--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_data_linker.py	Sat Jan 31 11:50:50 2015 -0800
@@ -0,0 +1,89 @@
+import pytest
+from piecrust.data.linker import Linker, RecursiveLinker
+from .mockutil import mock_fs, mock_fs_scope
+
+
+@pytest.mark.parametrize(
+    'fs, page_path, expected',
+    [
+        (mock_fs().withPage('pages/foo'), 'foo.md',
+            [('/foo', True, False)]),
+        ((mock_fs()
+                .withPage('pages/foo')
+                .withPage('pages/bar')),
+            'foo.md',
+            [('/bar', False, False), ('/foo', True, False)]),
+        ((mock_fs()
+                .withPage('pages/baz')
+                .withPage('pages/something/else')
+                .withPage('pages/foo')
+                .withPage('pages/bar')),
+            'foo.md',
+            [('/bar', False, False), ('/baz', False, False),
+                ('/foo', True, False), ('something', False, True)]),
+        ((mock_fs()
+                .withPage('pages/something/else')
+                .withPage('pages/foo')
+                .withPage('pages/something/good')
+                .withPage('pages/bar')),
+            'something/else.md',
+            [('/something/else', True, False),
+                ('/something/good', False, False)])
+    ])
+def test_linker_iteration(fs, page_path, expected):
+    with mock_fs_scope(fs):
+        app = fs.getApp()
+        src = app.getSource('pages')
+        linker = Linker(src, page_path=page_path)
+        actual = list(iter(linker))
+
+        assert len(actual) == len(expected)
+        for i, (a, e) in enumerate(zip(actual, expected)):
+            assert a.is_dir == e[2]
+            if a.is_dir:
+                assert a.name == e[0]
+            else:
+                assert a.url == e[0]
+                assert a.is_self == e[1]
+
+
+@pytest.mark.parametrize(
+        'fs, page_path, expected',
+        [
+            (mock_fs().withPage('pages/foo'), 'foo.md',
+                [('/foo', True)]),
+            ((mock_fs()
+                    .withPage('pages/foo')
+                    .withPage('pages/bar')),
+                'foo.md',
+                [('/bar', False), ('/foo', True)]),
+            ((mock_fs()
+                    .withPage('pages/baz')
+                    .withPage('pages/something/else')
+                    .withPage('pages/foo')
+                    .withPage('pages/bar')),
+                'foo.md',
+                [('/bar', False), ('/baz', False),
+                    ('/foo', True), ('/something/else', False)]),
+            ((mock_fs()
+                    .withPage('pages/something/else')
+                    .withPage('pages/foo')
+                    .withPage('pages/something/good')
+                    .withPage('pages/bar')),
+                'something/else.md',
+                [('/something/else', True),
+                    ('/something/good', False)])
+        ])
+def test_recursive_linker_iteration(fs, page_path, expected):
+    with mock_fs_scope(fs):
+        app = fs.getApp()
+        src = app.getSource('pages')
+        linker = RecursiveLinker(src, page_path=page_path)
+        actual = list(iter(linker))
+
+        assert len(actual) == len(expected)
+        for i, (a, e) in enumerate(zip(actual, expected)):
+            assert a.is_dir is False
+            assert a.url == e[0]
+            assert a.is_self == e[1]
+