add FieldVerifier to validate on both sides

Author: lofidewanto

intro-gwtboot-springboot-shared/pom.xml

@@ -24,6 +24,13 @@
 			<version>1.0.0-RC5</version>
 			<scope>provided</scope>
 		</dependency>
+		
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<version>5.8.1</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<build>

intro-gwtboot-springboot-shared/src/main/java/com/company/crm/shared/FieldVerifier.java

@@ -0,0 +1,11 @@
+package com.company.crm.shared;
+
+public class FieldVerifier {
+
+    public static boolean isValidName(String name) {
+        if (name == null) {
+            return false;
+        }
+        return name.length() > 3;
+    }
+}

intro-gwtboot-springboot-shared/src/test/java/com/company/crm/shared/FieldVerifierTest.java

@@ -0,0 +1,23 @@
+package com.company.crm.shared;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class FieldVerifierTest {
+
+	@Test
+	void name_less_than_3_chars_not_valid() {
+		boolean validName = FieldVerifier.isValidName("Lof");
+
+		assertTrue(!validName);
+	}
+
+	@Test
+	void name_longer_than_3_chars_valid() {
+		boolean validName = FieldVerifier.isValidName("Lofi");
+
+		assertTrue(validName);
+	}
+
+}