diff --git a/tests/test_driver.py b/tests/test_driver.py
new file mode 100644
index 0000000..c985f46
--- /dev/null
+++ b/tests/test_driver.py
@@ -0,0 +1,136 @@
+
+from __future__ import absolute_import, division, print_function
+
+import os
+import time
+import errno
+import random
+import shutil
+
+try:
+    from types import SimpleNamespace
+except ImportError:
+    from utils import SimpleNamespace
+
+from tldp.outputs import OutputNamingConvention
+from tldptesttools import TestToolsFilesystem
+
+# -- Test Data
+import example
+
+# -- SUT
+from tldp.driver import Inventory
+
+datadir = os.path.join(os.path.dirname(__file__), 'testdata')
+
+
+class TestOutputDirSkeleton(OutputNamingConvention):
+
+    def mkdir(self):
+        if not os.path.isdir(self.dirname):
+            os.mkdir(self.dirname)
+
+    def create_expected_docs(self):
+        for name in self.expected:
+            fname = getattr(self, name)
+            with open(fname, 'w'):
+                pass
+
+
+class TestSourceDocSkeleton(object):
+
+    def __init__(self, dirname):
+        if not os.path.abspath(dirname):
+            raise Exception("Please use absolute path in unit tests....")
+        self.dirname = dirname
+        if not os.path.isdir(self.dirname):
+            os.mkdir(self.dirname)
+
+    def addsourcefile(self, filename, content):
+        fname = os.path.join(self.dirname, filename)
+        if os.path.isfile(content):
+            shutil.copy(content, fname)
+        else:
+            with open(fname, 'w') as f:
+               f.write(content)
+
+
+class TestInventoryBase(TestToolsFilesystem):
+
+    def setupcollections(self):
+        self.pubdir = os.path.join(self.tempdir, 'outputs')
+        self.sourcedir = os.path.join(self.tempdir, 'sources')
+        self.sourcedirs = [self.sourcedir]
+        for d in (self.sourcedir, self.pubdir):
+            if not os.path.isdir(d):
+                os.mkdir(d)
+
+    def add_stale(self, stem, ex):
+        self.setupcollections()
+        myoutput = TestOutputDirSkeleton(os.path.join(self.pubdir, stem), stem)
+        myoutput.mkdir()
+        myoutput.create_expected_docs()
+        time.sleep(0.002)
+        mysource = TestSourceDocSkeleton(self.sourcedir)
+        mysource.addsourcefile(stem + ex.ext, ex.filename)
+
+    def add_new(self, stem, ex):
+        self.setupcollections()
+        mysource = TestSourceDocSkeleton(self.sourcedir)
+        mysource.addsourcefile(stem + ex.ext, ex.filename)
+
+    def add_orphan(self, stem, ex):
+        self.setupcollections()
+        myoutput = TestOutputDirSkeleton(os.path.join(self.pubdir, stem), stem)
+        myoutput.mkdir()
+        myoutput.create_expected_docs()
+
+    def add_published(self, stem, ex):
+        self.setupcollections()
+        mysource = TestSourceDocSkeleton(self.sourcedir)
+        mysource.addsourcefile(stem + ex.ext, ex.filename)
+        myoutput = TestOutputDirSkeleton(os.path.join(self.pubdir, stem), stem)
+        myoutput.mkdir()
+        myoutput.create_expected_docs()
+
+
+class TestInventoryUsage(TestInventoryBase):
+
+    def test_detect_status_published(self):
+        ex = random.choice(example.sources)
+        self.add_published('Frobnitz-HOWTO', ex)
+        i = Inventory(self.pubdir, self.sourcedirs)
+        self.assertEquals(0, len(i.stale))
+        self.assertEquals(1, len(i.published))
+        self.assertEquals(0, len(i.new))
+        self.assertEquals(0, len(i.orphans))
+
+    def test_detect_status_new(self):
+        ex = random.choice(example.sources)
+        self.add_new('Frobnitz-HOWTO', ex)
+        i = Inventory(self.pubdir, self.sourcedirs)
+        self.assertEquals(0, len(i.stale))
+        self.assertEquals(0, len(i.published))
+        self.assertEquals(1, len(i.new))
+        self.assertEquals(0, len(i.orphans))
+
+    def test_detect_status_orphan(self):
+        ex = random.choice(example.sources)
+        self.add_orphan('Frobnitz-HOWTO', ex)
+        i = Inventory(self.pubdir, self.sourcedirs)
+        self.assertEquals(0, len(i.stale))
+        self.assertEquals(0, len(i.published))
+        self.assertEquals(0, len(i.new))
+        self.assertEquals(1, len(i.orphans))
+
+    def test_detect_status_stale(self):
+        ex = random.choice(example.sources)
+        self.add_stale('Frobnitz-HOWTO', ex)
+        i = Inventory(self.pubdir, self.sourcedirs)
+        self.assertEquals(1, len(i.stale))
+        self.assertEquals(1, len(i.published))
+        self.assertEquals(0, len(i.new))
+        self.assertEquals(0, len(i.orphans))
+
+#
+# -- end of file
diff --git a/tldp/driver.py b/tldp/driver.py
index f7a7bd2..4f9811a 100644
--- a/tldp/driver.py
+++ b/tldp/driver.py
@@ -70,7 +70,7 @@ class Inventory(object):
             fset = mtime_gt(mtime, sdoc.statinfo)
             if fset:
                 for f in fset:
-                    logger.info("%s updated source file %s", stem, f)
+                    logger.debug("%s found updated source file %s", stem, f)
                 odoc.status = sdoc.status = 'stale'
                 self.stale[stem] = sdoc
         logger.info("Identified %d stale documents: %r.", len(self.stale),