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diff --git a/node_modules/ua-parser/js/test/os.js b/node_modules/ua-parser/js/test/os.js
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+++ b/node_modules/ua-parser/js/test/os.js
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+var assert = require('assert'),
+    OS = require('../lib/os').OS,
+    makeParser = require('../lib/os').makeParser;
+
+suite('os object', function() {
+  test('OS constructor with no arguments', function() {
+    var os = new OS();
+    assert.strictEqual(os.family, 'Other');
+    assert.strictEqual(os.major, null);
+    assert.strictEqual(os.minor, null);
+    assert.strictEqual(os.patch, null);
+    assert.strictEqual(os.patchMinor, null);
+  });
+
+  test('OS constructor with valid arguments', function() {
+    var os = new OS('Bar', '4', '3', '2', '1');
+    assert.strictEqual(os.family, 'Bar');
+    assert.strictEqual(os.major, '4');
+    assert.strictEqual(os.minor, '3');
+    assert.strictEqual(os.patch, '2');
+    assert.strictEqual(os.patchMinor, '1');
+  });
+
+  test('OS#toVersionString with only numerical args', function() {
+    assert.strictEqual(new OS('Bar', '4', '3', '2', '1').toVersionString(), '4.3.2.1');
+    assert.strictEqual(new OS('Bar', '4', '3', '2').toVersionString(), '4.3.2');
+    assert.strictEqual(new OS('Bar', '4', '3').toVersionString(), '4.3');
+    assert.strictEqual(new OS('Bar', '4').toVersionString(), '4');
+    assert.strictEqual(new OS('Bar').toVersionString(), '');
+  });
+
+  test('OS#toVersionString with non numerical args', function() {
+    assert.strictEqual(new OS('Bar', '4', '3', '2', 'beta').toVersionString(), '4.3.2beta');
+    assert.strictEqual(new OS('Bar', '4', '3', 'beta').toVersionString(), '4.3beta');
+  });
+
+  test('OS#toString for known OS', function() {
+    assert.strictEqual(new OS('Bar', '4', '3', '2', '1').toString(), 'Bar 4.3.2.1');
+  });
+
+  test('OS#toString for unknown OS', function() {
+    assert.strictEqual(new OS().toString(), 'Other');
+  });
+});
+
+suite('OS parser', function() {
+  test('makeParser returns a function', function() {
+    assert.equal(typeof makeParser([]), 'function');
+  });
+
+  test('Unexpected args don\'t throw', function() {
+    var parse = makeParser([]);
+    assert.doesNotThrow(function() { parse('Foo'); });
+    assert.doesNotThrow(function() { parse(''); });
+    assert.doesNotThrow(function() { parse(); });
+    assert.doesNotThrow(function() { parse(null); });
+    assert.doesNotThrow(function() { parse({}); });
+    assert.doesNotThrow(function() { parse(123); });
+  });
+
+  test('Parser returns an instance of OS when unsuccessful at parsing', function() {
+    var parse = makeParser([]);
+    assert.ok(parse('foo') instanceof OS);
+  });
+
+  test('Parser returns an instance of OS when sucessful', function() {
+    var parse = makeParser([{regex: 'foo'}]);
+    assert.ok(parse('foo') instanceof OS);
+  });
+
+  test('Parser correctly identifies OS name', function() {
+    var parse = makeParser([{regex: '(foo)'}]);
+    assert.strictEqual(parse('foo').family, 'foo');
+  });
+
+  test('Parser correctly identifies version numbers', function() {
+    var parse = makeParser([{regex: '(foo) (\\d)\\.(\\d).(\\d)\\.(\\d)'}]),
+        os = parse('foo 1.2.3.4');
+    assert.strictEqual(os.family, 'foo');
+    assert.strictEqual(os.major, '1');
+    assert.strictEqual(os.minor, '2');
+    assert.strictEqual(os.patch, '3');
+    assert.strictEqual(os.patchMinor, '4');
+  });
+
+  test('Parser correctly processes replacements', function() {
+    var parse = makeParser([{
+      regex: '(foo) (\\d)\\.(\\d)\\.(\\d)\\.(\\d)',
+      os_replacement: '$1bar',
+      os_v1_replacement: 'a',
+      os_v2_replacement: 'b',
+      os_v3_replacement: 'c',
+      os_v4_replacement: 'd'
+    }]);
+
+    var os = parse('foo 1.2.3.4');
+    assert.strictEqual(os.family, 'foobar');
+    assert.strictEqual(os.major, 'a');
+    assert.strictEqual(os.minor, 'b');
+    assert.strictEqual(os.patch, 'c');
+  });
+});
+