#1499 Add Protobuf builder integration test

* Don't run the ProtobufBuilderTest with the processor_plugin_java8 and eclipse_jdt_java_8 (processor plugin runs before the proto java classes are created and the eclipse plugin has some bug)
* Include *.proto for license checks

integrationtest/src/test/java/org/mapstruct/itest/tests/ProtobufBuilderTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.itest.tests;
+
+import org.junit.runner.RunWith;
+import org.mapstruct.itest.testutil.runner.ProcessorSuite;
+import org.mapstruct.itest.testutil.runner.ProcessorSuiteRunner;
+
+/**
+ * ECLIPSE_JDT_JAVA_8 is not working with Protobuf. Use all other available processor types.
+ *
+ * @author Christian Bandowski
+ */
+@RunWith(ProcessorSuiteRunner.class)
+@ProcessorSuite(baseDir = "protobufBuilderTest",
+    processorTypes = {
+        ProcessorSuite.ProcessorType.ORACLE_JAVA_6,
+        ProcessorSuite.ProcessorType.ORACLE_JAVA_7,
+        ProcessorSuite.ProcessorType.ORACLE_JAVA_8,
+        ProcessorSuite.ProcessorType.ORACLE_JAVA_9,
+        ProcessorSuite.ProcessorType.ECLIPSE_JDT_JAVA_6,
+        ProcessorSuite.ProcessorType.ECLIPSE_JDT_JAVA_7
+    })
+public class ProtobufBuilderTest {
+}

integrationtest/src/test/resources/protobufBuilderTest/pom.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright MapStruct Authors.
+
+    Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.mapstruct</groupId>
+        <artifactId>mapstruct-it-parent</artifactId>
+        <version>1.0.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>protobufIntegrationTest</artifactId>
+    <packaging>jar</packaging>
+
+    <properties>
+        <os.mavenplugin.version>1.6.0</os.mavenplugin.version>
+        <protobuf.mavenplugin.version>0.5.1</protobuf.mavenplugin.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>${os.mavenplugin.version}</version>
+            </extension>
+        </extensions>
+        <plugins>
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>${protobuf.mavenplugin.version}</version>
+                <executions>
+                    <execution>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                        <configuration>
+                            <protocArtifact>com.google.protobuf:protoc:3.2.0:exe:${os.detected.classifier}
+                            </protocArtifact>
+                            <pluginId>grpc-java</pluginId>
+                            <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.2.0:exe:${os.detected.classifier}
+                            </pluginArtifact>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

integrationtest/src/test/resources/protobufBuilderTest/src/main/java/org/mapstruct/itest/protobuf/AddressDto.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.itest.protobuf;
+
+public class AddressDto {
+
+    private String addressLine;
+
+    public AddressDto() {
+
+    }
+
+    public AddressDto(String addressLine) {
+        this.addressLine = addressLine;
+    }
+
+    public String getAddressLine() {
+        return addressLine;
+    }
+
+    public void setAddressLine(String addressLine) {
+        this.addressLine = addressLine;
+    }
+}

integrationtest/src/test/resources/protobufBuilderTest/src/main/java/org/mapstruct/itest/protobuf/PersonDto.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.itest.protobuf;
+
+public class PersonDto {
+    private String name;
+    private int age;
+    private AddressDto address;
+
+    public PersonDto() {
+    }
+
+    public PersonDto(String name, int age, AddressDto address) {
+        this.name = name;
+        this.age = age;
+        this.address = address;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public AddressDto getAddress() {
+        return address;
+    }
+
+    public void setAddress(AddressDto address) {
+        this.address = address;
+    }
+}

integrationtest/src/test/resources/protobufBuilderTest/src/main/java/org/mapstruct/itest/protobuf/PersonMapper.java

@@ -0,0 +1,19 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.itest.protobuf;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ReportingPolicy;
+import org.mapstruct.factory.Mappers;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE) // protobuf has a lot of strange additional setters/getters
+public interface PersonMapper {
+
+    PersonMapper INSTANCE = Mappers.getMapper( PersonMapper.class );
+
+    PersonProtos.Person fromDto(PersonDto personDto);
+    PersonDto toDto(PersonProtos.Person personDto);
+}

integrationtest/src/test/resources/protobufBuilderTest/src/main/proto/Person.proto

@@ -0,0 +1,21 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+syntax = "proto3";
+
+package itest.protobuf;
+
+option java_package = "org.mapstruct.itest.protobuf";
+option java_outer_classname = "PersonProtos";
+
+message Person {
+    string name = 1;
+    int32 age = 2;
+    Address address = 3;
+
+    message Address {
+        string addressLine = 1;
+    }
+}

integrationtest/src/test/resources/protobufBuilderTest/src/test/java/org/mapstruct/itest/protobuf/ProtobufMapperTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.itest.protobuf;
+
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Test for generation of Protobuf Builder Mapper implementations
+ *
+ * @author Christian Bandowski
+ */
+public class ProtobufMapperTest {
+
+    @Test
+    public void testSimpleImmutableBuilderHappyPath() {
+        PersonDto personDto = PersonMapper.INSTANCE.toDto( PersonProtos.Person.newBuilder()
+            .setAge( 33 )
+            .setName( "Bob" )
+            .setAddress( PersonProtos.Person.Address.newBuilder()
+                .setAddressLine( "Wild Drive" )
+                .build() )
+            .build() );
+
+        assertThat( personDto.getAge() ).isEqualTo( 33 );
+        assertThat( personDto.getName() ).isEqualTo( "Bob" );
+        assertThat( personDto.getAddress() ).isNotNull();
+        assertThat( personDto.getAddress().getAddressLine() ).isEqualTo( "Wild Drive" );
+    }
+
+    @Test
+    public void testLombokToImmutable() {
+        PersonProtos.Person person = PersonMapper.INSTANCE.fromDto( new PersonDto( "Bob", 33, new AddressDto( "Wild Drive" ) ) );
+
+        assertThat( person.getAge() ).isEqualTo( 33 );
+        assertThat( person.getName() ).isEqualTo( "Bob" );
+        assertThat( person.getAddress() ).isNotNull();
+        assertThat( person.getAddress().getAddressLine() ).isEqualTo( "Wild Drive" );
+    }
+}

parent/pom.xml

@@ -196,6 +196,11 @@
                 <artifactId>auto-value</artifactId>
                 <version>1.5</version>
             </dependency>
+            <dependency>
+                <groupId>com.google.protobuf</groupId>
+                <artifactId>protobuf-java</artifactId>
+                <version>3.6.0</version>
+            </dependency>
             <dependency>
                 <groupId>org.inferred</groupId>
                 <artifactId>freebuilder</artifactId>
@@ -576,7 +581,7 @@
                     <header>${basedir}/../etc/license.txt</header>
                     <strictCheck>true</strictCheck>
                     <excludes>
-                        <exclude>.idea/**</exclude>
+                        <exclude>**/.idea/**</exclude>
                         <exclude>**/build-config/checkstyle.xml</exclude>
                         <exclude>**/build-config/import-control.xml</exclude>
                         <exclude>copyright.txt</exclude>
@@ -601,6 +606,7 @@
                     </excludes>
                     <mapping>
                         <java>SLASHSTAR_STYLE</java>
+                        <proto>SLASHSTAR_STYLE</proto>
                     </mapping>
                 </configuration>
                 <executions>