### Question:
XMLParser { List<BlockInfo> parseLine(String line) throws IOException { if (line.contains("<inode>")) { transitionTo(State.INODE); } if (line.contains("<type>FILE</type>")) { transitionTo(State.FILE); } List<String> replicationStrings = valuesFromXMLString(line, "replication"); if (!replicationStrings.isEmpty()) { if (replicationStrings.size() > 1) { throw new IOException(String.format("Found %s replication strings", replicationStrings.size())); } transitionTo(State.FILE_WITH_REPLICATION); currentReplication = Short.parseShort(replicationStrings.get(0)); } Matcher blockMatcher = BLOCK_PATTERN.matcher(line); List<BlockInfo> blockInfos = new ArrayList<>(); while (blockMatcher.find()) { if (currentState != State.FILE_WITH_REPLICATION) { throw new IOException("Found a block string when in state: " + currentState); } long id = Long.parseLong(blockMatcher.group(1)); long gs = Long.parseLong(blockMatcher.group(2)); long size = Long.parseLong(blockMatcher.group(3)); blockInfos.add(new BlockInfo(id, gs, size, currentReplication)); } if (line.contains("</inode>")) { transitionTo(State.DEFAULT); } return blockInfos; }    }### Answer:
@Test public void testBlocksFromLine() throws Exception { String[] lines = { "<INodeSection><lastInodeId>1" + "</lastInodeId><inode><id>2</id><type>FILE</type>" + "<name>fake-file</name>" + "<replication>3</replication><mtime>3</mtime>" + "<atime>4</atime>" + "<perferredBlockSize>5</perferredBlockSize>" + "<permission>hdfs:hdfs:rw-------</permission>" + "<blocks><block><id>6</id><genstamp>7</genstamp>" + "<numBytes>8</numBytes></block>" + "<block><id>9</id><genstamp>10</genstamp>" + "<numBytes>11</numBytes></block></inode>", "<inode><type>DIRECTORY</type></inode>", "<inode><type>FILE</type>", "<replication>12</replication>", "<blocks><block><id>13</id><genstamp>14</genstamp><numBytes>15</numBytes></block>", "</inode>" }; Map<BlockInfo, Short> expectedBlockCount = new HashMap<>(); expectedBlockCount.put(new BlockInfo(6, 7, 8), (short) 3); expectedBlockCount.put(new BlockInfo(9, 10, 11), (short) 3); expectedBlockCount.put(new BlockInfo(13, 14, 15), (short) 12); final Map<BlockInfo, Short> actualBlockCount = new HashMap<>(); XMLParser parser = new XMLParser(); for (String line : lines) { for (BlockInfo info : parser.parseLine(line)) { actualBlockCount.put(info, info.getReplication()); } } for (Map.Entry<BlockInfo, Short> expect : expectedBlockCount.entrySet()) { assertEquals(expect.getValue(), actualBlockCount.get(expect.getKey())); } }