public void TestReplaceEnvUnchanged()
{
Assert.AreEqual("Test", Config.ReplaceEnvironmentVariables("Test", true),
"Changed string with no variables.");
Assert.IsNull(Config.ReplaceEnvironmentVariables(null, true),
"Null input, non-null output.");
Assert.AreEqual("Testing %NOT_A_REAL_VAR% Testing",
Config.ReplaceEnvironmentVariables("Testing %NOT_A_REAL_VAR% Testing", true),
"Changed string with fake variable.");
}