Merge branch 'master' into BAEL-4783-cucumber-tags-junit5

testing-modules/README.md

@@ -1,3 +0,0 @@
-## Testing Modules
-
-This is an aggregator module containing multiple modules focused on testing libraries.

testing-modules/junit-4/README.md

@@ -5,3 +5,4 @@
 - [Introduction to JUnitParams](http://www.baeldung.com/junit-params)
 - [Running JUnit Tests Programmatically, from a Java Application](https://www.baeldung.com/junit-tests-run-programmatically-from-java)
 - [Introduction to Lambda Behave](https://www.baeldung.com/lambda-behave)
+- [Conditionally Run or Ignore Tests in JUnit 4](https://www.baeldung.com/junit-conditional-assume)

testing-modules/junit-4/src/test/java/com/baeldung/assume/ConditionallyIgnoreTestsUnitTest.java

@@ -5,37 +5,59 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assume.assumeFalse;
 import static org.junit.Assume.assumeThat;
 import static org.junit.Assume.assumeTrue;
+import static org.junit.Assume.assumeNotNull;
+import static org.junit.Assume.assumeNoException;
+
 
 import org.junit.Test;
 
 public class ConditionallyIgnoreTestsUnitTest {
 
-
     @Test
-    public void whenAssumeThatCodeVersionIsNot2_thenIgnore() {
-        final int codeVersion = 1;
-        assumeThat(codeVersion, is(2));
-
-        assertEquals("hello", "HELLO".toLowerCase());
+    public void whenAssumeThatAndOSIsLinux_thenRunTest() {
+        assumeThat(getOsName(), is("Linux"));
+        assertEquals("run", "RUN".toLowerCase());
     }
 
     @Test
-    public void whenAssumeTrueOnCondition_thenIgnore() {
-        final int codeVersion = 1;
-        assumeTrue(isCodeVersion2(codeVersion));
-
-        assertEquals("hello", "HELLO".toLowerCase());
+    public void whenAssumeTrueAndOSIsLinux_thenRunTest() {
+        assumeTrue(isExpectedOS(getOsName()));
+        assertEquals("run", "RUN".toLowerCase());
     }
 
     @Test
-    public void whenAssumeFalseOnCondition_thenIgnore() {
-        final int codeVersion = 2;
-        assumeFalse(isCodeVersion2(codeVersion));
-
-        assertEquals("hello", "HELLO".toLowerCase());
+    public void whenAssumeFalseAndOSIsLinux_thenIgnore() {
+        assumeFalse(isExpectedOS(getOsName()));
+        assertEquals("run", "RUN".toLowerCase());
     }
 
-    private boolean isCodeVersion2(final int codeVersion) {
-        return codeVersion == 2;
+    @Test
+    public void whenAssumeNotNullAndNotNullOSVersion_thenRun() {
+        assumeNotNull(getOsName());
+        assertEquals("run", "RUN".toLowerCase());
     }
-}
+
+    /**
+     * Let's use a different example here.
+     */
+    @Test
+    public void whenAssumeNoExceptionAndExceptionThrown_thenIgnore() {
+        assertEquals("everything ok", "EVERYTHING OK".toLowerCase());
+        String t = null;
+        try {
+          t.charAt(0);
+        } catch (NullPointerException npe) {
+          assumeNoException(npe);
+        }
+        assertEquals("run", "RUN".toLowerCase());
+    }
+
+    private boolean isExpectedOS(final String osName) {
+        return "Linux".equals(osName);
+    }
+
+    // This should use System.getProperty("os.name") in a real test.
+    private String getOsName() {
+        return "Linux";
+    }
+}

testing-modules/junit-5-advanced/pom.xml

@@ -35,18 +35,8 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-            </plugin>
-        </plugins>
-    </build>
-
     <properties>
         <junit-jupiter.version>5.4.2</junit-jupiter.version>
-        <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
         <junit.vintage.version>5.4.2</junit.vintage.version>
     </properties>
 

testing-modules/junit-5-advanced/src/test/java/com/baeldung/extensions/testwatcher/TestResultLoggerExtension.java

@@ -46,7 +46,7 @@ public class TestResultLoggerExtension implements TestWatcher, AfterAllCallback
 
     @Override
     public void testFailed(ExtensionContext context, Throwable cause) {
-        LOG.info("Test Aborted for test {}: ", context.getDisplayName());
+        LOG.info("Test Failed for test {}: ", context.getDisplayName());
 
         testResultsStatus.add(TestResultStatus.FAILED);
     }

testing-modules/junit-5-basics/pom.xml

@@ -152,7 +152,6 @@
         <junit-platform.version>1.2.0</junit-platform.version>
         <junit-jupiter.version>5.4.2</junit-jupiter.version>
         <spring.version>5.0.6.RELEASE</spring.version>
-        <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
     </properties>
 
