Add a test for javaPackagePrefix

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KotlinGradlePluginIT.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.gradle
 import org.gradle.api.logging.LogLevel
 import org.jetbrains.kotlin.com.intellij.openapi.util.io.FileUtil
 import org.jetbrains.kotlin.gradle.tasks.USING_INCREMENTAL_COMPILATION_MESSAGE
+import org.jetbrains.kotlin.gradle.util.checkBytecodeContains
 import org.jetbrains.kotlin.gradle.util.getFileByName
 import org.jetbrains.kotlin.gradle.util.getFilesByNames
 import org.jetbrains.kotlin.gradle.util.modify
@@ -582,4 +583,17 @@ class KotlinGradleIT: BaseGradleIT() {
             assertFileExists("build/classes/kotlin/deploy/META-INF/${archivesBaseName}_deploy.kotlin_module")
         }
     }
+
+    @Test
+    fun testJavaPackagePrefix() {
+        val project = Project("javaPackagePrefix", "4.0")
+        project.build("build") {
+            assertSuccessful()
+
+            // Check that the Java source in a non-full-depth package structure was located correctly:
+            checkBytecodeContains(
+                    File(project.projectDir, "build/classes/kotlin/main/my/pack/name/app/MyApp.class"),
+                    "my/pack/name/util/JUtil.util")
+        }
+    }
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/javaPackagePrefix/build.gradle

@@ -0,0 +1,21 @@
+buildscript {
+    repositories {
+        mavenLocal()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+apply plugin: 'java'
+apply plugin: 'kotlin'
+
+repositories {
+    mavenLocal()
+}
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+}
+
+compileKotlin.javaPackagePrefix = "my.pack.name"

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/javaPackagePrefix/src/main/java/app/App.kt

@@ -0,0 +1,10 @@
+package my.pack.name.app
+
+import my.pack.name.util.Appender
+import my.pack.name.util.JUtil
+
+class MyApp {
+    fun method(arg: String): String {
+        return JUtil.util() + Appender().append(arg)
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/javaPackagePrefix/src/main/java/util/Appender.kt

@@ -0,0 +1,5 @@
+package my.pack.name.util
+
+class Appender {
+    fun append(arg: String): String = "Hello, $arg"
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/javaPackagePrefix/src/main/java/util/JUtil.java

@@ -0,0 +1,7 @@
+package my.pack.name.util;
+
+public class JUtil {
+    public static String util() {
+        return "Some string";
+    }
+}