/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * This is a series of unit tests for snippet creation and highlighting * * You can run this entire test case with: * runtest -c com.android.emailcommon.utility.TextUtilitiesTests email */ package com.android.emailcommon.utility; import android.test.AndroidTestCase; import android.text.SpannableStringBuilder; import android.text.style.BackgroundColorSpan; public class TextUtilitiesTests extends AndroidTestCase { public void testPlainSnippet() { // Test the simplest cases assertEquals("", TextUtilities.makeSnippetFromPlainText(null)); assertEquals("", TextUtilities.makeSnippetFromPlainText("")); // Test handling leading, trailing, and duplicated whitespace // Just test common whitespace characters; we calls Character.isWhitespace() internally, so // other whitespace should be fine as well assertEquals("", TextUtilities.makeSnippetFromPlainText(" \n\r\t\r\t\n")); char c = TextUtilities.NON_BREAKING_SPACE_CHARACTER; assertEquals("foo", TextUtilities.makeSnippetFromPlainText(c + "\r\n\tfoo \n\t\r" + c)); assertEquals("foo bar", TextUtilities.makeSnippetFromPlainText(c + "\r\n\tfoo \r\n bar\n\t\r" + c)); // Handle duplicated - and = assertEquals("Foo-Bar=Bletch", TextUtilities.makeSnippetFromPlainText("Foo-----Bar=======Bletch")); // We shouldn't muck with HTML entities assertEquals(" >", TextUtilities.makeSnippetFromPlainText(" >")); } public void testHtmlSnippet() { // Test the simplest cases assertEquals("", TextUtilities.makeSnippetFromHtmlText(null)); assertEquals("", TextUtilities.makeSnippetFromHtmlText("")); // Test handling leading, trailing, and duplicated whitespace // Just test common whitespace characters; we calls Character.isWhitespace() internally, so // other whitespace should be fine as well assertEquals("", TextUtilities.makeSnippetFromHtmlText(" \n\r\t\r\t\n")); char c = TextUtilities.NON_BREAKING_SPACE_CHARACTER; assertEquals("foo", TextUtilities.makeSnippetFromHtmlText(c + "\r\n\tfoo \n\t\r" + c)); assertEquals("foo bar", TextUtilities.makeSnippetFromHtmlText(c + "\r\n\tfoo \r\n bar\n\t\r" + c)); // Handle duplicated - and = assertEquals("Foo-Bar=Bletch", TextUtilities.makeSnippetFromPlainText("Foo-----Bar=======Bletch")); // We should catch HTML entities in these tests assertEquals(">", TextUtilities.makeSnippetFromHtmlText(" >")); assertEquals("&<> \"", TextUtilities.makeSnippetFromHtmlText("&<> "")); // Test for decimal and hex entities assertEquals("ABC", TextUtilities.makeSnippetFromHtmlText("ABC")); assertEquals("ABC", TextUtilities.makeSnippetFromHtmlText("ABC")); // Test for stripping simple tags assertEquals("Hi there", TextUtilities.makeSnippetFromHtmlText("Hi there")); // TODO: Add tests here if/when we find problematic HTML } public void testStripHtmlEntityEdgeCases() { int[] skipCount = new int[1]; // Bare & isn't an entity char c = TextUtilities.stripHtmlEntity("&", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // Also not legal c = TextUtilities.stripHtmlEntity("&;", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // This is an entity, but shouldn't be found c = TextUtilities.stripHtmlEntity("&nosuch;", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // This is too long for an entity, even though it starts like a valid one c = TextUtilities.stripHtmlEntity(" andmore;", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // Illegal decimal entities c = TextUtilities.stripHtmlEntity("&#ABC", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); c = TextUtilities.stripHtmlEntity("B", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // Illegal hex entities c = TextUtilities.stripHtmlEntity("઼", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); // Illegal hex entities c = TextUtilities.stripHtmlEntity("G", 0, skipCount); assertEquals(c, '&'); assertEquals(0, skipCount[0]); } public void testStripContent() { assertEquals("Visible", TextUtilities.makeSnippetFromHtmlText( "Visible")); assertEquals("Visible", TextUtilities.makeSnippetFromHtmlText( "Visible")); assertEquals("IsVisible", TextUtilities.makeSnippetFromHtmlText( "IsVisible")); assertEquals("Visible", TextUtilities.makeSnippetFromHtmlText( "VisibleAgainVisible")); assertEquals("VisibleAgainVisible", TextUtilities.makeSnippetFromHtmlText( "VisibleVisible"); assertHighlightUnchanged("IsVisible"); assertHighlightUnchanged("VisibleAgainVisible"); assertHighlightUnchanged("VisibleVisible"; // Test