 </project>

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit4/BeforeAndAfterAnnotationsUnitTest.java

@@ -28,8 +28,8 @@ public class BeforeAndAfterAnnotationsUnitTest {
     }
 
     @After
-    public void finalize() {
-        LOG.info("finalize");
+    public void teardown() {
+        LOG.info("teardown");
         list.clear();
     }
 

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/BeforeEachAndAfterEachAnnotationsUnitTest.java

@@ -28,8 +28,8 @@ public class BeforeEachAndAfterEachAnnotationsUnitTest {
     }
 
     @AfterEach
-    public void finalize() {
-        LOG.info("finalize");
+    public void teardown() {
+        LOG.info("teardown");
         list.clear();
     }
 

testing-modules/junit-5/README.md

@@ -7,3 +7,4 @@
 - [Testing an Abstract Class With JUnit](https://www.baeldung.com/junit-test-abstract-class)
 - [Guide to Dynamic Tests in JUnit 5](https://www.baeldung.com/junit5-dynamic-tests)
 - [Determine the Execution Time of JUnit Tests](https://www.baeldung.com/junit-test-execution-time)
+- [@BeforeAll and @AfterAll in Non-Static Methods](https://www.baeldung.com/java-beforeall-afterall-non-static)

testing-modules/junit-5/pom.xml

@@ -105,10 +105,6 @@
             </resource>
         </resources>
         <plugins>
-            <plugin>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
@@ -140,7 +136,6 @@
         <log4j2.version>2.8.2</log4j2.version>
         <powermock.version>2.0.0</powermock.version>
         <maven-surefire-plugin.version>2.22.0</maven-surefire-plugin.version>
-        <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
         <spring.version>5.0.1.RELEASE</spring.version>
         <surefire.report.plugin>3.0.0-M3</surefire.report.plugin>
     </properties>

testing-modules/junit-5/src/test/java/com/baeldung/junit5/nonstatic/BeforeAndAfterAnnotationsUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.junit5.nonstatic;
+
+import org.junit.jupiter.api.*;
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+public class BeforeAndAfterAnnotationsUnitTest {
+
+    String input;
+    Long result;
+
+    @BeforeAll
+    public void setup() {
+        input = "77";
+    }
+
+    @AfterAll
+    public void teardown() {
+        input = null;
+        result = null;
+    }
+
+    @Test
+    public void whenConvertStringToLong_thenResultShouldBeLong() {
+        result = Long.valueOf(input);
+        Assertions.assertEquals(77l, result);
+    }
+}

testing-modules/junit5-annotations/pom.xml

@@ -55,8 +55,8 @@
     </dependencies>
 
     <properties>
-        <junit.jupiter.version>5.6.2</junit.jupiter.version>
-        <junit.platform.version>1.6.0</junit.platform.version>
+        <junit.jupiter.version>5.7.0</junit.jupiter.version>
+        <junit.platform.version>1.7.0</junit.platform.version>
         <log4j2.version>2.8.2</log4j2.version>
         <assertj-core.version>3.11.1</assertj-core.version>
     </properties>

testing-modules/junit5-migration/pom.xml

@@ -18,12 +18,12 @@
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-engine</artifactId>
-            <version>${junit.platform.version}</version>
+            <version>${junit-platform.version}</version>
         </dependency>
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-runner</artifactId>
-            <version>${junit.platform.version}</version>
+            <version>${junit-platform.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -47,42 +47,13 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
-        <plugins>
-            <plugin>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <dependencies>
-                    <dependency>
-                        <groupId>org.junit.platform</groupId>
-                        <artifactId>junit-platform-surefire-provider</artifactId>
-                        <version>${junit.platform.version}</version>
-                    </dependency>
-                </dependencies>
-            </plugin>
-            <plugin>
-                <groupId>org.codehaus.mojo</groupId>
-                <artifactId>exec-maven-plugin</artifactId>
-                <version>${exec-maven-plugin.version}</version>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>java</goal>
-                        </goals>
-                    </execution>
-                </executions>
-                <configuration>
-                    <mainClass>com.baeldung.TestLauncher</mainClass>
-                </configuration>
-            </plugin>
-        </plugins>
     </build>
 
