Clears the mapping of environment variables.
Clears the mapping of system properties.
Returns the specified environment variable if it exists.
Returns the specified environment variable if it exists.
Returns the system line separator.
Returns the system line separator.
Returns the specified system property if it exists.
Returns the specified system property if it exists.
Adds the specified name and value to the mapping of environment
variables maintained by this MockSystem.
Adds the specified name and value to the mapping of system properties
maintained by this MockSystem.
Sets the system line separator maintained by this MockSystem to the
specified value.