Added squashfs firmware test

tests/test_firmware_squashfs.py

+from os.path import dirname
+
+import binwalk
+from nose.tools import eq_, ok_
+
+
+def test_firmware_squashfs():
+    '''
+    Test: Open hello-world.srec, scan for signatures
+    verify that only one signature is returned
+    verify that the only signature returned is Motorola S-rec data-signature
+    '''
+    expected_results = [
+            [0, 'DLOB firmware header, boot partition: "dev=/dev/mtdblock/2"'],
+            [112, 'LZMA compressed data, properties: 0x5D, dictionary size: 33554432 bytes, uncompressed size: 3466208 bytes'],
+            [1179760, 'PackImg section delimiter tag, little endian size: 11548416 bytes; big endian size: 3649536 bytes'],
+            [1179792, 'Squashfs filesystem, little endian, version 4.0, compression:lzma, size: 3647665 bytes, 1811 inodes, blocksize: 524288 bytes, created: 2013-09-17 06:43:22'],
+            ]
+
+    scan_result = binwalk.scan(
+        dirname(__file__) + '/input-vectors/firmware.squashfs',
+        signature=True,
+        quiet=True,
+        extract=True)  # Throws a warning for missing external extractor
+    # Test number of modules used
+    eq_(len(scan_result), 1)
+    # Test number of results for that module
+    eq_(len(scan_result[0].results), len(expected_results))
+    # Test result-description
+    for i in range(0, len(scan_result[0].results)):
+        eq_(scan_result[0].results[i].offset, expected_results[i][0])
+        eq_(scan_result[0].results[i].description, expected_results[i][1])