Setup Coverage

Setup Coverage

Glossary: See glossary.md for shared definitions of Codacy concepts (issues, findings, severity, coverage, tools, patterns, etc.).

This skill sets up test coverage reporting in a repository and configures automatic upload to Codacy. It detects what exists, identifies what is missing, and fills the gaps.

Prerequisites

• CODACY_PROJECT_TOKEN or CODACY_API_TOKEN must be available for coverage uploads (see Authentication)
• The repository must be added to Codacy

Workflow

Coverage Setup Progress:
- [ ] Step 1: Detect testing setup
- [ ] Step 2: Detect CI/CD pipeline
- [ ] Step 3: Identify coverage gaps
- [ ] Step 4: Add coverage generation
- [ ] Step 5: Add Codacy coverage upload
- [ ] Step 6: Verify the setup

Step 1: Detect testing setup

Scan the repository to identify:

• Languages in use (check file extensions, build files, package manifests)
• Test frameworks (look for test directories, test files, framework configs):
  • JavaScript/TypeScript: Jest, Vitest, Mocha, NYC/Istanbul, c8
  • Python: pytest, unittest, coverage.py
  • Java: JUnit, JaCoCo, Maven Surefire/Failsafe
  • Kotlin: JUnit, JaCoCo (Gradle or Maven)
  • Android: JUnit, JaCoCo, Espresso, createDebugCoverageReport
  • Go: native go test
  • Ruby: RSpec, SimpleCov, Minitest
  • C#/.NET: xUnit, NUnit, MSTest, Coverlet, dotCover
  • Scala: sbt-jacoco, scoverage
  • PHP: PHPUnit
  • Swift/Obj-C: XCTest, Xcode Code Coverage
• Existing coverage configuration (NYC config, Jest collectCoverage, pytest.ini coverage settings, JaCoCo plugin in pom.xml/build.gradle, etc.)
• Existing coverage reports (look for coverage/, lcov.info, cobertura.xml, jacoco*.xml, etc.)

Report findings to the user before proceeding.

Step 2: Detect CI/CD pipeline

Identify which CI/CD system is in use:

Read the CI config to understand:

• Which step runs tests
• Whether coverage is already being generated
• Whether there is already a coverage upload step
• What environment variables or secrets are configured

Step 3: Identify coverage gaps

Based on steps 1 and 2, determine what is missing:

1. No tests at all — inform the user that tests are needed first. Offer to set up the testing framework skeleton but clarify that actual tests must be written.
2. Tests exist but no coverage generation — coverage tooling needs to be added (Step 4).
3. Coverage is generated but not uploaded to Codacy — upload step needs to be added (Step 5).
4. Coverage is generated and uploaded but not working — troubleshoot using the Troubleshooting section.

Present the gap analysis to the user and confirm the plan before making changes.

Step 4: Add coverage generation

Add the minimal configuration to generate coverage reports in a format Codacy supports. Choose the format based on the language and tooling. See references/coverage-formats.md for the full format reference.

Language-specific setup

JavaScript/TypeScript (Jest):

// In package.json or jest.config.js
{
  "collectCoverage": true,
  "coverageReporters": ["lcov"]
}

Or run: npx jest --coverage --coverageReporters=lcov

JavaScript/TypeScript (Vitest):

// vitest.config.ts
{ test: { coverage: { reporter: ['lcov'] } } }

Python (pytest + coverage.py):

pip install pytest-cov
pytest --cov --cov-report=xml:cobertura.xml

Java (Maven + JaCoCo): Add the JaCoCo Maven plugin to pom.xml:

<plugin>
  <groupId>org.jacoco</groupId>
  <artifactId>jacoco-maven-plugin</artifactId>
  <version>0.8.12</version>
  <executions>
    <execution>
      <goals><goal>prepare-agent</goal></goals>
    </execution>
    <execution>
      <id>report</id>
      <phase>test</phase>
      <goals><goal>report</goal></goals>
    </execution>
  </executions>
</plugin>

Java (Gradle + JaCoCo):

plugins { id 'jacoco' }
jacocoTestReport { dependsOn test }

Run: ./gradlew test jacocoTestReport

Kotlin (Gradle + JaCoCo):

plugins { id 'jacoco' }
jacocoTestReport {
    dependsOn test
    reports { xml.required = true }
}

Run: ./gradlew test jacocoTestReport

Report location: build/reports/jacoco/test/jacocoTestReport.xml

Kotlin (Maven + JaCoCo): Same as Java Maven + JaCoCo setup above — JaCoCo supports Kotlin bytecode natively.

