jacoco

Check JaCoCo Code Coverage

Try it: /maven-quality:jacoco payment-service — or say "what's our test coverage on the payment service?".

Run verify to generate coverage reports, then parse and display the results. Defaults target a Maven/Java project with the JaCoCo plugin bound so that verify produces target/site/jacoco/jacoco.xml.

Coverage gate: 80% line coverage (default)

Adjust THRESHOLD in the snippets below to match your project's gate.

Adjusting for your project

• Maven invocation: examples use the wrapper ./mvnw. If your environment has no wrapper, substitute your mvn binary, e.g. bash "/path/to/mvn" verify -f pom.xml -q.
• Single module / non-modular project: the report lives at target/site/jacoco/jacoco.xml. Set modules = ['.'] and use '.'/target/... paths, or just drop the module prefix.
• Multi-module project: set the modules list to your module directory names, or pass one module as the argument to scope to it.
• $ARGUMENTS (when present) is treated as either a module name (Steps 1, 2, 5, 7) or a class source-file name (Step 4).

Step 1: Generate coverage reports

Specific module (e.g. argument = my-core):

./mvnw verify -pl $ARGUMENTS -q

All modules / whole project:

./mvnw clean verify -q

Step 2: Module-level summary (PASS/FAIL vs gate)

python3 -c "
import xml.etree.ElementTree as ET

THRESHOLD = 80
# Adjust to your module directory names, or use ['.'] for a single-module project.
modules = ['module-a', 'module-b', 'module-c']
if '$ARGUMENTS':
    modules = ['$ARGUMENTS']

print(f'{\"Module\":<24} {\"Covered\":>8} {\"Total\":>8} {\"Coverage\":>10} {\"Status\":>8}')
print('-' * 62)
for module in modules:
    path = f'{module}/target/site/jacoco/jacoco.xml' if module != '.' else 'target/site/jacoco/jacoco.xml'
    try:
        root = ET.parse(path).getroot()
        for counter in root.findall('counter'):
            if counter.get('type') == 'LINE':
                missed = int(counter.get('missed'))
                covered = int(counter.get('covered'))
                total = missed + covered
                pct = covered / total * 100 if total > 0 else 0
                status = 'PASS' if pct >= THRESHOLD else 'FAIL'
                print(f'{module:<24} {covered:>8} {total:>8} {pct:>9.2f}% {status:>8}')
    except FileNotFoundError:
        print(f'{module:<24} {\"N/A\":>8} {\"N/A\":>8} {\"N/A\":>10} {\"MISSING\":>8}')
"