public void GetandSetExtensionTest()
{
FileNode file0 = new FileNode(fileName, fileID, modifiedTime, createdTime, executeTime, "", filePath);
FileNode file = new FileNode(fileName, fileID, modifiedTime, createdTime, executeTime, extension, filePath);
//test get empty string
String actualExtension0 = file0.GetExtension();
Assert.AreEqual("", actualExtension0, "Actual file extension is not an empty string");
//test get non-empty string
String actualExtension1 = file.GetExtension();
Assert.AreEqual(".txt", actualExtension1, "Actual file extension does not equal to .txt");
//test set empty string
file.SetExtension("");
String actualExtension2 = file.GetExtension();
Assert.AreEqual("", actualExtension2, "Set empty string extension was not successful");
//test set non-empty string
file.SetExtension(".pdf");
String actualExtension3 = file.GetExtension();
Assert.AreEqual(".pdf", actualExtension3, "Set non-empty string extension was not successful");
}