     <properties>
         <junit.jupiter.version>5.2.0</junit.jupiter.version>
-        <junit.platform.version>1.2.0</junit.platform.version>
+        <junit-platform.version>1.2.0</junit-platform.version>
         <junit.vintage.version>5.2.0</junit.vintage.version>
         <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
-        <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
     </properties>
 
 </project>

testing-modules/load-testing-comparison/pom.xml

@@ -37,7 +37,6 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -55,11 +54,6 @@
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <scope>compile</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -77,7 +71,6 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
-                <version>2.0.5.RELEASE</version>
             </plugin>
             <!--<plugin>-->
             <!--<groupId>net.alchim31.maven</groupId>-->
@@ -122,10 +115,10 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <encoding>UTF-8</encoding>
-        <scala.version>2.11.12</scala.version> <!--2.11.12 --> <!--2.12.6 -->
-        <gatling.version>2.2.5</gatling.version> <!--2.2.5 --> <!--2.3.1 -->
-        <scala-maven-plugin.version>3.2.2</scala-maven-plugin.version> <!--3.2.2 --> <!--3.3.2 -->
-        <gatling-maven-plugin.version>2.2.1</gatling-maven-plugin.version> <!--2.2.1 --> <!--2.2.4 -->
+        <scala.version>2.12.12</scala.version> <!--2.11.12 --> <!--2.12.6 -->
+        <gatling.version>3.4.0</gatling.version> <!--2.2.5 --> <!--2.3.1 -->
+        <scala-maven-plugin.version>4.4.0</scala-maven-plugin.version> <!--3.2.2 --> <!--3.3.2 -->
+        <gatling-maven-plugin.version>3.1.0</gatling-maven-plugin.version> <!--2.2.1 --> <!--2.2.4 -->
         <jmeter.version>5.0</jmeter.version>
     </properties>
 

testing-modules/load-testing-comparison/src/main/java/com/baeldung/loadtesting/TransactionController.java

@@ -1,26 +0,0 @@
-package com.baeldung.loadtesting;
-
-import com.baeldung.loadtesting.model.Transaction;
-import com.baeldung.loadtesting.repository.TransactionRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.*;
-
-@RestController
-@Deprecated
-public class TransactionController {
-
-    @Autowired
-    private TransactionRepository transactionRepository;
-
-    @PostMapping(path="/addTransaction")
-    public @ResponseBody
-    String saveTransactions(@RequestBody Transaction trnsctn){
-        transactionRepository.save(trnsctn);
-        return "Saved Transaction.";
-    }
-
-    @GetMapping(path="/findAll/{rewardId}")
-    public @ResponseBody Iterable<Transaction> getTransactions(@RequestParam Integer id){
-        return transactionRepository.findByCustomerRewardsId(id);
-    }
-}

testing-modules/load-testing-comparison/src/main/java/com/baeldung/loadtesting/model/CustomerRewardsAccount.java

@@ -4,11 +4,11 @@ import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
-
-import lombok.Data;
+import javax.persistence.Index;
+import javax.persistence.Table;
 
 @Entity
-@Data
+@Table(indexes = {@Index(columnList="customerId")})
 public class CustomerRewardsAccount {
 
     @Id
@@ -19,4 +19,18 @@ public class CustomerRewardsAccount {
     public Integer getCustomerId(){
         return this.customerId;
     }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public void setCustomerId(Integer customerId) {
+        this.customerId = customerId;
+    }
+    
+    
 }

testing-modules/load-testing-comparison/src/main/java/com/baeldung/loadtesting/model/Transaction.java

@@ -1,16 +1,17 @@
 package com.baeldung.loadtesting.model;
 
-import lombok.Data;
-
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
+import javax.persistence.Index;
+import javax.persistence.Table;
+
 import java.util.Date;
 import java.util.Calendar;
 
 @Entity
-@Data
+@Table(indexes = {@Index(columnList="customerRewardsId")})
 public class Transaction {
 
     @Id
@@ -27,4 +28,34 @@ public class Transaction {
     public void setTransactionDate(Date transactionDate){
         this.transactionDate = transactionDate;
     }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getCustomerRewardsId() {
+        return customerRewardsId;
+    }
+
+    public void setCustomerRewardsId(Integer customerRewardsId) {
+        this.customerRewardsId = customerRewardsId;
+    }
+
+    public Integer getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(Integer customerId) {
+        this.customerId = customerId;
+    }
+
+    public Date getTransactionDate() {
+        return transactionDate;
+    }
+    
+    
 }

testing-modules/load-testing-comparison/src/main/resources/application.properties

@@ -0,0 +1,7 @@
+spring.h2.console.enabled=true
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+

testing-modules/load-testing-comparison/src/main/resources/scripts/Gatling/GatlingScenario.scala

