Add code coverage CI workflow.

Author: Jinge Wang

.github/workflows/code-coverage.yml

@@ -0,0 +1,34 @@
+# This workflow generate code coverage report and upload it to Codecov.
+
+name: Coverage
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+permissions:
+  contents: read
+
+jobs:
+  code-coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - run: chmod +x ./gradlew
+      - name: Generate code coverage report with JaCoCo
+        run: ./gradlew jacocoTestReport
+      - name: Upload report to Codecov
+        uses: codecov/codecov-action@v2
+        with:
+          files: ./build/reports/jacoco/test/jacocoTestReport.xml
+          flags: unittests
+          name: codecov-algorithms
+          fail_ci_if_error: true # Let CI fail if upload failed
+          verbose: true

.idea/misc.xml

@@ -8,6 +8,7 @@
 plugins {
     id 'java'
     id 'application'
+    id 'jacoco'
 }
 
 repositories {
@@ -38,4 +39,12 @@ tasks.named('test') {
 
 application {
     getMainClass().set(findProperty("className").toString())
+}
+
+jacocoTestReport {
+    reports {
+        xml.required = true
+    }
+    setSourceCompatibility(1.8)
+    dependsOn(test)
 }