add producer side

spring-cloud-contract-producer/pom.xml

@@ -41,6 +41,16 @@
 			<artifactId>spring-cloud-starter-contract-verifier</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-autoconfigure</artifactId>
+			<version>2.2.4.RELEASE</version>
+		</dependency>
+
 	</dependencies>
 
 	<dependencyManagement>
@@ -63,6 +73,7 @@
 				<version>2.2.1.RELEASE</version>
 				<extensions>true</extensions>
 				<configuration>
+					<baseClassForTests>dev.pater.springcloudcontractproducer.BaseTestClass</baseClassForTests>
 					<testFramework>JUNIT5</testFramework>
 				</configuration>
 			</plugin>

spring-cloud-contract-producer/src/main/java/dev/pater/springcloudcontractproducer/AccountNumberRestController.java

@@ -0,0 +1,70 @@
+package dev.pater.springcloudcontractproducer;
+
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/accountNumber")
+public class AccountNumberRestController {
+
+    @GetMapping
+    public ResponseEntity<AccountNumber> get() {
+
+        return ResponseEntity.ok().body(new AccountNumber(123L));
+    }
+
+    @PutMapping(produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity put(@RequestBody AccountNumber accountNumber) {
+
+        if (accountNumber.getAccountNumber() < 10)
+            return ResponseEntity.badRequest().body(new ErrorMessage("ACCOUNT_NUMBER_INVALID", "Account number too short"));
+
+        // logic
+
+        return ResponseEntity.ok().build();
+    }
+
+
+}
+
+
+class ErrorMessage {
+    private String errorCode;
+
+    private String message;
+
+    public String getErrorCode() {
+        return errorCode;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    ErrorMessage(String errorCode, String message) {
+        this.errorCode = errorCode;
+        this.message = message;
+    }
+
+
+}
+
+class AccountNumber {
+    AccountNumber(long accountNumber) {
+        this.accountNumber = accountNumber;
+    }
+
+    public long getAccountNumber() {
+        return accountNumber;
+    }
+
+    public AccountNumber() {
+    }
+
+    public void setAccountNumber(long accountNumber) {
+        this.accountNumber = accountNumber;
+    }
+
+    private long accountNumber;
+}

spring-cloud-contract-producer/src/test/java/dev/pater/springcloudcontractproducer/BaseTestClass.java

@@ -0,0 +1,21 @@
+package dev.pater.springcloudcontractproducer;
+
+import io.restassured.module.mockmvc.RestAssuredMockMvc;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+public abstract class BaseTestClass {
+
+    @InjectMocks
+    AccountNumberRestController accountNumberRestController;
+
+    @BeforeEach
+    public void setUp() {
+        RestAssuredMockMvc.standaloneSetup(this.accountNumberRestController);
+
+    }
+
+}

spring-cloud-contract-producer/src/test/resources/contracts/accountNumber/ErrorCheckAccountNumberContract.groovy

@@ -0,0 +1,37 @@
+package contracts.accountNumber
+
+import org.springframework.cloud.contract.spec.Contract;
+
+Contract.make {
+    description("""
+User want to update his account number and passes invalid number 
+```
+given:
+	any client and too short account number
+when:
+	he want to update his account number
+then:
+	we'll send him error message
+```
+""")
+    request {
+        method 'PUT'
+        url '/accountNumber'
+        body(
+                accountNumber: $(regex('[0-9]{1}'))
+        )
+        headers {
+            contentType(applicationJson())
+        }
+    }
+    response {
+        status BAD_REQUEST()
+        body([
+                errorCode: "ACCOUNT_NUMBER_INVALID",
+                message: anyNonEmptyString()
+        ])
+        headers {
+            contentType(applicationJson())
+        }
+    }
+}

spring-cloud-contract-producer/src/test/resources/contracts/accountNumber/GetAccountNumberContract.groovy

@@ -0,0 +1,33 @@
+package contracts.accountNumber
+
+import org.springframework.cloud.contract.spec.Contract;
+
+Contract.make {
+    description("""
+User asks for his account number
+```
+given:
+	any client
+when:
+	he asks for account number
+then:
+	we'll send him back his account number
+```
+""")
+    request {
+        method 'GET'
+        url '/accountNumber'
+        headers {
+            contentType(applicationJson())
+        }
+    }
+    response {
+        status 200
+        body(
+                accountNumber: anyNumber()
+        )
+        headers {
+            contentType(applicationJson())
+        }
+    }
+}