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diff --git a/tags/2.3/src/test/groovy/org/mockftpserver/fake/filesystem/UnixFakeFileSystemTest.groovy b/tags/2.3/src/test/groovy/org/mockftpserver/fake/filesystem/UnixFakeFileSystemTest.groovy
new file mode 100644
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+++ b/tags/2.3/src/test/groovy/org/mockftpserver/fake/filesystem/UnixFakeFileSystemTest.groovy
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2008 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.mockftpserver.fake.filesystem
+
+/**
+ * Tests for UnixFakeFileSystem.
+ *
+ * @version $Revision$ - $Date$
+ *
+ * @author Chris Mair
+ */
+class UnixFakeFileSystemTest extends AbstractFakeFileSystemTestCase {
+
+    private static final String SEP = "/"
+
+    UnixFakeFileSystemTest() {
+        // These need to be set in the constructor because these values are used in setUp()
+        NEW_DIR = SEP + NEW_DIRNAME
+        NEW_FILE = "/NewFile.txt"
+        EXISTING_DIR = "/"
+        EXISTING_FILE = "/ExistingFile.txt"
+        NO_SUCH_DIR = "/xx/yy"
+        NO_SUCH_FILE = "/xx/yy/zz.txt"
+    }
+
+
+    void testListNames_FromRoot() {
+        final DIR = '/'
+        final FILENAME = 'abc.txt'
+        final FILE = p(DIR, FILENAME)
+
+        assert !fileSystem.exists(FILE)
+        fileSystem.add(new FileEntry(FILE))
+        def names = fileSystem.listNames(DIR)
+        assert names.find { it == FILENAME }
+    }
+
+    void testPath() {
+        assert fileSystem.path(null, null) == ""
+        assert fileSystem.path(null, "abc") == "abc"
+        assert fileSystem.path("abc", null) == "abc"
+        assert fileSystem.path("", "") == ""
+        assert fileSystem.path("", "abc") == "abc"
+        assert fileSystem.path("abc", "") == "abc"
+        assert fileSystem.path("abc", "DEF") == "abc/DEF"
+        assert fileSystem.path("abc/", "def") == "abc/def"
+        assert fileSystem.path("/abc/", "def") == "/abc/def"
+        assert fileSystem.path("/ABC", "/def") == "/ABC/def"
+        assert fileSystem.path("abc", "/def") == "abc/def"
+        assert fileSystem.path("abc", "def/..") == "abc"
+        assert fileSystem.path("abc", "./def") == "abc/def"
+        assert fileSystem.path("abc/.", null) == "abc"
+    }
+
+    void testNormalize() {
+        assert fileSystem.normalize("/") == "/"
+        assert fileSystem.normalize("/aBc") == "/aBc"
+        assert fileSystem.normalize("/abc/DEF") == "/abc/DEF"
+        assert fileSystem.normalize("/Abc/def/..") == "/Abc"
+        assert fileSystem.normalize("/abc/def/../ghi") == "/abc/ghi"
+        assert fileSystem.normalize("/abc/def/.") == "/abc/def"
+        assert fileSystem.normalize("/abc/def/./gHI") == "/abc/def/gHI"
+    }
+
+    void testGetName() {
+        assert fileSystem.getName("/") == ""
+        assert fileSystem.getName("/aBC") == "aBC"
+        assert fileSystem.getName("/abc/def") == "def"
+        assert fileSystem.getName("/abc/def/../GHI") == "GHI"
+    }
+
+    public void testGetParent() {
+        assert fileSystem.getParent("/") == null
+        assert fileSystem.getParent("/abc") == "/"
+        assert fileSystem.getParent("/abc/def") == "/abc"
+    }
+
+    void testIsValidName() {
+        ["/abc",
+                "/test/",
+                "/ABC/def",
+                "/abc/d!ef",
+                "/abc/DEF/h(ij)!@#\$%^&*()-_+=~`,.<>?;:[]{}\\|abc",
+        ].each {
+            assert fileSystem.isValidName(it), "[$it]"
+        }
+
+        ["",
+                "abc",
+                "abc/def",
+                "a:/abc:",
+                "//a*bc",
+                "C:/?abc",
+        ].each {
+            assert !fileSystem.isValidName(it), "[$it]"
+        }
+    }
+
+    void testIsAbsolute() {
+        assert fileSystem.isAbsolute("/")
+        assert fileSystem.isAbsolute("/abc")
+
+        assert !fileSystem.isAbsolute("abc")
+        assert !fileSystem.isAbsolute("c:\\usr")
+
+        shouldFailWithMessageContaining("path") { fileSystem.isAbsolute(null) }
+    }
+
+    //-----------------------------------------------------------------------------------
+    // Helper Methods
+    //-----------------------------------------------------------------------------------
+
+    /**
+     * Return a new instance of the FileSystem implementation class under test
+     * @return a new FileSystem instance
+     */
+    protected FileSystem createFileSystem() {
+        UnixFakeFileSystem fs = new UnixFakeFileSystem()
+        fs.add(new DirectoryEntry(EXISTING_DIR))
+        fs.add(new FileEntry(EXISTING_FILE, EXISTING_FILE_CONTENTS))
+        assert fs.createParentDirectoriesAutomatically
+        fs.createParentDirectoriesAutomatically = false
+        return fs
+    }
+
+    protected Class getExpectedDirectoryListingFormatterClass() {
+        return UnixDirectoryListingFormatter
+    }
+
+}