Add jacoco coverage

build.gradle

@@ -180,8 +180,11 @@ allprojects {
             }
         }
     }
+
+
 }
 
+
 task rootAllTest(type: org.jetbrains.kotlin.gradle.testing.internal.KotlinTestReport) {
     def rootAllTest = it
     destinationDir = new File(project.buildDir, "reports/tests/rootAllTest")
@@ -256,3 +259,70 @@ afterEvaluate {
         reportUndocumented = false
     }
 }
+
+allprojects {
+    apply plugin: "jacoco"
+
+    jacoco {
+        toolVersion = "0.8.5"
+        reportsDir = file("${buildDir}/jacoco-reports")
+    }
+}
+
+subprojects {
+    task testCoverage(type: JacocoReport, dependsOn: jvmTest) {
+        group = "Reporting"
+        description = "Generate Jacoco coverage reports."
+
+        def coverageSourceDirs = [
+            "common/src",
+            "jvm/src"
+        ]
+        classDirectories.from files(fileTree(dir: "${buildDir}/classes/kotlin/jvm/"))
+        sourceDirectories.from files(coverageSourceDirs)
+        additionalSourceDirs.from files(coverageSourceDirs)
+        executionData.from files("${buildDir}/jacoco/jvmTest.exec")
+
+        reports {
+            xml.enabled true
+            csv.enabled false
+            html.enabled true
+
+            html.destination file("${buildDir}/jacoco-reports/html")
+        }
+    }
+}
+
+def findSources(sourceSet) {
+    return files(subprojects.findResults {
+        it.kotlin.sourceSets.findByName("jvmMain")?.kotlin?.srcDirs
+    })
+}
+
+task testCoverage(type: JacocoReport) {
+    group = "Reporting"
+    description = "Generate Jacoco coverage reports."
+    dependsOn subprojects.testCoverage
+
+    def coverageSourceDirs = (
+        findSources("commonMain") + findSources("jvmMain") + findSources("commonTest") + findSources("jvmTest")
+    )
+
+    def classes = files(subprojects.collect {
+        files(fileTree(dir: "${it.buildDir}/classes/kotlin/jvm"))
+    })
+
+    def samples = files(subprojects.testCoverage.executionData).findAll { it.exists() }
+
+    classDirectories.from files(classes)
+    sourceDirectories.from files(coverageSourceDirs)
+    additionalSourceDirs.from files(coverageSourceDirs)
+    executionData.from(samples)
+
+    reports {
+        xml.enabled true
+        csv.enabled false
+        html.enabled true
+        html.destination file("${buildDir}/jacoco-reports/html")
+    }
+}

ktor-server/ktor-server-jetty/jvm/test/io/ktor/tests/server/jetty/JettyEngineTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package io.ktor.tests.server.jetty

ktor-server/ktor-server-jetty/jvm/test/io/ktor/tests/server/jetty/JettyServletContainerEngineTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package io.ktor.tests.server.jetty
@@ -13,10 +13,14 @@ import org.junit.*
 import javax.servlet.*
 
 class JettyAsyncServletContainerEngineTest :
-    EngineTestSuite<JettyApplicationEngineBase, JettyApplicationEngineBase.Configuration>(Servlet(async = true))
+    EngineTestSuite<JettyApplicationEngineBase, JettyApplicationEngineBase.Configuration>(
+        Servlet(async = true)
+    )
 
 class JettyBlockingServletContainerEngineTest :
-    EngineTestSuite<JettyApplicationEngineBase, JettyApplicationEngineBase.Configuration>(Servlet(async = false)) {
+    EngineTestSuite<JettyApplicationEngineBase, JettyApplicationEngineBase.Configuration>(
+        Servlet(async = false)
+    ) {
     @Ignore
     override fun testUpgrade() {
     }

ktor-server/ktor-server-jetty/jvm/test/io/ktor/tests/server/jetty/JettyStressTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package io.ktor.tests.server.jetty

ktor-server/ktor-server-jetty/jvm/test/io/ktor/tests/server/jetty/MultipleDispatchOnTimeout.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package io.ktor.tests.server.jetty

ktor-server/ktor-server-jetty/jvm/test/io/ktor/tests/server/jetty/WebResourcesTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package io.ktor.tests.server.jetty

ktor-server/ktor-server-jetty/ktor-server-jetty-test-http2/jvm/test/io/ktor/tests/server/jetty/http2/JettyEngineTest.kt

@@ -1,8 +1,8 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
-package io.ktor.tests.server.jetty
+package io.ktor.tests.server.jetty.http2
 
 import io.ktor.server.jetty.*
 import io.ktor.server.testing.*

ktor-server/ktor-server-jetty/ktor-server-jetty-test-http2/jvm/test/io/ktor/tests/server/jetty/http2/JettyServletContainerEngineTest.kt

@@ -2,7 +2,7 @@
  * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
-package io.ktor.tests.server.jetty
+package io.ktor.tests.server.jetty.http2
 
 import io.ktor.server.engine.*
 import io.ktor.server.jetty.*

ktor-server/ktor-server-jetty/ktor-server-jetty-test-http2/jvm/test/io/ktor/tests/server/jetty/http2/MultipleDispatchOnTimeout.kt

@@ -1,8 +1,8 @@
 /*
- * Copyright 2014-2019 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2014-2020 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
-package io.ktor.tests.server.jetty
+package io.ktor.tests.server.jetty.http2
 
 import io.ktor.application.*
 import io.ktor.response.*