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add string-string tests for find and rfind (#18137)

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* add string-string tests for find and rfind

* remove duplicate test cases

* remove more redundant test cases
This commit is contained in:
n5m
2021-06-02 14:19:30 +00:00
committed by GitHub
parent 6768f507fb
commit 4ee6eddad4
1 changed files with 98 additions and 3 deletions
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101
tests/stdlib/tstrutils.nim
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@@ -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()