Added postcode validator

src/main/java/com/postcode/io/initializers/Postcode.java

@@ -5,8 +5,11 @@ import java.net.URL;
 
 import org.codehaus.plexus.util.StringUtils;
 import org.json.JSONArray;
+import org.json.JSONException;
 import org.json.JSONObject;
 
+import com.mashape.unirest.http.Unirest;
+import com.mashape.unirest.http.exceptions.UnirestException;
 import com.postcode.io.PostCodeDetails;
 import com.postcode.io.json.JsonFetcher;
 
@@ -97,4 +100,8 @@ public class Postcode {
  this.json = json;
  }
 
+ public static boolean validatePostcode(String postcode) throws JSONException, UnirestException {
+ return Unirest.get("https://api.postcodes.io/postcodes/".concat(postcode).concat("/validate")).asJson()
+ .getBody().getObject().getBoolean("result");
+ }
 }

src/main/java/com/postcode/io/initializers/PostcodeLookup.java

@@ -3,6 +3,9 @@ package com.postcode.io.initializers;
 import java.net.URL;
 import java.util.List;
 
+import org.json.JSONException;
+
+import com.mashape.unirest.http.exceptions.UnirestException;
 import com.postcode.io.initializers.ReverseGeocoding.Reverse;
 
 /**
@@ -88,4 +91,8 @@ public class PostcodeLookup {
  return new ReverseGeocoding(outcode);
  }
 
+ public static boolean validate(String postcode) throws JSONException, UnirestException {
+ return Postcode.validatePostcode(postcode);
+ }
+
 }

src/test/java/com/postcode/io/initializers/PostcodeLookupTest.java

 package com.postcode.io.initializers;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import java.io.File;
@@ -99,7 +100,13 @@ public class PostcodeLookupTest {
  .getBody().getObject(),
  PostcodeLookup.randomPostcode("bs347np").asjson(), JSONCompareMode.LENIENT);
  assertTrue(PostcodeLookup.randomPostcode().asjson().has("result"));
- assertEquals(200,PostcodeLookup.randomPostcode().asjson().getInt("status"));
+ assertEquals(200, PostcodeLookup.randomPostcode().asjson().getInt("status"));
+ }
+
+ @Test
+ public void testPostcodeValidator() throws JSONException, UnirestException {
+ assertTrue(PostcodeLookup.validate("ST42EU"));
+ assertFalse(PostcodeLookup.validate("ST4"));
  }
 
 }
\ No newline at end of file

src/test/java/com/postcode/io/initializers/PostcodeTest.java

 package com.postcode.io.initializers;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
+import org.json.JSONException;
 import org.junit.Test;
 
+import com.mashape.unirest.http.exceptions.UnirestException;
+
 public class PostcodeTest {
 
  @Test
@@ -21,4 +26,10 @@ public class PostcodeTest {
  }
  }
 
+ @Test
+ public void testPostcodeValidator() throws JSONException, UnirestException {
+ assertTrue(Postcode.validatePostcode("ST42EU"));
+ assertFalse(Postcode.validatePostcode("ST4"));
+ }
+
 }