COMMIT_MESSAGE

Commit message.
Example: Set release number

DD_GIT_COMMIT_AUTHOR_NAME

Commit author name.
Example: John Smith

DD_GIT_COMMIT_AUTHOR_EMAIL

Commit author email.
Example: john@example.com

DD_GIT_COMMIT_AUTHOR_DATE

Commit author date in ISO 8601 format.
Example: 2021-03-12T16:00:28Z

DD_GIT_COMMIT_COMMITTER_NAME

Commit committer name.
Example: Jane Smith

DD_GIT_COMMIT_COMMITTER_EMAIL

Commit committer email.
Example: jane@example.com

DD_GIT_COMMIT_COMMITTER_DATE

Commit committer date in ISO 8601 format.
Example: 2021-03-12T16:00:28Z

Collecting environment configuration metadata

Datadog uses special dedicated tags to identify the configuration of the environment in which tests run, including the operating system, runtime, and device information, if applicable. When the same test for the same commit runs in more than one configuration (for example, on Windows and on Linux), the tags are used to differentiate the test in failure and flakiness detection.

You can specify these special tags using the --tags parameter when calling datadog-ci junit upload, or by setting the DD_TAGS environment variable.

All of these tags are optional, and only the ones you specify will be used to differentiate between environment configurations.

test.bundle

Used to execute groups of test suites separately.
Examples: ApplicationUITests, ModelTests

os.platform

Name of the operating system.
Examples: windows, linux, darwin

os.version

Version of the operating system.
Examples: 10.15.4, 14.3.2, 95

os.architecture

Architecture of the operating system.
Examples: x64, x86, arm64

runtime.name

Name of the language interpreter or programming runtime.
Examples: .NET, .NET Core, OpenJDK Runtime Environment, Java(TM) SE Runtime Environment, CPython

runtime.version

Version of the runtime.
Examples: 5.0.0, 3.1.7

runtime.vendor

Name of the runtime vendor where applicable. For example, when using a Java runtime.
Examples: AdoptOpenJDK, Oracle Corporation

runtime.architecture

Architecture of the runtime.
Examples: x64, x86, arm64

For mobile apps (Swift, Android):

device.model

The model of the device being tested.
Examples: iPhone11,4, AppleTV5,3

device.name

The name of the device being tested.
Examples: iPhone 12 Pro Simulator, iPhone 13 (QA team)

Adding code owners

To add codeowners information to your JUnit XML tests, you can use the GitHub integration to read the CODEOWNERS file in your repository or provide some additional information manually.

As a result, the JUnit XML tests have a test.codeowners tag with the owner of those tests.

Using the GitHub integration (recommended)

To automatically add the test.codeowners tag to your tests, you need to:

1. Have a CODEOWNERS file in one of the allowed locations in your repository.

2. Provide the tests source file in your JUnit XML report. The following plugins do this automatically and add the file attribute to the <testcase> or <testsuite> elements in the XML report:

   • phpunit
   • Most Python plugins (pytest, unittest)
   • Most Ruby plugins (ruby minitest)

   If the XML does not have the file attribute, you need to provide the source file manually. Example of a valid report:

  <?xml version="1.0" encoding="UTF-8"?>
  <testsuite name="suite">
    <testcase name="test_with_file" file="src/commands/junit" />
  </testsuite>
  

3. Enable the GitHub app. If you do not have a GitHub app, follow the steps in the next section. If you already have a GitHub app, enable the Contents: Read permission so Datadog can read the CODEOWNERS file. Once enabled, wait a few minutes for the changes to take effect.

Note: Github is the only supported Git provider.

Configure a GitHub App

The JUnit XML uses a private GitHub App to read the CODEOWNERS file.

1. Go to the GitHub integration tile.
2. Click Link GitHub Account.
3. Follow the instructions to configure the integration for a personal or organization account.
4. In Edit Permissions, grant Contents: Read access.
5. Click Create App in GitHub to finish the app creation process on GitHub.
6. Give the app a name, for example, Datadog Test Optimization.
7. Click Install GitHub App and follow the instructions on GitHub.

Manually providing the test.source.file tag

This is an alternative to using the GitHub integration.

For those plugins that do not provide the file attribute in the XML report, you can provide the test.source.file tag. There is no need to provide the exact path to a specific file, you can use any syntax you would use in the CODEOWNERS file such as src/myTeamFolder or *.md.

There are multiple ways to provide the test.source.file tag:

• Using the --tags parameter or the DD_TAGS environment variable.

  datadog-ci junit upload --service service-name --tags test.source.file:src/myTeamFolder my_report.xml
  

  This adds the test.source.file tag to all the tests in the report. All of the tests will have the same owner(s).

