Add Kover check (#250)

## Motivation and Context

Make sure, that code is properly tested

## How Has This Been Tested?

Run `./gradlew clean ktlintCheck build koverVerify koverLog
koverHtmlReport` on CI

## Changes

- Integrate Kover plugin for code coverage analysis
- Publish Html report
- Run `./gradlew clean ktlintCheck build koverVerify koverLog
koverHtmlReport` on CI

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Build tooling update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

Author: kpavlov

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: macos-latest
     name: Validate PR
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up JDK 21
         uses: actions/setup-java@v5
@@ -32,14 +32,16 @@ jobs:
           cache-read-only: true
 
       - name: Build with Gradle
-        run: ./gradlew clean build
+        run: ./gradlew clean ktlintCheck build koverLog koverHtmlReport
 
-      - name: Upload JUnit test results
+      - name: Upload Reports
         if: always()
         uses: actions/upload-artifact@v4
         with:
           name: junit-results
-          path: '**/build/test-results/test/*.xml'
+          path: |
+            **/build/test-results/test/*.xml
+            build/reports
 
       - name: Disable Auto-Merge on Fail
         if: failure() && github.event_name == 'pull_request'

build.gradle.kts

@@ -1,12 +1,38 @@
 plugins {
     alias(libs.plugins.ktlint)
+    alias(libs.plugins.kover)
 }
 
 allprojects {
     group = "io.modelcontextprotocol"
     version = "0.6.0"
 }
 
+dependencies {
+    kover(project(":kotlin-sdk-core"))
+    kover(project(":kotlin-sdk-client"))
+    kover(project(":kotlin-sdk-server"))
+    kover(project(":kotlin-sdk-test"))
+}
+
 subprojects {
     apply(plugin = "org.jlleitschuh.gradle.ktlint")
+    apply(plugin = "org.jetbrains.kotlinx.kover")
+}
+
+kover {
+    reports {
+        filters {
+            includes.classes("io.modelcontextprotocol.kotlin.sdk.*")
+        }
+        total {
+            log {
+            }
+            verify {
+                rule {
+                    minBound(65)
+                }
+            }
+        }
+    }
 }

gradle/libs.versions.toml

@@ -4,6 +4,7 @@ kotlin = "2.2.0"
 dokka = "2.0.0"
 atomicfu = "0.29.0"
 ktlint = "13.0.0"
+kover = "0.9.1"
 
 # libraries version
 serialization = "1.9.0"
@@ -59,6 +60,7 @@ ktor-serialization-kotlinx-json = { group = "io.ktor", name = "ktor-serializatio
 [plugins]
 kotlinx-binary-compatibility-validator = { id = "org.jetbrains.kotlinx.binary-compatibility-validator", version.ref = "binaryCompatibilityValidatorPlugin" }
 ktlint = { id = "org.jlleitschuh.gradle.ktlint", version.ref = "ktlint" }
+kover = { id = "org.jetbrains.kotlinx.kover", version.ref = "kover" }
 
 # Samples
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }