Home | History | Annotate | Download | only in parser 
      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.loganalysis.parser;
     17 
     18 import com.android.loganalysis.item.IItem;
     19 
     20 import junit.framework.TestCase;
     21 
     22 import java.util.ArrayList;
     23 import java.util.List;
     24 
     25 /**
     26  * Unit tests for {@link AbstractSectionParser}
     27  */
     28 public class AbstractSectionParserTest extends TestCase {
     29     AbstractSectionParser mParser = null;
     30 
     31     @Override
     32     public void setUp() throws Exception {
     33         super.setUp();
     34         mParser = new AbstractSectionParser() {
     35             @Override
     36             public IItem parse(List<String> lines) {
     37                 for (String line : lines) {
     38                     parseLine(line);
     39                 }
     40                 commit();
     41                 return null;
     42             }
     43         };
     44     }
     45 
     46     private static class FakeBlockParser implements IParser {
     47         private String mExpected = null;
     48         private int mCalls = 0;
     49 
     50         public FakeBlockParser(String expected) {
     51             mExpected = expected;
     52         }
     53 
     54         public int getCalls() {
     55             return mCalls;
     56         }
     57 
     58         @Override
     59         public IItem parse(List<String> input) {
     60             assertEquals(1, input.size());
     61             assertEquals("parseBlock() got unexpected input!", mExpected, input.get(0));
     62             mCalls += 1;
     63             return null;
     64         }
     65     }
     66 
     67     /**
     68      * Verifies that {@link AbstractSectionParser} switches between parsers as expected
     69      */
     70     public void testSwitchParsers() {
     71         final String lineFormat = "howdy, parser %d!";
     72         final String linePattern = "I spy %d candles";
     73         final int nParsers = 4;
     74         FakeBlockParser[] parsers = new FakeBlockParser[nParsers];
     75         final List<String> lines = new ArrayList<String>(2*nParsers);
     76 
     77         for (int i = 0; i < nParsers; ++i) {
     78             String line = String.format(lineFormat, i);
     79             FakeBlockParser parser = new FakeBlockParser(line);
     80             mParser.addSectionParser(parser, String.format(linePattern, i));
     81             parsers[i] = parser;
     82 
     83             // add the parser trigger
     84             lines.add(String.format(linePattern, i));
     85             // and then add the line that the parser is expecting
     86             lines.add(String.format(lineFormat, i));
     87         }
     88 
     89         mParser.parse(lines);
     90 
     91         // Verify that all the parsers were run
     92         for (int i = 0; i < nParsers; ++i) {
     93             assertEquals(String.format("Parser %d has wrong call count!", i), 1,
     94                     parsers[i].getCalls());
     95         }
     96     }
     97 }
     98 
     99