Code coverage

.codecov.yml

@@ -0,0 +1,9 @@
+coverage:
+  precision: 2
+  round: down
+  range: "70...90"
+  status:
+    project:
+      default:
+        target: auto    # the required coverage value
+        threshold: 0.2%  # the leniency in hitting the target

.github/workflows/build.yml

@@ -21,3 +21,7 @@ jobs:
       - name: Run Gradle Check
         run: |
           ./gradlew check
+      - name: Upload Coverage Report
+        uses: codecov/[email protected]
+        with:
+          file: ./build/reports/jacoco/test/jacocoTestReport.xml

README.md

@@ -1,3 +1,5 @@
+[![codecov](https://codecov.io/gh/opensearch-project/opensearch-sdk-java/branch/main/graph/badge.svg)](https://codecov.io/gh/opensearch-project/opensearch-sdk-java)
+
 # OpenSearch SDK
 - [Introduction](#introduction)
 - [Contributing](#contributing)

build.gradle

@@ -12,6 +12,7 @@
 plugins {
     id 'java'
     id "com.diffplug.spotless" version "6.3.0" apply false
+    id 'jacoco'
 }
 
 
@@ -112,4 +113,15 @@ test {
         events "passed", "skipped", "failed"
         exceptionFormat "full"
     }
+    jacoco {
+        classDumpDir = file("$buildDir/jacoco/classpathdumps")
+    }
+    finalizedBy jacocoTestReport
 }
+
+jacocoTestReport {
+    dependsOn test
+    reports {
+        xml.required = true
+    }
+}