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wren/test/core/string/contains.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("".contains("")) // expect: true
System.print("anything".contains("")) // expect: true
System.print("something".contains("meth")) // expect: true
System.print("something".contains("some")) // expect: true
System.print("something".contains("ing")) // expect: true
System.print("something".contains("math")) // expect: false
// Non-ASCII.
System.print("søméthîng".contains("méth")) // expect: true
System.print("søméthîng".contains("meth")) // expect: false
// 8-bit clean.
System.print("a\0b\0c".contains("\0")) // expect: true
System.print("a\0b\0c".contains("b")) // expect: true
System.print("a\0b\0c".contains("b\0c")) // expect: true
System.print("a\0b\0c".contains("bc")) // expect: false