Increase test code coverage.

Jenkinsfile_nightly

@@ -58,23 +58,6 @@ withNightlyPipeline(type, product, component) {
 
     after('fullFunctionalTest') {
 
-        sh "./gradlew smoke"
-
-        archiveArtifacts '**/build/test-results/**/*'
-
-        publishHTML target: [
-            allowMissing         : true,
-            alwaysLinkToLastBuild: true,
-            keepAll              : true,
-            reportDir            : "output",
-            reportFiles          : "idam-web-public-e2e-result.html",
-            reportName           : "IDAM Web Public E2E smoke tests result"
-        ]
-
-        sh "./gradlew functional"
-
-        archiveArtifacts '**/build/test-results/**/*'
-
         publishHTML target: [
             allowMissing : true,
             alwaysLinkToLastBuild: true,

src/main/java/uk/gov/hmcts/reform/idam/web/helper/JSPHelper.java

@@ -1,8 +1,9 @@
 package uk.gov.hmcts.reform.idam.web.helper;
 
 import lombok.NonNull;
-import lombok.SneakyThrows;
 import lombok.experimental.UtilityClass;
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.net.URLCodec;
 import org.springframework.context.MessageSource;
 import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.web.context.request.RequestContextHolder;
@@ -14,15 +15,14 @@
 
 import javax.annotation.Nonnull;
 import javax.servlet.http.HttpServletRequest;
-import java.io.UnsupportedEncodingException;
-import java.net.URLDecoder;
 import java.util.Locale;
 import java.util.Optional;
 
 @UtilityClass
 public class JSPHelper {
 
     private static final UrlPathHelper PATH_HELPER = new UrlPathHelper();
+    private static final URLCodec URL_CODEC = new URLCodec();
     private static MessageSource messageSource;
 
     /**
@@ -31,16 +31,17 @@ public class JSPHelper {
      * @should throw if there is no request in context
      */
     @Nonnull
-    @SneakyThrows(UnsupportedEncodingException.class)
-    public String getOtherLocaleUrl() {
+    public String getOtherLocaleUrl() throws DecoderException {
         final ServletRequestAttributes servletRequestAttributes = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes());
         final HttpServletRequest request = servletRequestAttributes != null ? servletRequestAttributes.getRequest() : null;
         final String targetLocale = getTargetLocale();
 
+
         if (request != null) {
             final String requestUri = PATH_HELPER.getOriginatingRequestUri(request);
             final String originatingQueryString = PATH_HELPER.getOriginatingQueryString(request);
-            final String requestQueryString = originatingQueryString == null ? null : URLDecoder.decode(originatingQueryString, "UTF-8"); //NOSONAR
+            final String requestQueryString; //NOSONAR
+            requestQueryString = originatingQueryString == null ? null : URL_CODEC.decode(originatingQueryString);
             final UriComponentsBuilder initialUrl = UriComponentsBuilder.fromPath(requestUri).replaceQuery(requestQueryString);
 
             return overrideLocaleParameter(initialUrl, targetLocale);
@@ -54,9 +55,9 @@ public String getOtherLocaleUrl() {
      *
      * @should override existing parameter
      * @should add nonexisting parameter
+     * @should throw on any of the parameters being null
      */
     public static String overrideLocaleParameter(@NonNull final UriComponentsBuilder builder, @NonNull final String targetLocale) {
-
         return builder.replaceQueryParam(MessagesConfiguration.UI_LOCALES_PARAM_NAME, new Locale(targetLocale)).toUriString();
     }
 

src/test/java/uk/gov/hmcts/reform/idam/web/helper/JSPHelperTest.java

@@ -56,6 +56,27 @@ public void overrideLocaleParameter_shouldAddNonexistingParameter() {
         Assert.assertEquals(CORRECT_BASE_TEST_URI + targetLocale, rewrittenUrl);
     }
 
+    /**
+     * @verifies throw on any of the parameters being null
+     * @see JSPHelper#overrideLocaleParameter(org.springframework.web.util.UriComponentsBuilder, String)
+     */
+    @Test
+    public void overrideLocaleParameter_shouldThrowOnAnyOfTheParametersBeingNull() {
+        try {
+            JSPHelper.overrideLocaleParameter(UriComponentsBuilder.newInstance(), null);
+            Assert.fail();
+        } catch (NullPointerException e) {
+            // do nothing, expected
+        }
+
+        try {
+            JSPHelper.overrideLocaleParameter(null, "en");
+            Assert.fail();
+        } catch (NullPointerException e) {
+            // do nothing, expected
+        }
+    }
+
     /**
      * @verifies return en if current locale is welsh
      * @see JSPHelper#getTargetLocale()