test: add integration test

Author: darrachequesne

pom.xml

@@ -131,6 +131,24 @@
 			<scope>test</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-test</artifactId>

src/test/java/org/springframework/data/jpa/datatables/TestApplication.java

@@ -0,0 +1,7 @@
+package org.springframework.data.jpa.datatables;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class TestApplication {
+}

src/test/java/org/springframework/data/jpa/datatables/repository/EmployeeController.java

@@ -0,0 +1,25 @@
+package org.springframework.data.jpa.datatables.repository;
+
+import jakarta.validation.Valid;
+import org.springframework.data.jpa.datatables.mapping.DataTablesInput;
+import org.springframework.data.jpa.datatables.mapping.DataTablesOutput;
+import org.springframework.data.jpa.datatables.model.Employee;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@Validated
+class EmployeeController {
+    private final EmployeeRepository employeeRepository;
+
+    public EmployeeController(EmployeeRepository employeeRepository) {
+        this.employeeRepository = employeeRepository;
+    }
+
+    @RequestMapping(value = "/employees", method = RequestMethod.GET)
+    public DataTablesOutput<Employee> findEmployees(@Valid DataTablesInput input) {
+        return employeeRepository.findAll(input);
+    }
+}

src/test/java/org/springframework/data/jpa/datatables/repository/EmployeeControllerTest.java

@@ -0,0 +1,96 @@
+package org.springframework.data.jpa.datatables.repository;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.jpa.datatables.TestApplication;
+import org.springframework.data.jpa.datatables.model.Employee;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.util.MultiValueMap;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest(
+    webEnvironment = SpringBootTest.WebEnvironment.MOCK,
+    classes = TestApplication.class)
+@AutoConfigureMockMvc
+class EmployeeControllerTest {
+
+  @Autowired private EmployeeRepository employeeRepository;
+
+  @BeforeEach
+  public void init() {
+    this.employeeRepository.saveAll(Employee.ALL);
+  }
+
+  private static Map<String, String> createQuery() {
+    var query = new HashMap<String, String>();
+
+    query.put("draw", "1");
+    query.put("start", "0");
+    query.put("length", "10");
+
+    query.put("search.value", "");
+    query.put("search.regex", "false");
+
+    query.put("order[0].column", "0");
+    query.put("order[0].dir", "asc");
+
+    query.put("columns[0].data", "id");
+    query.put("columns[0].searchable", "true");
+    query.put("columns[0].orderable", "true");
+    query.put("columns[0].search.value", "");
+    query.put("columns[0].search.regex", "false");
+
+    return query;
+  }
+
+  @Test
+  void basic(@Autowired MockMvc mvc) throws Exception {
+    var query = createQuery();
+
+    mvc.perform(get("/employees").queryParams(MultiValueMap.fromSingleValue(query)))
+        .andExpect(status().isOk())
+        .andExpect(jsonPath("draw").value(1))
+        .andExpect(jsonPath("recordsTotal").value(6))
+        .andExpect(jsonPath("recordsFiltered").value(6))
+        .andExpect(jsonPath("data[0].firstName").value("Brenden"))
+        .andExpect(jsonPath("error").isEmpty());
+  }
+
+  @Test
+  void page(@Autowired MockMvc mvc) throws Exception {
+    var query = createQuery();
+
+    query.put("draw", "2");
+    query.put("start", "1");
+    query.put("length", "1");
+
+    mvc.perform(get("/employees").queryParams(MultiValueMap.fromSingleValue(query)))
+        .andExpect(status().isOk())
+        .andExpect(jsonPath("draw").value(2))
+        .andExpect(jsonPath("recordsTotal").value(6))
+        .andExpect(jsonPath("recordsFiltered").value(6))
+        .andExpect(jsonPath("data[0].firstName").value("Ashton"))
+        .andExpect(jsonPath("error").isEmpty());
+  }
+
+  @Test
+  void invalidStart(@Autowired MockMvc mvc) throws Exception {
+    var query = createQuery();
+
+    query.put("start", "-1");
+
+    mvc.perform(get("/employees").queryParams(MultiValueMap.fromSingleValue(query)))
+        .andExpect(status().is4xxClientError());
+  }
+}