BAEL-3769 | Writing templates for test cases using JUnit 5

testing-modules/junit5-annotations/src/main/java/com/baeldung/junit5/templates/UserIdGenerator.java

@@ -0,0 +1,5 @@
+package com.baeldung.junit5.templates;
+
+public interface UserIdGenerator {
+    String generate(String firstName, String lastName);
+}

testing-modules/junit5-annotations/src/main/java/com/baeldung/junit5/templates/UserIdGeneratorImpl.java

@@ -0,0 +1,15 @@
+package com.baeldung.junit5.templates;
+
+public class UserIdGeneratorImpl implements UserIdGenerator {
+    private boolean isFeatureEnabled;
+
+    public UserIdGeneratorImpl(boolean isFeatureEnabled) {
+        this.isFeatureEnabled = isFeatureEnabled;
+    }
+
+    public String generate(String firstName, String lastName) {
+        String initialAndLastName = firstName.substring(0, 1)
+            .concat(lastName);
+        return isFeatureEnabled ? "bael".concat(initialAndLastName) : initialAndLastName;
+    }
+}