Check Java interop in Maven IC tests

libraries/tools/kotlin-maven-plugin-test/src/test/java/org.jetbrains.kotlin.maven/IncrementalCompilationIT.java

@@ -21,7 +21,9 @@ public class IncrementalCompilationIT extends MavenITBase {
             "target/classes/test.properties",
             "target/classes/A.class",
             "target/classes/UseAKt.class",
-            "target/classes/Dummy.class"
+            "target/classes/Dummy.class",
+            "target/classes/JavaUtil.class",
+            "target/classes/JavaAUser.class"
         };
     }
 
@@ -73,4 +75,18 @@ public class IncrementalCompilationIT extends MavenITBase {
 
         // todo rebuild and compare output
     }
+
+    @Test
+    public void testJavaChanged() throws Exception {
+        MavenProject project = new MavenProject("kotlinSimple");
+        project.exec("package");
+
+        File aKt = project.file("src/main/java/JavaUtil.java");
+        MavenTestUtils.replaceFirstInFile(aKt, "CONST = 0", "CONST = 1");
+
+        project.exec("package")
+                .succeeded()
+                .filesExist(kotlinSimpleOutputPaths())
+                .compiledKotlin("src/main/kotlin/A.kt");
+    }
 }

libraries/tools/kotlin-maven-plugin-test/src/test/java/org.jetbrains.kotlin.maven/MavenExecutionResult.java

@@ -2,6 +2,7 @@ package org.jetbrains.kotlin.maven;
 
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
+import kotlin.text.StringsKt;
 import org.jetbrains.annotations.NotNull;
 import org.junit.Assert;
 
@@ -91,6 +92,8 @@ class MavenExecutionResult {
                 while (m.find()) {
                     String[] compiledFiles = m.group(1).split(",");
                     for (String path : compiledFiles) {
+                        if (StringsKt.isBlank(path)) continue;
+
                         File file = new File(path.trim());
                         String relativePath = FileUtil.getRelativePath(workingDir, file);
                         normalizedActualPaths.add(FileUtil.normalize(relativePath));

libraries/tools/kotlin-maven-plugin-test/src/test/resources/kotlinSimple/pom.xml

@@ -21,8 +21,6 @@
     </dependencies>
 
     <build>
-        <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
-
         <pluginManagement>
             <plugins>
                 <plugin>
@@ -50,17 +48,50 @@
                 <executions>
                     <execution>
                         <id>compile</id>
-                        <phase>process-sources</phase>
-                        <goals>
-                            <goal>compile</goal>
-                        </goals>
+                        <goals> <goal>compile</goal> </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
                     </execution>
                     <execution>
                         <id>test-compile</id>
-                        <phase>process-test-sources</phase>
-                        <goals>
-                            <goal>test-compile</goal>
-                        </goals>
+                        <goals> <goal>test-compile</goal> </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <executions>
+                    <!-- Replacing default-compile as it is treated specially by maven -->
+                    <execution>
+                        <id>default-compile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <!-- Replacing default-testCompile as it is treated specially by maven -->
+                    <execution>
+                        <id>default-testCompile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>java-compile</id>
+                        <phase>compile</phase>
+                        <goals> <goal>compile</goal> </goals>
+                    </execution>
+                    <execution>
+                        <id>java-test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals> <goal>testCompile</goal> </goals>
                     </execution>
                 </executions>
             </plugin>

libraries/tools/kotlin-maven-plugin-test/src/test/resources/kotlinSimple/src/main/java/JavaAUser.java

@@ -0,0 +1,5 @@
+public class JavaAUser {
+    public static void useA(A a) {
+        a.foo("abc");
+    }
+}

libraries/tools/kotlin-maven-plugin-test/src/test/resources/kotlinSimple/src/main/java/JavaUtil.java

@@ -0,0 +1,3 @@
+public class JavaUtil {
+    public static final int CONST = 0;
+}

libraries/tools/kotlin-maven-plugin-test/src/test/resources/kotlinSimple/src/main/kotlin/A.kt

@@ -1,3 +1,4 @@
 class A {
     fun foo(s: String) = s + s
+    fun bar() = JavaUtil.CONST
 }