Android (Gradle + JaCoCo):

android {
    buildTypes {
        debug { testCoverageEnabled true }
    }
}

Run: ./gradlew createDebugCoverageReport

Report location: app/build/reports/coverage/debug/report.xml

For multi-module Android projects, use a merged report or partial uploads (see references/coverage-upload.md).

Go:

go test -coverprofile=coverage.out ./...

Ruby (SimpleCov):

# At the top of spec/spec_helper.rb or test/test_helper.rb
require 'simplecov'
SimpleCov.start
SimpleCov.formatter = SimpleCov::Formatter::CoberturaFormatter

Requires simplecov and simplecov-cobertura gems.

C#/.NET (Coverlet):

dotnet test --collect:"XPlat Code Coverage" -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=cobertura

Scala (sbt-jacoco): Add to project/plugins.sbt:

addSbtPlugin("com.github.sbt" % "sbt-jacoco" % "3.5.0")

Run: sbt jacoco

PHP (PHPUnit):

phpunit --coverage-clover clover.xml

Step 5: Add Codacy coverage upload

Add a coverage upload step to the CI/CD pipeline after the test/coverage step.

Authentication

The upload requires one of:

Option A — Repository token (single repo, simpler):

• Set CODACY_PROJECT_TOKEN as a CI/CD secret
• Obtain from: Codacy > Repository Settings > Coverage > Repository API Token

Option B — Account token (multiple repos):

• Set these CI/CD secrets:
  • CODACY_API_TOKEN — from Codacy > My Account > Access Management
  • CODACY_ORGANIZATION_PROVIDER — gh, gl, or bb
  • CODACY_USERNAME — organization or username
  • CODACY_PROJECT_NAME — repository name

Always remind the user to add the appropriate token as a CI/CD secret.

Upload command

The standard upload command:

bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r <coverage-report-file>

For Go coverage, add the parser flag:

bash <(curl -Ls https://coverage.codacy.com/get.sh) report \
  --force-coverage-parser go -r coverage.out

For multiple reports (e.g., monorepos or multi-module projects):

bash <(curl -Ls https://coverage.codacy.com/get.sh) report \
  -r report1.xml -r report2.xml

Or use partial uploads:

bash <(curl -Ls https://coverage.codacy.com/get.sh) report --partial -r report1.xml
bash <(curl -Ls https://coverage.codacy.com/get.sh) report --partial -r report2.xml
bash <(curl -Ls https://coverage.codacy.com/get.sh) final

CI/CD-specific integration

GitHub Actions:

- name: Upload coverage to Codacy
  env:
    CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_PROJECT_TOKEN }}
  run: bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r <report-file>

Or use the official action:

- name: Upload coverage to Codacy
  uses: codacy/codacy-coverage-reporter-action@v1
  with:
    project-token: ${{ secrets.CODACY_PROJECT_TOKEN }}
    coverage-reports: <report-file>

GitLab CI:

upload-coverage:
  stage: test
  script:
    - bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r <report-file>
  variables:
    CODACY_PROJECT_TOKEN: $CODACY_PROJECT_TOKEN

CircleCI (using orb):

orbs:
  codacy: codacy/coverage-reporter@13
workflows:
  main:
    jobs:
      - test
      - codacy/upload_coverage:
          requires: [test]

Travis CI:

after_success:
  - bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r <report-file>

Bitbucket Pipelines:

- step:
    name: Upload coverage
    script:
      - bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r <report-file>

Alpine Linux (no bash):

wget -qO - https://coverage.codacy.com/get.sh | sh -s -- report -r <report-file>

See references/coverage-upload.md for advanced upload scenarios.

Step 6: Verify the setup

After making changes:

1. Confirm the CI config is valid — check for YAML syntax errors and logical issues
2. List what the user needs to do manually:
   • Add CODACY_PROJECT_TOKEN (or account token variables) as a CI/CD secret
   • Push the changes to trigger a CI run
   • Check Codacy for coverage data after the pipeline completes
3. Provide a verification checklist:

   After pushing, verify:
   - [ ] CI pipeline passes (tests run, coverage report generated)
   - [ ] Coverage upload step succeeds (no errors in CI logs)
   - [ ] Codacy shows coverage data for the commit
   

Troubleshooting

Common issues and their solutions:

Important notes

• Coverage must be uploaded for every push to be useful for PR analysis — configure it to run on all branches, not just main
• For PR coverage metrics, Codacy needs coverage for both the PR head commit and the common ancestor commit with the target branch
• File paths in coverage reports must be relative to the repository root
• Coverage for multiple languages requires separate -l <Language> flags or partial uploads with language specification