Asciidoctor "Snippets" is missing in Maven - spring-boot

Question

When I run the test case then requests and responses of adoc type will be created and displayed in JSON format under the generated-snippets directory. when I run this mvn command mvn clean package to create jar and HTML type of index under the generated-docs then following warning has occurred
when I open the index.html via browser then Unresolved directive in index.adoc is displayed instead of JSON result as a response.
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-boot-starter</artifactId>
<version>3.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.oracle/ojdbc6 -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.4</version>
</dependency>
<dependency>
<groupId>org.springframework.restdocs</groupId>
<artifactId>spring-restdocs-asciidoctor</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.restdocs</groupId>
<artifactId>spring-restdocs-mockmvc</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<finalName>config-demo</finalName>
</configuration>
</plugin>
<plugin>
<groupId>org.asciidoctor</groupId>
<artifactId>asciidoctor-maven-plugin</artifactId>
<version>1.5.6</version>
<executions>
<execution>
<id>generate-docs</id>
<phase>package</phase>
<goals>
<goal>process-asciidoc</goal>
</goals>
<configuration>
<backend>html</backend>
<doctype>product</doctype>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
index.adoc
= Nafaz Benzema Getting Started With Spring REST Docs
This is an example output for a service running at http://localhost:9090:
==GET API Example
.request
include::{snippets}/getAllProduct/http-request.adoc[]
.response
include::{snippets}/getAllProduct/http-response.adoc[]
As you can see the format is very simple, and in fact you always get the same message.
Controller Test class
#ExtendWith({RestDocumentationExtension.class, SpringExtension.class})
#WebMvcTest
#AutoConfigureRestDocs(outputDir = "/target/generated-snippets")
public class ProductControllerTest {
#Autowired
private WebApplicationContext webApplicationContext;
#MockBean
private ProductService productService;
private MockMvc mockMvc;
List<Product> products =null;
#BeforeEach
public void setUp(WebApplicationContext webApplicationContext, RestDocumentationContextProvider documentationContextProvider) {
this.mockMvc = MockMvcBuilders
.webAppContextSetup(webApplicationContext)
.apply(MockMvcRestDocumentation.documentationConfiguration(documentationContextProvider))
.build();
products=getProducts();
}
#Test
public void getAllProduct() throws Exception {
String expectedProduct=new ObjectMapper().writeValueAsString(products);
Mockito.when(productService.getAllProduct()).thenReturn(products);
MvcResult result= mockMvc.perform(get("/products")
.contentType(MediaType.APPLICATION_JSON_VALUE))
.andExpect(status().isOk())
.andExpect(content().json(expectedProduct))
.andDo(document("{methodName}",preprocessRequest(prettyPrint()),
preprocessResponse(prettyPrint())))
.andReturn();
String actualProduct=result.getResponse().getContentAsString();
Assertions.assertEquals(expectedProduct,actualProduct);
}
private List<Product> getProducts()
{
Product product_1=new Product();
product_1.setProductId(1001);
product_1.setProductName("Penguin-ears");
product_1.setNumberOfUnitInCartoon(20);
product_1.setPriceOfCartoon(175.00);
product_1.setUrlOfImage("https://i.ibb.co/pLdM7FL/shutterstock-306427430-scaled.jpg");
Product product_2=new Product();
product_2.setProductId(1002);
product_2.setProductName("Horseshoe");
product_2.setNumberOfUnitInCartoon(5);
product_2.setPriceOfCartoon(825);
product_2.setUrlOfImage("https://i.ibb.co/MRDwnqj/horseshoe.jpg");
return new ArrayList<>(Arrays.asList(product_1,product_2));
}
}

Answer 1

The solution has been found. We have to add spring-restdocs-asciidoctor dependency inside the plugin which it belongs.
Remove spring-restdocs-asciidoctor dependency from the global dependency management space and add it inside the plugin
<plugin>
<groupId>org.asciidoctor</groupId>
<artifactId>asciidoctor-maven-plugin</artifactId>
<version>1.5.6</version>
<executions>
<execution>
<id>generate-docs</id>
<phase>package</phase>
<goals>
<goal>process-asciidoc</goal>
</goals>
<configuration>
<backend>html</backend>
<doctype>product</doctype>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.springframework.restdocs</groupId>
<artifactId>spring-restdocs-asciidoctor</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
</dependencies>
</plugin>