@@ -7,46 +7,41 @@ import scala.concurrent.duration._
 
 class RewardsScenario extends Simulation {
 
-  def randCustId() = Random.nextInt(99)
+  def randCustId() = java.util.concurrent.ThreadLocalRandom.current().nextInt()
   
   val httpProtocol = http.baseUrl("http://localhost:8080")
-					    .acceptHeader("text/html,application/json;q=0.9,*/*;q=0.8")
-						.doNotTrackHeader("1")
-						.acceptLanguageHeader("en-US,en;q=0.5")
-						.acceptEncodingHeader("gzip, deflate")
-						.userAgentHeader("Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0")
   
   val scn = scenario("RewardsScenario")
-	.repeat(10){
+	.repeat(1000){
+
 		exec(http("transactions_add")
 		  .post("/transactions/add/")
-		  .body(StringBody("""{ "customerRewardsId":null,"customerId":""""+ randCustId() + """","transactionDate":null }""")).asJson
+		  .body(StringBody(_ => s"""{"customerRewardsId":null,"customerId":${randCustId()},"transactionDate":null}""")).asJson
 		.check(jsonPath("$.id").saveAs("txnId"))
 		.check(jsonPath("$.transactionDate").saveAs("txtDate"))
 		.check(jsonPath("$.customerId").saveAs("custId")))
-		.pause(1)
 		
 		.exec(http("get_reward")
 		  .get("/rewards/find/${custId}")
-		  .check(jsonPath("$.id").saveAs("rwdId")))
-		.pause(1)
+		  .check(jsonPath("$.id").optional.saveAs("rwdId")))
 		
 		.doIf("${rwdId.isUndefined()}"){
 			exec(http("rewards_add")
 			  .post("/rewards/add")
-			  .body(StringBody("""{ "customerId": "${custId}" }""")).asJson
+			  .body(StringBody("""{"customerId":${custId}}""")).asJson
 			.check(jsonPath("$.id").saveAs("rwdId")))
 		}
 		
-		.exec(http("transactions_add")
+		.exec(http("transactions_update")
 		  .post("/transactions/add/")
-		  .body(StringBody("""{ "customerRewardsId":"${rwdId}","customerId":"${custId}","transactionDate":"${txtDate}" }""")).asJson)
-		.pause(1)
+		  .body(StringBody("""{"customerRewardsId":${rwdId},"customerId":${custId},"transactionDate":"${txtDate}" }""")).asJson)
 		
-		.exec(http("get_reward")
+		.exec(http("get_transactions")
 		  .get("/transactions/findAll/${rwdId}"))
+
+		.exec(_.removeAll("txnId", "txtDate", "custId", "rwdId"))
 	}
   setUp(
     scn.inject(atOnceUsers(100))
   ).protocols(httpProtocol)
-}
+}

testing-modules/load-testing-comparison/src/main/resources/scripts/JMeter/Test Plan.jmx

@@ -16,7 +16,7 @@
         <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
         <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller" enabled="true">
           <boolProp name="LoopController.continue_forever">false</boolProp>
-          <stringProp name="LoopController.loops">10</stringProp>
+          <stringProp name="LoopController.loops">1000</stringProp>
         </elementProp>
         <stringProp name="ThreadGroup.num_threads">100</stringProp>
         <stringProp name="ThreadGroup.ramp_time">0</stringProp>
@@ -200,7 +200,7 @@
         </HTTPSamplerProxy>
         <hashTree/>
         <RandomVariableConfig guiclass="TestBeanGUI" testclass="RandomVariableConfig" testname="Random Variable" enabled="true">
-          <stringProp name="maximumValue">10000</stringProp>
+          <stringProp name="maximumValue">9223372036854775806</stringProp>
           <stringProp name="minimumValue">1</stringProp>
           <stringProp name="outputFormat"></stringProp>
           <boolProp name="perThread">false</boolProp>

testing-modules/load-testing-comparison/src/main/resources/scripts/The Grinder/grinder.properties

@@ -1,5 +1,5 @@
 grinder.script = grinder.py
 grinder.threads = 100
 grinder.processes = 1
-grinder.runs = 10
+grinder.runs = 1000
 grinder.logDirectory = /logs

testing-modules/load-testing-comparison/src/main/resources/scripts/The Grinder/grinder.py

