Files
wren/test/core/string/index_of.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("abcd".indexOf("")) // expect: 0
System.print("abcd".indexOf("cd")) // expect: 2
System.print("abcd".indexOf("a")) // expect: 0
System.print("abcd".indexOf("abcd")) // expect: 0
System.print("abcd".indexOf("abcde")) // expect: -1
System.print("abab".indexOf("ab")) // expect: 0
// More complex cases.
System.print("abcdefabcdefg".indexOf("defg")) // expect: 9
System.print("abcdabcdabcd".indexOf("dab")) // expect: 3
System.print("abcdabcdabcdabcd".indexOf("dabcdabc")) // expect: 3
System.print("abcdefg".indexOf("abcdef!")) // expect: -1
// Non-ASCII. Note that it returns byte indices, not code points.
System.print("søméஃthîng".indexOf("e")) // expect: -1
System.print("søméஃthîng".indexOf("m")) // expect: 3
System.print("søméஃthîng".indexOf("thî")) // expect: 9
// 8-bit clean.
System.print("a\0b\0c".indexOf("\0")) // expect: 1
System.print("a\0b\0c".indexOf("a")) // expect: 0
System.print("a\0b\0c".indexOf("b\0c")) // expect: 2
System.print("a\0b\0c".indexOf("a\0b\0c\0d")) // expect: -1
System.print("a\0b\0a\0b".indexOf("a\0b")) // expect: 0