diff --git a/test/utils.js b/test/utils.js
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+++ b/test/utils.js
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+var utils = require('../lib/utils');
+
+describe('utils', function () {
+
+  describe('get', function () {
+
+    it('returns value at "#" key by default', function () {
+      assert.strictEqual(utils.get({ '#': 'foo' }), 'foo');
+    });
+
+    it('returns value at specified subkey', function () {
+      assert.strictEqual(utils.get({ bar: 'baz' }, 'bar'), 'baz');
+    });
+
+    it('returns null by default when key is missing', function () {
+      assert.strictEqual(utils.get({ bar: 'baz' }), null);
+    });
+
+    it('returns custom defaultValue when key is missing', function () {
+      assert.strictEqual(utils.get({}, 'missing', 'fallback'), 'fallback');
+    });
+
+    it('uses "#" subkey on first element when obj is an array', function () {
+      assert.strictEqual(utils.get([{ '#': 'first' }, { '#': 'second' }]), 'first');
+    });
+
+    it('uses specified subkey on first element when obj is an array', function () {
+      assert.strictEqual(utils.get([{ foo: 'bar' }], 'foo'), 'bar');
+    });
+
+    it('returns null when array element is missing the key', function () {
+      assert.strictEqual(utils.get([{}]), null);
+    });
+
+  });
+
+  describe('safeTrim', function () {
+
+    it('trims whitespace from strings', function () {
+      assert.strictEqual(utils.safeTrim('  hello  '), 'hello');
+    });
+
+    it('trims only leading whitespace', function () {
+      assert.strictEqual(utils.safeTrim('  hello'), 'hello');
+    });
+
+    it('trims only trailing whitespace', function () {
+      assert.strictEqual(utils.safeTrim('hello  '), 'hello');
+    });
+
+    it('returns an empty string unchanged', function () {
+      assert.strictEqual(utils.safeTrim(''), '');
+    });
+
+    it('passes through numbers without throwing', function () {
+      assert.strictEqual(utils.safeTrim(42), 42);
+    });
+
+    it('passes through null without throwing', function () {
+      assert.strictEqual(utils.safeTrim(null), null);
+    });
+
+    it('passes through undefined without throwing', function () {
+      assert.strictEqual(utils.safeTrim(undefined), undefined);
+    });
+
+    it('passes through objects without throwing', function () {
+      var obj = { a: 1 };
+      assert.strictEqual(utils.safeTrim(obj), obj);
+    });
+
+  });
+
+  describe('resolve', function () {
+
+    it('resolves a relative path using "../" against a base URL', function () {
+      assert.strictEqual(
+        utils.resolve('http://example.com/foo/bar', '../baz'),
+        'http://example.com/baz'
+      );
+    });
+
+    it('resolves a relative path using "./" against a base URL', function () {
+      assert.strictEqual(
+        utils.resolve('http://example.com/foo/bar', './baz'),
+        'http://example.com/foo/baz'
+      );
+    });
+
+    it('resolves a relative path without path prefix against a base URL', function () {
+      assert.strictEqual(
+        utils.resolve('http://example.com/foo/bar', 'baz'),
+        'http://example.com/foo/baz'
+      );
+    });
+
+    it('resolves an absolute path URL against a base URL', function () {
+      assert.strictEqual(
+        utils.resolve('http://example.com/foo/', '/images/pic.png'),
+        'http://example.com/images/pic.png'
+      );
+    });
+
+    it('returns an absolute URL unchanged', function () {
+      assert.strictEqual(
+        utils.resolve('http://example.com/', 'http://other.com/img.png'),
+        'http://other.com/img.png'
+      );
+    });
+
+    it('returns pathUrl when baseUrl is falsy', function () {
+      assert.strictEqual(utils.resolve(null, '/path'), '/path');
+      assert.strictEqual(utils.resolve('', '/path'), '/path');
+      assert.strictEqual(utils.resolve(undefined, '/path'), '/path');
+    });
+
+    it('returns pathUrl when pathUrl is falsy', function () {
+      assert.strictEqual(utils.resolve('http://example.com/', null), null);
+      assert.strictEqual(utils.resolve('http://example.com/', ''), '');
+      assert.strictEqual(utils.resolve('http://example.com/', undefined), undefined);
+    });
+
+    it('returns pathUrl for tag: URIs that the URL constructor rejects', function () {
+      var tagUri = 'tag:example.com,2003:posts/1';
+      assert.strictEqual(utils.resolve('http://example.com/', tagUri), tagUri);
+    });
+
+    it('returns pathUrl for other non-http schemes', function () {
+      var urn = 'urn:isbn:0451450523';
+      assert.strictEqual(utils.resolve('http://example.com/', urn), urn);
+    });
+
+  });
+
+  describe('isAbsoluteUrl', function () {
+
+    it('returns true for http URLs', function () {
+      assert.strictEqual(utils.isAbsoluteUrl('http://example.com/'), true);
+    });
+
+    it('returns true for https URLs', function () {
+      assert.strictEqual(utils.isAbsoluteUrl('https://example.com/path'), true);
+    });
+
+    it('returns false for relative URLs', function () {
+      assert.strictEqual(utils.isAbsoluteUrl('/relative/path'), false);
+    });
+
+    it('returns false for relative paths without leading slash', function () {
+      assert.strictEqual(utils.isAbsoluteUrl('relative/path'), false);
+    });
+
+    it('returns false for tag: URIs (no host)', function () {
+      assert.strictEqual(utils.isAbsoluteUrl('tag:example.com,2003:posts/1'), false);
+    });
+
+    it('returns false for empty string', function () {
+      assert.strictEqual(utils.isAbsoluteUrl(''), false);
+    });
+
+    it('returns false for null', function () {
+      assert.strictEqual(utils.isAbsoluteUrl(null), false);
+    });
+
+    it('returns false for undefined', function () {
+      assert.strictEqual(utils.isAbsoluteUrl(undefined), false);