@@ -24,6 +24,7 @@ random=java.util.Random()
 
 class TestRunner:
     def __call__(self):
+
         customerId = str(random.nextInt());
 
         result = request1.POST("http://localhost:8080/transactions/add", "{"'"customerRewardsId"'":null,"'"customerId"'":"+ customerId + ","'"transactionDate"'":null}")
@@ -37,4 +38,5 @@ class TestRunner:
           rwdId = parseJsonString(result.getText(), "id")
 
         result = request1.POST("http://localhost:8080/transactions/add", "{"'"id"'":" + txnId + ","'"customerRewardsId"'":" + rwdId + ","'"customerId"'":"+ customerId + ","'"transactionDate"'":null}")
-        result = request1.GET("http://localhost:8080/transactions/findAll/" + rwdId)
+        result = request1.GET("http://localhost:8080/transactions/findAll/" + rwdId)
+

testing-modules/mockito-2/README.md

@@ -5,4 +5,8 @@
 - [Mockito Strict Stubbing and The UnnecessaryStubbingException](https://www.baeldung.com/mockito-unnecessary-stubbing-exception)
 - [Mockito and Fluent APIs](https://www.baeldung.com/mockito-fluent-apis)
 - [Mocking the ObjectMapper readValue() Method](https://www.baeldung.com/mockito-mock-jackson-read-value)
-- [Introduction to Mockito’s AdditionalAnswers](https://www.baeldung.com/mockito-additionalanswers)
+- [Introduction to Mockito’s AdditionalAnswers](https://www.baeldung.com/mockito-additionalanswers)
+- [Mockito – Using Spies](https://www.baeldung.com/mockito-spy)
+- [Using Mockito ArgumentCaptor](https://www.baeldung.com/mockito-argumentcaptor)
+- [Difference Between when() and doXxx() Methods in Mockito](https://www.baeldung.com/java-mockito-when-vs-do)
+- [Overview of Mockito MockSettings](https://www.baeldung.com/mockito-mocksettings)

testing-modules/mockito-2/pom.xml

@@ -30,7 +30,6 @@
 
     <properties>
         <mockito.version>2.21.0</mockito.version>
-        <jackson.version>2.10.3</jackson.version>
     </properties>
 
 </project>

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/AuthenticationStatus.java

@@ -0,0 +1,7 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public enum AuthenticationStatus {
+    AUTHENTICATED,
+    NOT_AUTHENTICATED,
+    ERROR
+}

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/Credentials.java

@@ -0,0 +1,14 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public class Credentials {
+    private final String name;
+    private final String password;
+    private final String key;
+
+    public Credentials(String name, String password, String key) {
+        this.name = name;
+        this.password = password;
+        this.key = key;
+    }
+}
+

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/DeliveryPlatform.java

@@ -0,0 +1,10 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public interface DeliveryPlatform {
+
+    void deliver(Email email);
+
+    String getServiceStatus();
+
+    AuthenticationStatus authenticate(Credentials credentials);
+}

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/Email.java

@@ -0,0 +1,47 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public class Email {
+
+    private String address;
+    private String subject;
+    private String body;
+    private Format format;
+
+    public Email(String address, String subject, String body) {
+        this.address = address;
+        this.subject = subject;
+        this.body = body;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getSubject() {
+        return subject;
+    }
+
+    public void setSubject(String subject) {
+        this.subject = subject;
+    }
+
+    public String getBody() {
+        return body;
+    }
+
+    public void setBody(String body) {
+        this.body = body;
+    }
+
+    public Format getFormat() {
+        return format;
+    }
+
+    public void setFormat(Format format) {
+        this.format = format;
+    }
+}

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/EmailService.java

@@ -0,0 +1,36 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public class EmailService {
+
+    private DeliveryPlatform platform;
+
+    public EmailService(DeliveryPlatform platform) {
+        this.platform = platform;
+    }
+
+    public void send(String to, String subject, String body, boolean html) {
+        Format format = Format.TEXT_ONLY;
+        if (html) {
+            format = Format.HTML;
+        }
+        Email email = new Email(to, subject, body);
+        email.setFormat(format);
+        platform.deliver(email);
+    }
+
+    public ServiceStatus checkServiceStatus() {
+        if (platform.getServiceStatus().equals("OK")) {
+            return ServiceStatus.UP;
+        } else {
+            return ServiceStatus.DOWN;
+        }
+    }
+
+    public boolean authenticatedSuccessfully(Credentials credentials) {
+        if (platform.authenticate(credentials).equals(AuthenticationStatus.AUTHENTICATED)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}

testing-modules/mockito-2/src/main/java/com/baeldung/mockito/argumentcaptor/Format.java

@@ -0,0 +1,6 @@
+package com.baeldung.mockito.argumentcaptor;
+
+public enum Format {
+    TEXT_ONLY,
+    HTML
+}