that tags aren't highlighted assertEquals(str, TextUtilities.highlightTermsInHtml( "Visible", "style")); // Test that non-tags are assertEquals("Visible", TextUtilities.highlightTermsInHtml(str, "Visi")); assertEquals("VisibleAgainVisible", TextUtilities.highlightTermsInHtml( "VisibleAgainVisible", "gain")); } public void testHighlightSingleTermText() { // Sprinkle text with a few HTML characters to make sure they're ignored String text = "This< should be visibl>e"; // We should find this, because search terms are case insensitive SpannableStringBuilder ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "Visi"); BackgroundColorSpan[] spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(1, spans.length); BackgroundColorSpan span = spans[0]; assertEquals(text.indexOf("visi"), ssb.getSpanStart(span)); assertEquals(text.indexOf("bl>e"), ssb.getSpanEnd(span)); // Heh; this next test fails.. we use the search term! assertEquals(text, ssb.toString()); // Multiple instances of the term text = "The research word should be a search result"; ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "Search"); spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(2, spans.length); span = spans[0]; assertEquals(text.indexOf("search word"), ssb.getSpanStart(span)); assertEquals(text.indexOf(" word"), ssb.getSpanEnd(span)); span = spans[1]; assertEquals(text.indexOf("search result"), ssb.getSpanStart(span)); assertEquals(text.indexOf(" result"), ssb.getSpanEnd(span)); assertEquals(text, ssb.toString()); } public void testHighlightTwoTermText() { String text = "This should be visible"; // We should find this, because search terms are case insensitive SpannableStringBuilder ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "visi should"); BackgroundColorSpan[] spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(2, spans.length); BackgroundColorSpan span = spans[0]; assertEquals(text.indexOf("should"), ssb.getSpanStart(span)); assertEquals(text.indexOf(" be"), ssb.getSpanEnd(span)); span = spans[1]; assertEquals(text.indexOf("visi"), ssb.getSpanStart(span)); assertEquals(text.indexOf("ble"), ssb.getSpanEnd(span)); assertEquals(text, ssb.toString()); } public void testHighlightDuplicateTermText() { String text = "This should be visible"; // We should find this, because search terms are case insensitive SpannableStringBuilder ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "should should"); BackgroundColorSpan[] spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(1, spans.length); BackgroundColorSpan span = spans[0]; assertEquals(text.indexOf("should"), ssb.getSpanStart(span)); assertEquals(text.indexOf(" be"), ssb.getSpanEnd(span)); } public void testHighlightOverlapTermText() { String text = "This shoulder is visible"; // We should find this, because search terms are case insensitive SpannableStringBuilder ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "should ould"); BackgroundColorSpan[] spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(1, spans.length); BackgroundColorSpan span = spans[0]; assertEquals(text.indexOf("should"), ssb.getSpanStart(span)); assertEquals(text.indexOf("er is"), ssb.getSpanEnd(span)); } public void testHighlightOverlapTermText2() { String text = "The shoulders are visible"; // We should find this, because search terms are case insensitive SpannableStringBuilder ssb = (SpannableStringBuilder)TextUtilities.highlightTermsInText(text, "shoulder shoulders"); BackgroundColorSpan[] spans = ssb.getSpans(0, ssb.length(), BackgroundColorSpan.class); assertEquals(2, spans.length); BackgroundColorSpan span = spans[0]; assertEquals(text.indexOf("shoulder"), ssb.getSpanStart(span)); assertEquals(text.indexOf("s are visible"), ssb.getSpanEnd(span)); span = spans[1]; // Just the 's' should be caught in the 2nd span assertEquals(text.indexOf("s are visible"), ssb.getSpanStart(span)); assertEquals(text.indexOf(" are visible"), ssb.getSpanEnd(span)); assertEquals(text, ssb.toString()); } // For debugging large HTML samples // private String readLargeSnippet(String fn) { // File file = mContext.getFileStreamPath(fn); // StringBuffer sb = new StringBuffer(); // BufferedReader reader = null; // try { // String text; // reader = new BufferedReader(new FileReader(file)); // while ((text = reader.readLine()) != null) { // sb.append(text); // sb.append(" "); // } // } catch (IOException e) { // } // return sb.toString(); // } }