BAEL-5209 example with JUnit5, Hamcrest and AssertJ

testing-modules/testing-assertions/src/main/java/com/baeldung/object/type/Deciduous.java

@@ -0,0 +1,15 @@
+package com.baeldung.object.type;
+
+public class Deciduous implements Tree {
+
+    private String name;
+
+    public Deciduous(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public boolean isEvergreen() {
+        return false;
+    }
+}

testing-modules/testing-assertions/src/main/java/com/baeldung/object/type/Evergreen.java

@@ -0,0 +1,16 @@
+package com.baeldung.object.type;
+
+public class Evergreen implements Tree {
+
+    private String name;
+
+    public Evergreen(String name) {
+        this.name = name;
+    }
+
+
+    @Override
+    public boolean isEvergreen() {
+        return true;
+    }
+}

testing-modules/testing-assertions/src/main/java/com/baeldung/object/type/Tree.java

@@ -0,0 +1,6 @@
+package com.baeldung.object.type;
+
+public interface Tree {
+
+    public boolean isEvergreen();
+}

testing-modules/testing-assertions/src/main/java/com/baeldung/object/type/TreeSorter.java

@@ -0,0 +1,19 @@
+package com.baeldung.object.type;
+
+import java.util.List;
+
+public class TreeSorter {
+    protected Tree sortTree(String name) {
+
+        final List<String> deciduous = List.of("Beech", "Birch", "Ash", "Whitebeam", "Hornbeam", "Hazel & Willow");
+        final List<String> evergreen = List.of("Cedar", "Holly", "Laurel", "Olive", "Pine");
+
+        if (deciduous.contains(name)) {
+            return new Deciduous(name);
+        } else if (evergreen.contains(name)) {
+            return new Evergreen(name);
+        } else {
+            throw new RuntimeException("Tree could not be classified");
+        }
+    }
+}