Add first test

Grzegorz Piwowarek · Grzegorz Piwowarek · commit eff343b59679 · 2016-07-30T10:50:47.000+02:00
diff --git a/immutables/src/main/java/com/baeldung/immutable/Address.java b/immutables/src/main/java/com/baeldung/immutable/Address.java
@@ -1,5 +1,9 @@
 package com.baeldung.immutable;
 
-public class Address {
+import org.immutables.value.Value;
 
+@Value.Immutable
+public interface Address {
+    String getStreetName();
+    Integer getNumber();
 }
diff --git a/immutables/src/main/java/com/baeldung/immutable/Person.java b/immutables/src/main/java/com/baeldung/immutable/Person.java
@@ -3,6 +3,7 @@
 import org.immutables.value.Value;
 
 @Value.Immutable
-public class Person {
-    private String name;
+public abstract class Person {
+    abstract String getName();
+    abstract Integer getAge();
 }
diff --git a/immutables/src/test/java/com/baeldung/immutable/ImmutablePersonTest.java b/immutables/src/test/java/com/baeldung/immutable/ImmutablePersonTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.immutable;
+
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ImmutablePersonTest {
+
+    @Test
+    public void whenModifying_shouldCreateNewInstance() throws Exception {
+        final com.baeldung.immutable.ImmutablePerson john = com.baeldung.immutable.ImmutablePerson.builder()
+          .age(42)
+          .name("John")
+          .build();
+
+        final com.baeldung.immutable.ImmutablePerson john43 = john.withAge(43);
+
+        assertThat(john)
+          .isNotSameAs(john43);
+        assertThat(john.getAge())
+          .isEqualTo(42);
+    }
+}

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,9 @@`
`1`	`1`	`package com.baeldung.immutable;`
`2`	`2`
`3`		`-public class Address {`
	`3`	`+import org.immutables.value.Value;`
`4`	`4`
	`5`	`+@Value.Immutable`
	`6`	`+public interface Address {`
	`7`	`+ String getStreetName();`
	`8`	`+ Integer getNumber();`
`5`	`9`	`}`
Original file line number	Diff line number	Diff line change
`@@ -3,6 +3,7 @@`
`3`	`3`	`import org.immutables.value.Value;`
`4`	`4`
`5`	`5`	`@Value.Immutable`
`6`		`-public class Person {`
`7`		`- private String name;`
	`6`	`+public abstract class Person {`
	`7`	`+ abstract String getName();`
	`8`	`+ abstract Integer getAge();`
`8`	`9`	`}`