Add test coverage

Author: aesy

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up environment
       uses: actions/setup-java@v1
       with:
-        java-version: ${{java-version}}
+        java-version: ${{ matrix.java-version }}
     - name: Build with Gradle
       run: ./gradlew buildPlugin
   test:
@@ -32,3 +32,7 @@ jobs:
         java-version: 11
     - name: Test with Gradle
       run: ./gradlew test --info
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        file: build/reports/jacoco/test/jacocoTestReport.xml

README.md

@@ -6,6 +6,7 @@ This plugin adds an intention to open regular expressions on regex101.com
 [![Plugin downloads](https://img.shields.io/jetbrains/plugin/d/14461-open-regex101?style=flat-square)](https://plugins.jetbrains.com/plugin/14461-open-regex101)
 [![Plugin stars](https://img.shields.io/jetbrains/plugin/r/stars/14461-open-regex101?style=flat-square)](https://plugins.jetbrains.com/plugin/14461-open-regex101)
 [![Build status](https://img.shields.io/github/workflow/status/aesy/regex101-intellij/Continous%20Integration?style=flat-square)](https://github.com/aesy/regex101-intellij/actions)
+[![Test coverage](https://img.shields.io/codecov/c/github/aesy/regex101-intellij?style=flat-square)](https://codecov.io/github/aesy/regex101-intellij)
 [![MIT license](https://img.shields.io/github/license/aesy/regex101-intellij.svg?style=flat-square)](https://github.com/aesy/regex101-intellij/blob/master/LICENSE)
 
 ## Installation

build.gradle.kts

@@ -2,6 +2,7 @@ import org.jetbrains.intellij.tasks.*
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
+    jacoco
     kotlin("jvm") version "1.3.61"
     id("org.jetbrains.intellij") version "0.4.21"
 }
@@ -30,6 +31,12 @@ intellij {
 }
 
 tasks {
+    jacocoTestReport {
+        reports {
+            xml.isEnabled = true
+        }
+    }
+
     withType<Wrapper> {
         gradleVersion = "6.5"
     }
@@ -47,6 +54,7 @@ tasks {
 
     withType<Test> {
         useJUnitPlatform()
+        finalizedBy(jacocoTestReport)
     }
 
     withType<PublishTask> {