diff options
| -rw-r--r-- | tests/stdlib/tstrutils.nim | 101 |
1 files changed, 98 insertions, 3 deletions
diff --git a/tests/stdlib/tstrutils.nim b/tests/stdlib/tstrutils.nim index 637661ba3..68ee5812b 100644 --- a/tests/stdlib/tstrutils.nim +++ b/tests/stdlib/tstrutils.nim @@ -221,6 +221,69 @@ template main() = doAssert "0123456789ABCDEFGH".find({'A'..'C'}, 5, 10) == 10 doAssert "0123456789ABCDEFGH".find({'A'..'C'}, 5, 9) == -1 + block: + const haystack: string = "ABCABABABABCAB" + doAssert haystack.len == 14 + + # only last argument + doAssert haystack.find("ABC") == 0 + doAssert haystack.find("ABC", last=13) == 0 # after the second ABC + doAssert haystack.find("ABC", last=5) == 0 # before the second ABC + + # only start argument + doAssert haystack.find("ABC", start=0) == 0 + doAssert haystack.find("ABC", start=1) == 9 + doAssert haystack.find("ABC", start=9) == 9 + doAssert haystack.find("ABC", start=10) == -1 + + # both start and last arguments + doAssert haystack.find("ABC", start=0, last=14) == 0 + doAssert haystack.find("ABC", start=0, last=13) == 0 + doAssert haystack.find("ABC", start=0, last=12) == 0 + doAssert haystack.find("ABC", start=1, last=13) == 9 + doAssert haystack.find("ABC", start=1, last=12) == 9 + doAssert haystack.find("ABC", start=1, last=11) == 9 + doAssert haystack.find("ABC", start=1, last=10) == -1 + + doAssert "".find("/") == -1 + doAssert "/".find("/") == 0 + doAssert "/".find("//") == -1 + doAssert "///".find("//", start=3) == -1 + + # searching for empty string + doAssert "".find("") == 0 + doAssert "abc".find("") == 0 + doAssert "abc".find("", start=1) == 1 + doAssert "abc".find("", start=2) == 2 + doAssert "abc".find("", start=3) == 3 + doAssert "abc".find("", start=4) == -1 + doAssert "abc".find("", start=400) == -1 + doAssert "abc".find("", start=1, last=3) == 1 + doAssert "abc".find("", start=1, last=2) == 1 + doAssert "abc".find("", start=1, last=1) == 1 + doAssert "abc".find("", start=1, last=0) == 1 + doAssert "abc".find("", start=1, last = -1) == 1 + + # when last <= start, searching for non-empty string + block: + let last: int = -1 + doAssert "abcd".find("ab", start=0, last=last) == -1 + doAssert "abcd".find("ab", start=1, last=last) == -1 + doAssert "abcd".find("bc", start=1, last=last) == -1 + doAssert "abcd".find("bc", start=2, last=last) == -1 + block: + let last: int = 0 + doAssert "abcd".find("ab", start=0, last=last) == 0 + doAssert "abcd".find("ab", start=1, last=last) == -1 + doAssert "abcd".find("bc", start=1, last=last) == 1 + doAssert "abcd".find("bc", start=2, last=last) == -1 + block: + let last: int = 1 + doAssert "abcd".find("ab", start=0, last=last) == 0 + doAssert "abcd".find("ab", start=1, last=last) == -1 + doAssert "abcd".find("bc", start=1, last=last) == -1 + doAssert "abcd".find("bc", start=2, last=last) == -1 + block: # rfind doAssert "0123456789ABCDEFGAH".rfind('A') == 17 doAssert "0123456789ABCDEFGAH".rfind('A', last=13) == 10 @@ -254,11 +317,8 @@ template main() = doAssert haystack.rfind("ABC", start=0) == 9 doAssert haystack.rfind("ABC", start=1) == 9 - doAssert haystack.rfind("ABC", start=2) == 9 doAssert haystack.rfind("ABC", start=9) == 9 doAssert haystack.rfind("ABC", start=10) == -1 - doAssert haystack.rfind("ABC", start=11) == -1 - doAssert haystack.rfind("ABC", start=12) == -1 doAssert haystack.rfind("ABC", start=0, last=13) == 9 doAssert haystack.rfind("ABC", start=0, last=12) == 9 @@ -271,6 +331,41 @@ template main() = doAssert "/".rfind("//") == -1 doAssert "///".rfind("//", start=3) == -1 + # searching for empty string + doAssert "".rfind("") == -1 + doAssert "abc".rfind("") == -1 + doAssert "abc".rfind("", start=1) == -1 + doAssert "abc".rfind("", start=2) == -1 + doAssert "abc".rfind("", start=3) == -1 + doAssert "abc".rfind("", start=4) == -1 + doAssert "abc".rfind("", start=400) == -1 + + doAssert "abc".rfind("", start=1, last=3) == -1 + doAssert "abc".rfind("", start=1, last=2) == -1 + doAssert "abc".rfind("", start=1, last=1) == -1 + doAssert "abc".rfind("", start=1, last=0) == -1 + doAssert "abc".rfind("", start=1, last = -1) == -1 + + # when last <= start, searching for non-empty string + block: + let last: int = -1 + doAssert "abcd".rfind("ab", start=0, last=last) == 0 + doAssert "abcd".rfind("ab", start=1, last=last) == -1 + doAssert "abcd".rfind("bc", start=1, last=last) == 1 + doAssert "abcd".rfind("bc", start=2, last=last) == -1 + block: + let last: int = 0 + doAssert "abcd".rfind("ab", start=0, last=last) == -1 + doAssert "abcd".rfind("ab", start=1, last=last) == -1 + doAssert "abcd".rfind("bc", start=1, last=last) == -1 + doAssert "abcd".rfind("bc", start=2, last=last) == -1 + block: + let last: int = 1 + doAssert "abcd".rfind("ab", start=0, last=last) == 0 + doAssert "abcd".rfind("ab", start=1, last=last) == -1 + doAssert "abcd".rfind("bc", start=1, last=last) == -1 + doAssert "abcd".rfind("bc", start=2, last=last) == -1 + block: # trimZeros var x = "1200" x.trimZeros() |