BAEL-5771 Add code for url query manipulation in Java (#13820)

core-java-modules/core-java-networking-4/src/test/java/com/baeldung/urlquerymanipulation/UrlQueryManipulationUnitTest.java

@@ -0,0 +1,53 @@
+package com.baeldung.urlquerymanipulation;
+
+import static junit.framework.TestCase.assertEquals;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import javax.ws.rs.core.UriBuilder;
+
+import org.apache.http.client.utils.URIBuilder;
+
+import org.junit.Test;
+import org.springframework.web.util.UriComponentsBuilder;
+
+public class UrlQueryManipulationUnitTest {
+
+    @Test
+    public void whenUsingApacheUriBuilder_thenParametersAreCorrectlyAdded() throws URISyntaxException {
+        String url = "baeldung.com";
+        String key = "article";
+        String value = "alpha";
+        URI uri = new URIBuilder(url).addParameter(key, value)
+          .build();
+
+        assertEquals("baeldung.com?article=alpha", uri.toString());
+    }
+
+    @Test
+    public void whenUsingJavaUriBuilder_thenParametersAreCorrectlyAdded() {
+        String url = "baeldung.com";
+        String key = "article";
+        String value = "beta";
+        URI uri = UriBuilder.fromUri(url)
+          .queryParam(key, value)
+          .build();
+
+        assertEquals("baeldung.com?article=beta", uri.toString());
+    }
+
+    @Test
+    public void whenUsingSpringUriComponentsBuilder_thenParametersAreCorrectlyAdded() {
+        String url = "baeldung.com";
+        String key = "article";
+        String value = "charlie";
+        URI uri = UriComponentsBuilder.fromUriString(url)
+          .queryParam(key, value)
+          .build()
+          .toUri();
+
+        assertEquals("baeldung.com?article=charlie", uri.toString());
+    }
+
+}