Added 4 tests for Rails Runner. 2 failing tests for $0 and $PROGRAM_NAME [#2244 state:open]
Added 4 tests for Rails Runner. 2 failing tests for $0 and $PROGRAM_NAME [#2244 state:open]

Signed-off-by: José Valim <0c2436ea76ed86e37cc05f66dea18d48ef390882@gmail.com>

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