Initial commit for BAEL-1516

testing-modules/testing/src/main/java/com/baeldung/testing/assertj/Member.java

@@ -0,0 +1,19 @@
+package com.baeldung.testing.assertj;
+
+public class Member {
+    private String name;
+    private int age;
+
+    public Member(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}

testing-modules/testing/src/test/java/com/baeldung/testing/assertj/AssertJConditionUnitTest.java

@@ -0,0 +1,72 @@
+package com.baeldung.testing.assertj;
+
+import static org.assertj.core.api.Assertions.allOf;
+import static org.assertj.core.api.Assertions.anyOf;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.not;
+import static org.junit.Assert.fail;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.assertj.core.api.Condition;
+import org.junit.Test;
+
+public class AssertJConditionUnitTest {
+    private Condition<Member> senior = new Condition<>(m -> m.getAge() >= 60, "senior");
+    private Condition<Member> nameJohn = new Condition<>(m -> m.getName().equalsIgnoreCase("John"), "name John");
+
+    @Test
+    public void whenUsingMemberAgeCondition_thenCorrect() {
+        Member member = new Member("John", 65);
+        assertThat(member).is(senior);
+
+        try {
+            assertThat(member).isNot(senior);
+            fail();
+        } catch (AssertionError e) {
+            assertThat(e).hasMessageContaining("not to be <senior>");
+        }
+    }
+
+    @Test
+    public void whenUsingMemberNameCondition_thenCorrect() {
+        Member member = new Member("Jane", 60);
+        assertThat(member).doesNotHave(nameJohn);
+
+        try {
+            assertThat(member).has(nameJohn);
+            fail();
+        } catch (AssertionError e) {
+            assertThat(e).hasMessageContaining("to have:\n <name John>");
+        }
+    }
+
+    @Test
+    public void whenCollectionConditionsAreSatisfied_thenCorrect() {
+        List<Member> members = new ArrayList<>();
+        members.add(new Member("Alice", 50));
+        members.add(new Member("Bob", 60));
+
+        assertThat(members).haveExactly(1, senior);
+        assertThat(members).doNotHave(nameJohn);
+    }
+
+    @Test
+    public void whenCombiningAllOfConditions_thenCorrect() {
+        Member john = new Member("John", 60);
+        Member jane = new Member("Jane", 50);
+
+        assertThat(john).is(allOf(senior, nameJohn));
+        assertThat(jane).is(allOf(not(nameJohn), not(senior)));
+    }
+
+    @Test
+    public void whenCombiningAnyOfConditions_thenCorrect() {
+        Member john = new Member("John", 50);
+        Member jane = new Member("Jane", 60);
+
+        assertThat(john).is(anyOf(senior, nameJohn));
+        assertThat(jane).is(anyOf(nameJohn, senior));
+    }
+}