Added test on copyVariant function

kover-gradle-plugin/examples/jvm/copy-variant/build.gradle.kts

@@ -0,0 +1,34 @@
+plugins {
+    kotlin("jvm") version "1.7.10"
+    id("org.jetbrains.kotlinx.kover") version "0.8.1"
+}
+
+dependencies {
+    implementation(project(":first"))
+    implementation(project(":second"))
+    testImplementation(kotlin("test"))
+}
+
+kover {
+    merge {
+        subprojects()
+
+        createVariant("aggregated") {
+            add("jvm")
+        }
+    }
+
+    currentProject {
+        copyVariant("first", "aggregated")
+        copyVariant("second", "aggregated")
+    }
+
+    reports {
+        variant("first") {
+            filters.includes.projects.add(":first")
+        }
+        variant("second") {
+            filters.includes.projects.add(":second")
+        }
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/first/build.gradle.kts

@@ -0,0 +1,7 @@
+plugins {
+    kotlin("jvm")
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}

kover-gradle-plugin/examples/jvm/copy-variant/first/src/main/kotlin/Utils.kt

@@ -0,0 +1,8 @@
+package kotlinx.kover.examples.merged.subproject.utils
+
+class SubprojectUtils {
+    fun minus(a: Int, b: Int): Int {
+        if (b < 0) return 0
+        return a - b
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/first/src/main/kotlin/kotlinx/kover/examples/merged/AppClasses.kt

@@ -0,0 +1,17 @@
+package kotlinx.kover.examples.merged
+
+class SubprojectFirstClass {
+    fun formatInt(i: Int): String {
+        if (i == 0) return "ZERO"
+        return if (i > 0) {
+            "POSITIVE=$i"
+        } else {
+            "NEGATIVE=${-i}"
+        }
+    }
+
+    fun printClass() {
+        val name = this::class.qualifiedName
+        println(name)
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/first/src/main/kotlin/kotlinx/kover/examples/merged/subproject/SubpackageClasses.kt

@@ -0,0 +1,18 @@
+package kotlinx.kover.examples.merged.subproject
+
+import kotlin.math.*
+
+class SubprojectSecondClass {
+    fun formatDouble(d: Double): String {
+        if (d.roundToInt().toDouble() == d) {
+            return "INTEGER=${d.roundToInt()}"
+        } else {
+            return "FRACTIONAL=$d"
+        }
+    }
+
+    fun printClass() {
+        val name = this::class.qualifiedName
+        println(name)
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/first/src/test/kotlin/TestClasses.kt

@@ -0,0 +1,11 @@
+package kotlinx.kover.examples.merged
+
+import kotlin.test.Test
+
+class TestClasses {
+    @Test
+    fun testThisProject() {
+        SubprojectFirstClass().printClass()
+    }
+
+}

kover-gradle-plugin/examples/jvm/copy-variant/second/build.gradle.kts

@@ -0,0 +1,3 @@
+plugins {
+    kotlin("jvm")
+}

kover-gradle-plugin/examples/jvm/copy-variant/second/src/main/kotlin/ClassFromSecondProject.kt

@@ -0,0 +1,7 @@
+package kotlinx.kover.examples.merged
+
+class ClassFromSecondProject {
+    fun foo() {
+        println("Hello")
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/settings.gradle.kts

@@ -0,0 +1,16 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        mavenCentral()
+    }
+}
+rootProject.name = "copy-variant"
+
+include(":first")
+include(":second")
+
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/src/main/kotlin/AppClasses.kt

@@ -0,0 +1,17 @@
+package kotlinx.kover.examples.merged
+
+class ExampleClass {
+    fun formatInt(i: Int): String {
+        if (i == 0) return "ZERO"
+        return if (i > 0) {
+            "POSITIVE=$i"
+        } else {
+            "NEGATIVE=${-i}"
+        }
+    }
+
+    fun printClass() {
+        val name = this::class.qualifiedName
+        println(name)
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/src/main/kotlin/kotlinx/kover/examples/merged/utils/Utils.kt

@@ -0,0 +1,8 @@
+package kotlinx.kover.examples.merged.utils
+
+class MergedUtils {
+    fun sum(a: Int, b: Int): Int {
+        if (a < 0 && b < 0) return 0
+        return a + b
+    }
+}

kover-gradle-plugin/examples/jvm/copy-variant/src/test/kotlin/TestClasses.kt

@@ -0,0 +1,22 @@
+package kotlinx.kover.examples.merged
+
+import kotlinx.kover.examples.merged.subproject.*
+import kotlin.test.Test
+
+class TestClasses {
+    @Test
+    fun testThisProject() {
+        ExampleClass().formatInt(50)
+    }
+
+    @Test
+    fun testExcludedProject() {
+        ClassFromSecondProject().foo()
+    }
+
+    @Test
+    fun testSubproject() {
+        SubprojectFirstClass().formatInt(42)
+        SubprojectSecondClass().formatDouble(4.2)
+    }
+}

kover-gradle-plugin/src/functionalTest/kotlin/kotlinx/kover/gradle/plugin/test/functional/cases/ExamplesBuildTests.kt

@@ -24,6 +24,21 @@ internal class ExamplesBuildTests {
         // build only
     }
 
+    @ExamplesTest("jvm/copy-variant", ["koverXmlReportFirst", "koverXmlReportSecond"])
+    fun CheckerContext.jvmCopyVariant() {
+        xmlReport("first") {
+            // only classes from `first` project are present
+            classCounter("kotlinx.kover.examples.merged.SubprojectFirstClass").assertCovered()
+            classCounter("kotlinx.kover.examples.merged.ClassFromSecondProject").assertAbsent()
+        }
+
+        xmlReport("second") {
+            // only classes from `second` project are present
+            classCounter("kotlinx.kover.examples.merged.SubprojectFirstClass").assertAbsent()
+            classCounter("kotlinx.kover.examples.merged.ClassFromSecondProject").assertCovered()
+        }
+    }
+
     @ExamplesTest("android/minimal_groovy")
     fun CheckerContext.androidGroovy() {
         // build only

kover-gradle-plugin/src/main/kotlin/kotlinx/kover/gradle/plugin/appliers/FinalizeKover.kt

@@ -58,13 +58,6 @@ internal fun KoverContext.finalizing(origins: AllVariantOrigins) {
     jvmVariant?.let { variantArtifacts[JVM_VARIANT_NAME] = it }
     androidVariants.forEach { variantArtifacts[it.variantName] = it }
 
-    val availableVariants = variantArtifacts.keys + projectExtension.currentProject.customVariants.keys
-    projectExtension.reports.byName.forEach { (requestedVariant, _) ->
-        if (requestedVariant !in availableVariants) {
-            throw KoverIllegalConfigException("It is not possible to configure the '$requestedVariant' variant because it does not exist")
-        }
-    }
-
     val totalVariant =
         TotalVariantArtifacts(project, toolProvider, koverBucketConfiguration, variantConfig(TOTAL_VARIANT_NAME), projectExtension)
     variantArtifacts.values.forEach { totalVariant.mergeWith(it) }