• If you want to provide different source files for the same XML report, you can use property elements or set the file attribute manually to individual <testcase> or <testsuite> elements.

Providing metadata with XPath expressions

In addition to the --tags CLI parameter and the DD_TAGS environment variable, which apply custom tags globally to all tests included the uploaded XML report, the --xpath-tag parameter provides custom rules to add tags from different attributes within the XML to each test.

The parameter provided must have the format key=expression, where key is the name of the custom tag to be added and expression is a valid XPath expression within the ones supported.

While XPath syntax is used for familiarity, only the following expressions are supported:

/testcase/@attribute-name

The XML attribute from <testcase attribute-name="value">.

/testcase/../@attribute-name

The XML attribute from the parent <testsuite attribute-name="value"> of the current <testcase>.

/testcase/..//property[@name='property-name']

The value attribute from the <property name="property-name" value="value"> inside the parent <testsuite> of the current <testcase>.

/testcase//property[@name='property-name']

The value attribute from the <property name="property-name" value="value"> inside the current <testcase>.

Examples:

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite tests="1" failures="0" time="0.030000" name="value 1">
    <testcase classname="SomeTestSuiteClass" name="test_something" time="0.030000"></testcase>
  </testsuite>
  <testsuite tests="1" failures="0" time="0.021300" name="value 2">
    <testcase classname="OtherTestSuiteClass" name="test_something" time="0.021300"></testcase>
  </testsuite>
</testsuites>

datadog-ci junit upload --service service_name \
  --xpath-tag test.suite=/testcase/@classname ./junit.xml

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite tests="1" failures="0" time="0.020000" name="SomeTestSuiteClass">
    <testcase name="test_something" time="0.010000" attr="value 1"></testcase>
    <testcase name="test_other" time="0.010000" attr="value 2"></testcase>
  </testsuite>
</testsuites>

datadog-ci junit upload --service service_name \
  --xpath-tag custom_tag=/testcase/@attr ./junit.xml

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite tests="1" failures="0" time="0.030000" name="SomeTestSuiteClass">
    <properties>
      <property name="prop" value="value 1"></property>
    </properties>
    <testcase name="test_something" time="0.030000" attr="value 1"></testcase>
  </testsuite>
  <testsuite tests="1" failures="0" time="0.021300" name="OtherTestSuiteClass">
    <properties>
      <property name="prop" value="value 1"></property>
    </properties>
    <testcase name="test_something" time="0.021300" attr="value 1"></testcase>
  </testsuite>
</testsuites>

datadog-ci junit upload --service service_name \
  --xpath-tag custom_tag=/testcase/..//property[@name=\'prop\'] ./junit.xml

Providing metadata through property elements

Another way to provide additional tags to specific tests is including <property name="dd_tags[key]" value="value"> elements within the <testsuite> or <testcase> elements. If you add these tags to a <testcase> element, they are stored in its test span. If you add the tags to a <testsuite> element, they are stored in all of that suite’s test spans.

To be processed, the name attribute in the <property> element must have the format dd_tags[key], where key is the name of the custom tag to be added. Other properties are ignored.

Example: Adding tags to a <testcase> element.

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite tests="1" failures="0" time="0.030000" name="SomeTestSuiteClass">
    <testcase classname="SomeTestSuiteClass" name="test_something" time="0.010000">
      <properties>
        <property name="dd_tags[custom_tag]" value="some value"></property>
        <property name="dd_tags[runtime.name]" value="CPython"></property>
      </properties>
    </testcase>
  </testsuite>
</testsuites>

Example: Adding tags to a <testsuite> element.

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite tests="1" failures="0" time="0.030000" name="SomeTestSuiteClass">
    <properties>
      <property name="dd_tags[custom_tag]" value="some value"></property>
      <property name="dd_tags[runtime.name]" value="CPython"></property>
    </properties>
    <testcase classname="SomeTestSuiteClass" name="test_something" time="0.010000"></testcase>
  </testsuite>
</testsuites>

The values that you send to Datadog are strings, so the facets are displayed in lexicographical order. To send integers instead of strings, use the --measures flag and the DD_MEASURES environment variable.

Reporting code coverage

It is possible to report code coverage for a given JUnit report via the --report-measures option, by setting the test.code_coverage.lines_pct measure:

datadog-ci junit upload --service my-api-service --report-measures test.code_coverage.lines_pct:82 unit-tests/junit-reports e2e-tests/single-report.xml

For more information, see Code Coverage.

Further reading

Additional helpful documentation, links, and articles:

Explore Test Results and PerformanceDOCUMENTATION Troubleshooting Test OptimizationDOCUMENTATION