Create tests

Author: alexengrig

build.gradle

@@ -19,12 +19,20 @@ repositories {
 ext {
     set('mapstructVersion', '1.5.3.Final')
     set('mapstructLombokVersion', '0.2.0')
+    set('lombokVersion', '1.18.24')
+    set('springBootVersion', '3.0.1')
 }
 
 dependencies {
     api "org.mapstruct:mapstruct:${mapstructVersion}"
     api "org.mapstruct:mapstruct-processor:${mapstructVersion}"
     api "org.projectlombok:lombok-mapstruct-binding:${mapstructLombokVersion}"
+
+    testAnnotationProcessor "org.mapstruct:mapstruct-processor:${mapstructVersion}"
+    testAnnotationProcessor "org.projectlombok:lombok-mapstruct-binding:${mapstructLombokVersion}"
+    testAnnotationProcessor "org.projectlombok:lombok:${lombokVersion}"
+    testCompileOnly "org.projectlombok:lombok:${lombokVersion}"
+    testImplementation "org.springframework.boot:spring-boot-starter-test:${springBootVersion}"
 }
 
 test {

src/test/java/dev/alexengrig/mapstruct/spring/domain/MyDomain.java

@@ -0,0 +1,19 @@
+package dev.alexengrig.mapstruct.spring.domain;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class MyDomain {
+
+    private Long id;
+    private String value;
+    private long size;
+    private boolean archived;
+
+}

src/test/java/dev/alexengrig/mapstruct/spring/dto/MyDto.java

@@ -0,0 +1,17 @@
+package dev.alexengrig.mapstruct.spring.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class MyDto {
+
+    private Long id;
+    private String value;
+
+}

src/test/java/dev/alexengrig/mapstruct/spring/mapper/MySimpleMapper.java

@@ -0,0 +1,17 @@
+package dev.alexengrig.mapstruct.spring.mapper;
+
+import dev.alexengrig.mapstruct.spring.config.SpringMapStructConfig;
+import dev.alexengrig.mapstruct.spring.domain.MyDomain;
+import dev.alexengrig.mapstruct.spring.dto.MyDto;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+
+@Mapper(config = SpringMapStructConfig.class)
+interface MySimpleMapper extends SimpleMapper<MyDto, MyDomain> {
+
+    @Mapping(target = "size", expression = "java(myDto.getValue() != null ? myDto.getValue().length() : -1)")
+    @Mapping(target = "archived", constant = "false")
+    @Override
+    MyDomain map(MyDto myDto);
+
+}

src/test/java/dev/alexengrig/mapstruct/spring/mapper/MySimpleMapperTest.java

@@ -0,0 +1,28 @@
+package dev.alexengrig.mapstruct.spring.mapper;
+
+import dev.alexengrig.mapstruct.spring.domain.MyDomain;
+import dev.alexengrig.mapstruct.spring.dto.MyDto;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+@SpringBootTest(classes = MapStructMySimpleMapper.class)
+class MySimpleMapperTest {
+
+    @Test
+    void should_map_dto_to_domain(@Autowired MySimpleMapper mapper) {
+        MyDto dto = MyDto.builder()
+                .id(1L)
+                .value("one")
+                .build();
+        MyDomain domain = mapper.map(dto);
+        assertEquals(1L, domain.getId());
+        assertEquals("one", domain.getValue());
+        assertEquals(3, domain.getSize());
+        assertFalse(domain.isArchived());
+    }
+
+}