Files
wren/test/core/string/equality.wren
Bob Nystrom 58e4d26648 "IO" -> "System".
Get rid of the separate opt-in IO class and replace it with a core
System class.

- Remove wren_io.c, wren_io.h, and io.wren.
- Remove the flags that disable it.
- Remove the overloads for print() with different arity. (It was an
  experiment, but I don't think it's that useful.)
- Remove IO.read(). That will reappear using libuv in the CLI at some
  point.
- Remove IO.time. Doesn't seem to have been used.
- Update all of the tests, docs, etc.

I'm sorry for all the breakage this causes, but I think "System" is a
better name for this class (it makes it natural to add things like
"System.gc()") and frees up "IO" for referring to the CLI's IO module.
2015-09-15 07:46:09 -07:00

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System.print("" == "") // expect: true
System.print("abcd" == "abcd") // expect: true
System.print("abcd" == "d") // expect: false
System.print("e" == "abcd") // expect: false
System.print("" == "abcd") // expect: false
// Not equal to other types.
System.print("1" == 1) // expect: false
System.print("true" == true) // expect: false
System.print("" != "") // expect: false
System.print("abcd" != "abcd") // expect: false
System.print("abcd" != "d") // expect: true
System.print("e" != "abcd") // expect: true
System.print("" != "abcd") // expect: true
// Not equal to other types.
System.print("1" != 1) // expect: true
System.print("true" != true) // expect: true
// Non-ASCII.
System.print("vålue" == "value") // expect: false
System.print("vålue" == "vålue") // expect: true
// 8-bit clean.
System.print("a\0b\0c" == "a") // expect: false
System.print("a\0b\0c" == "abc") // expect: false
System.print("a\0b\0c" == "a\0b\0c") // expect: true