implement validations of pagination URLs

javatests/org/chromium/distiller/PageParameterDetectorTest.java

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.distiller;
-
-public class PageParameterDetectorTest extends DomDistillerJsTestCase {
-
-    public void testIsLastNumericPathComponentBad() {
-        // Path component is not numeric i.e. contains non-digits.
-        String url = "http://www.foo.com/a2";
-        int digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // Numeric path component is first.
-        url = "http://www.foo.com/2";
-        digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // Numeric path component follows a path component that is not a bad page param name.
-        url = "http://www.foo.com/good/2";
-        digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // Numeric path component follows a path component that is a bad page param name.
-        url = "http://www.foo.com/wiki/2";
-        digitStart = url.indexOf("2");
-        assertTrue(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // (s)htm(l) extension doesn't follow digit.
-        url = "http://www.foo.com/2a";
-        digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // .htm follows digit, previous path component is not a bad page param name.
-        url = "http://www.foo.com/good/2.htm";
-        digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // .html follows digit, previous path component is a bad page param name.
-        url = "http://www.foo.com/wiki/2.html";
-        digitStart = url.indexOf("2");
-        assertTrue(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-
-        // .shtml follows digit, previous path component is not a bad page param name, but the one
-        // before that is.
-        url = "http://www.foo.com/wiki/good/2.shtml";
-        digitStart = url.indexOf("2");
-        assertFalse(PageParameterDetector.isLastNumericPathComponentBad(url, 18, digitStart,
-                digitStart + 1));
-    }
-
-}