add tests for CRC fixes

test/crc/index.js

@@ -0,0 +1,44 @@
+;(function () {
+    var assert = require('assert');
+    var path = require('path');
+    var Zip = require('../../adm-zip');
+
+    testGoodCrc();
+    testBadCrc();
+
+    // Good CRC
+    function testGoodCrc() {
+        var goodZip = new Zip(path.join(__dirname, 'good_crc.zip'));
+        var entries = goodZip.getEntries();
+        assert(entries.length === 1, 'Good CRC: Test archive contains exactly 1 file');
+
+        var testFile = entries.filter(function (entry) {
+            return entry.entryName === 'lorem_ipsum.txt';
+        });
+        assert(testFile.length === 1, 'Good CRC: lorem_ipsum.txt file exists as archive entry');
+
+        var testFileEntryName = testFile[0].entryName;
+        goodZip.readAsTextAsync(testFileEntryName, function (data, err) {
+            assert(!err, 'Good CRC: error object not present');
+            assert(data && data.length, 'Good CRC: buffer not empty');
+        });
+    }
+
+    // Bad CRC
+    function testBadCrc() {
+        var badZip = new Zip(path.join(__dirname, 'bad_crc.zip'));
+        var entries = badZip.getEntries();
+        assert(entries.length === 1, 'Bad CRC: Test archive contains exactly 1 file');
+
+        var testFile = entries.filter(function (entry) {
+            return entry.entryName === 'lorem_ipsum.txt';
+        });
+        assert(testFile.length === 1, 'Bad CRC: lorem_ipsum.txt file exists as archive entry');
+
+        var testFileEntryName = testFile[0].entryName;
+        badZip.readAsTextAsync(testFileEntryName, function (data, err) {
+            assert(data && data.length, 'Bad CRC: buffer not empty');
+            assert(err, 'Bad CRC: error object present');
+        });
+    }
+})();