Bug 1265708 - Pre: Implement StringUtils.stripRef r=sebastian

MozReview-Commit-ID: AO25iiUMXLE

--HG--
extra : rebase_source : 92282861ec7ab119cf104fd5aa7d904008cc5d75
extra : source : 974090a524da56fad3b8045b19461e9ae6817529

mobile/android/base/java/org/mozilla/gecko/util/StringUtils.java

@@ -62,6 +62,26 @@ public class StringUtils {
         return wasSearchQuery;
     }
 
+    /**
+     * Strip the ref from a URL, if present
+     *
+     * @return The base URL, without the ref. The original String is returned if it has no ref,
+     *         of if the input is malformed.
+     */
+    public static String stripRef(final String inputURL) {
+        if (inputURL == null) {
+            return null;
+        }
+
+        final int refIndex = inputURL.indexOf('#');
+
+        if (refIndex >= 0) {
+            return inputURL.substring(0, refIndex);
+        }
+
+        return inputURL;
+    }
+
     public static class UrlFlags {
         public static final int NONE = 0;
         public static final int STRIP_HTTPS = 1;

mobile/android/tests/background/junit4/src/org/mozilla/gecko/util/TestStringUtils.java

@@ -11,6 +11,8 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mozilla.gecko.background.testhelpers.TestRunner;
 
+import static org.junit.Assert.assertEquals;
+
 @RunWith(TestRunner.class)
 public class TestStringUtils {
     @Test
@@ -40,4 +42,15 @@ public class TestStringUtils {
         Assert.assertFalse(StringUtils.isHttpOrHttps("google.com"));
         Assert.assertFalse(StringUtils.isHttpOrHttps("git@github.com:mozilla/gecko-dev.git"));
     }
+
+    @Test
+    public void testStripRef() {
+        assertEquals(StringUtils.stripRef(null), null);
+        assertEquals(StringUtils.stripRef(""), "");
+
+        assertEquals(StringUtils.stripRef("??AAABBBCCC"), "??AAABBBCCC");
+        assertEquals(StringUtils.stripRef("https://mozilla.org"), "https://mozilla.org");
+        assertEquals(StringUtils.stripRef("https://mozilla.org#BBBB"), "https://mozilla.org");
+        assertEquals(StringUtils.stripRef("https://mozilla.org/#BBBB"), "https://mozilla.org/");
+    }
 }