Regression test for the dircache module, contributed by Nick Mathewson.

Modified by Fred Drake.
This closes SF patch #440827.

Lib/test/test_dircache.py

@@ -0,0 +1,62 @@
+"""
+  Test cases for the dircache module
+  Nick Mathewson
+"""
+
+import unittest
+from test_support import run_unittest, TESTFN
+import dircache, os, time
+
+
+class DircacheTests(unittest.TestCase):
+    def setUp(self):
+        self.tempdir = TESTFN+"_dir"
+        os.mkdir(self.tempdir)
+
+    def tearDown(self):
+        for fname in os.listdir(self.tempdir):
+            self.delTemp(fname)
+        os.rmdir(self.tempdir)
+
+    def writeTemp(self, fname):
+        f = open(os.path.join(self.tempdir, fname), 'w')
+        f.close()
+
+    def mkdirTemp(self, fname):
+        os.mkdir(os.path.join(self.tempdir, fname))
+
+    def delTemp(self, fname):
+        fname = os.path.join(self.tempdir, fname)
+        if os.path.isdir(fname):
+            os.rmdir(fname)
+        else:
+            os.unlink(fname)
+    
+    def test_listdir(self):
+        ## SUCCESSFUL CASES
+        entries = dircache.listdir(self.tempdir)
+        self.assertEquals(entries, [])
+
+        # Check that cache is actually caching, not just passing through.
+        self.assert_(dircache.listdir(self.tempdir) is entries) 
+        
+        # Sadly, dircache has the same granularity as stat.mtime, and so
+        # can't notice any changes that occured within 1 sec of the last
+        # time it examined a directory.
+        time.sleep(1)
+        self.writeTemp("test1")
+        entries = dircache.listdir(self.tempdir)
+        self.assertEquals(entries, ['test1'])
+        self.assert_(dircache.listdir(self.tempdir) is entries)
+        
+        ## UNSUCCESSFUL CASES
+        self.assertEquals(dircache.listdir(self.tempdir+"_nonexistent"), [])
+
+    def test_annotate(self):
+        self.writeTemp("test2")
+        self.mkdirTemp("A")
+        lst = ['A', 'test2', 'test_nonexistent']
+        dircache.annotate(self.tempdir, lst)
+        self.assertEquals(lst, ['A/', 'test2', 'test_nonexistent'])
+
+run_unittest(DircacheTests)