+    });
+
+    it('returns false for non-string values', function () {
+      assert.strictEqual(utils.isAbsoluteUrl(42), false);
+      assert.strictEqual(utils.isAbsoluteUrl({}), false);
+    });
+
+  });
+
+  describe('nslookup', function () {
+
+    it('returns true when URI matches the given default namespace', function () {
+      assert.strictEqual(utils.nslookup('http://www.w3.org/2005/Atom', 'atom'), true);
+    });
+
+    it('returns true for atom v0.3 URI', function () {
+      assert.strictEqual(utils.nslookup('http://purl.org/atom/ns#', 'atom'), true);
+    });
+
+    it('returns false when URI does not match the given default', function () {
+      assert.strictEqual(utils.nslookup('http://www.w3.org/2005/Atom', 'rdf'), false);
+    });
+
+    it('returns false for unknown URI', function () {
+      assert.strictEqual(utils.nslookup('http://unknown.example.com/', 'atom'), false);
+    });
+
+    it('returns false for undefined URI', function () {
+      assert.strictEqual(utils.nslookup(undefined, 'atom'), false);
+    });
+
+  });
+
+  describe('nsprefix', function () {
+
+    it('returns the namespace prefix for a known URI', function () {
+      assert.strictEqual(utils.nsprefix('http://www.w3.org/2005/Atom'), 'atom');
+    });
+
+    it('returns "dc" for Dublin Core URI', function () {
+      assert.strictEqual(utils.nsprefix('http://purl.org/dc/elements/1.1/'), 'dc');
+    });
+
+    it('returns "media" for Yahoo media RSS URI', function () {
+      assert.strictEqual(utils.nsprefix('http://search.yahoo.com/mrss/'), 'media');
+    });
+
+    it('returns undefined for unknown URI', function () {
+      assert.strictEqual(utils.nsprefix('http://unknown.example.com/'), undefined);
+    });
+
+  });
+
+  describe('reresolve', function () {
+
+    it('returns false when node is falsy', function () {
+      assert.strictEqual(utils.reresolve(null, 'http://example.com/'), false);
+      assert.strictEqual(utils.reresolve(undefined, 'http://example.com/'), false);
+    });
+
+    it('returns false when baseurl is falsy', function () {
+      assert.strictEqual(utils.reresolve({ link: { '#': '/foo' } }, null), false);
+      assert.strictEqual(utils.reresolve({ link: { '#': '/foo' } }, ''), false);
+    });
+
+    it('resolves "#" on link elements', function () {
+      var node = { link: { '#': '/foo' } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.link['#'], 'http://example.com/foo');
+    });
+
+    it('resolves "#" on logo elements', function () {
+      var node = { logo: { '#': '/logo.png' } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.logo['#'], 'http://example.com/logo.png');
+    });
+
+    it('resolves "#" on icon elements', function () {
+      var node = { icon: { '#': '/favicon.ico' } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.icon['#'], 'http://example.com/favicon.ico');
+    });
+
+    it('resolves image.url["#"]', function () {
+      var node = { image: { url: { '#': '/img.png' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.image.url['#'], 'http://example.com/img.png');
+    });
+
+    it('resolves image.link["#"]', function () {
+      var node = { image: { link: { '#': '/target' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.image.link['#'], 'http://example.com/target');
+    });
+
+    it('resolves href attributes', function () {
+      var node = { entry: { '@': { href: '/page' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.entry['@'].href, 'http://example.com/page');
+    });
+
+    it('resolves src attributes', function () {
+      var node = { img: { '@': { src: '/image.png' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.img['@'].src, 'http://example.com/image.png');
+    });
+
+    it('resolves uri attributes', function () {
+      var node = { el: { '@': { uri: '/resource' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.el['@'].uri, 'http://example.com/resource');
+    });
+
+    it('handles array of element items', function () {
+      var node = {
+        link: [
+          { '#': '/first' },
+          { '#': '/second' }
+        ]
+      };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.link[0]['#'], 'http://example.com/first');
+      assert.strictEqual(node.link[1]['#'], 'http://example.com/second');
+    });
+
+    it('does not modify non-url attributes', function () {
+      var node = { el: { '@': { type: 'text/html' } } };
+      utils.reresolve(node, 'http://example.com/');
+      assert.strictEqual(node.el['@'].type, 'text/html');
+    });
+
+    it('does not attempt to resolve non-string href values', function () {
+      var node = { el: { '@': { href: 42 } } };
+      assert.doesNotThrow(function () {
+        utils.reresolve(node, 'http://example.com/');
+      });
+      assert.strictEqual(node.el['@'].href, 42);
+    });
+
+  });
+
+  describe('stripHtml', function () {
+
+    it('removes simple HTML tags', function () {
+      assert.strictEqual(utils.stripHtml('<b>bold</b>'), 'bold');
+    });
+
+    it('removes multiple tags', function () {
+      assert.strictEqual(utils.stripHtml('<p>Hello <strong>world</strong></p>'), 'Hello world');
+    });
+
+    it('removes self-closing tags', function () {
+      assert.strictEqual(utils.stripHtml('before<br/>after'), 'beforeafter');
+    });
+
+    it('removes tags with attributes', function () {
+      assert.strictEqual(utils.stripHtml('<a href="http://example.com">link</a>'), 'link');
+    });
+
+    it('returns the string unchanged when there are no tags', function () {
+      assert.strictEqual(utils.stripHtml('plain text'), 'plain text');
+    });
+
+    it('returns an empty string for an empty string', function () {
+      assert.strictEqual(utils.stripHtml(''), '');
+    });
+
+  });
+
+});