Codecov Reports Incorrect Coverage Compared to JaCoCo Report

[waffiqaziz]

Description:

There is a discrepancy between the code coverage reported by Codecov and the actual JaCoCo coverage report generated locally and in GitHub Actions.

Issue Description

I am using GitHub Actions to run unit and instrumented tests for my Android project. The JaCoCo report generated in my CI environment consistently reports 73% code coverage, which matches the local report. However, when the same JaCoCo XML report is uploaded to Codecov, the Codecov dashboard displays only 62% coverage.

Codecov Test Coverage

Result of local test and artifact

Steps to Reproduce

• In my local machine and GitHub Actioni run unit tests and instrumented tests using ./gradlew JacocoDebugCodeCoverage.
• Generate the JaCoCo report and verify that it shows 73% coverage here.
• Upload the JaCoCo report to Codecov using the codecov/codecov-action@v5 GitHub Action.
• Check the reported coverage on Codecov.io—it incorrectly shows 62% here.

Expected Behavior

Codecov should display the same coverage percentage as the JaCoCo report, which is 73%.

Observed Behavior

Codecov incorrectly reports 62% coverage, which does not match the JaCoCo report.

Relevant Configuration

• GitHub Action Workflow runs on ubuntu-latest
• JaCoCo exclusions applied in build.gradle.kts:

val exclusions = listOf(
    "**/R.class",
    "**/R$*.class",
    "**/BuildConfig.*",
    "**/Manifest*.*",
    "**/*Test*.*",
    "**/hilt_aggregated_deps/**",
    "**/*_Provide*",
    "**/*_Factory*",
    "**/*Preview*",
    "**/*_*",
    "**/di/**"
)

• .codecov.yml settings:

ignore:
  - '**/R.class'
  - '**/R$*.class'
  - '**/BuildConfig.*'
  - '**/Manifest*.*'
  - '**/*Test*.*'
  - '**/hilt_aggregated_deps/**'
  - '**/*_Provide*.*'
  - '**/*_Factory*.*'
  - '**/*Preview*.*'
  - '**/*_*.*'
  - 'di/**'

Additional Information

• The madrapps/[email protected] GitHub Action correctly detects 73% and adds a PR comment with the correct coverage.
  
• The uploaded JaCoCo HTML report artifact also shows 73% when downloaded and viewed locally.
• The issue can be reproduced in this PR: waffiqaziz/HiltTestActivity#30
• Source result running: GitHub Actions Run