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v/vlib/builtin/string_test.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
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fn test_add() {
mut a := 'a'
a += 'b'
assert a==('ab')
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a = 'a'
for i := 1; i < 1000; i++ {
a += 'b'
}
assert a.len == 1000
assert a.ends_with('bbbbb')
a += '123'
assert a.ends_with('3')
}
fn test_ends_with() {
a := 'browser.v'
assert a.ends_with('.v')
}
fn test_between() {
s := 'hello [man] how you doing'
assert s.find_between('[', ']') == 'man'
}
fn test_compare() {
a := 'Music'
b := 'src'
assert b>=(a)
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}
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fn test_lt() {
a := ''
b := 'a'
c := 'a'
d := 'b'
e := 'aa'
f := 'ab'
assert a<(b)
assert !(b<c)
assert c<(d)
assert !(d<e)
assert c<(e)
assert e<(f)
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}
fn test_ge() {
a := 'aa'
b := 'aa'
c := 'ab'
d := 'abc'
e := 'aaa'
assert b>=(a)
assert c>=(b)
assert d>=(c)
assert !(c>=d)
assert e>=(a)
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}
fn test_compare_strings() {
a := 'aa'
b := 'aa'
c := 'ab'
d := 'abc'
e := 'aaa'
assert compare_strings(a, b) == 0
assert compare_strings(b, c) == -1
assert compare_strings(c, d) == -1
assert compare_strings(d, e) == 1
assert compare_strings(a, e) == -1
assert compare_strings(e, a) == 1
}
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fn test_sort() {
mut vals := [
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'arr', 'an', 'a', 'any'
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]
len := vals.len
vals.sort()
assert len == vals.len
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assert vals[0] == 'a'
assert vals[1] == 'an'
assert vals[2] == 'any'
assert vals[3] == 'arr'
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}
fn test_split() {
mut s := 'volt/twitch.v:34'
mut vals := s.split(':')
assert vals.len == 2
assert vals[0]== 'volt/twitch.v'
assert vals[1]== '34'
// /////////
s = '2018-01-01z13:01:02'
vals = s.split('z')
assert vals.len == 2
assert vals[0]=='2018-01-01'
assert vals[1]== '13:01:02'
// /////////////
s = '4627a862c3dec29fb3182a06b8965e0025759e18___1530207969___blue'
vals = s.split('___')
assert vals.len == 3
assert vals[0]== '4627a862c3dec29fb3182a06b8965e0025759e18'
assert vals[1]=='1530207969'
assert vals[2]== 'blue'
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// /////////
s = 'lalala'
vals = s.split('a')
assert vals.len == 3
assert vals[0] == 'l'
assert vals[1] == 'l'
assert vals[2] == 'l'
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}
fn test_trim_space() {
a := ' a '
assert a.trim_space() == 'a'
code := '
fn main() {
println(2)
}
'
code_clean := 'fn main() {
println(2)
}'
assert code.trim_space() == code_clean
}
fn test_join() {
mut strings := [ 'a', 'b', 'c' ]
mut s := strings.join(' ')
assert s == 'a b c'
strings = ['one
two ',
'three!
four!']
s = strings.join(' ')
assert s.contains('one') && s.contains('two ') && s.contains('four')
}
fn test_clone() {
mut a := 'a'
a += 'a'
a += 'a'
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b := a
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c := a.clone()
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assert c == a
assert c == 'aaa'
assert b == 'aaa'
}
fn test_replace() {
a := 'hello man!'
mut b := a.replace('man', 'world')
assert b==('hello world!')
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b = b.replace('!', '')
assert b==('hello world')
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b = b.replace('h', 'H')
assert b==('Hello world')
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b = b.replace('foo', 'bar')
assert b==('Hello world')
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s := 'hey man how are you'
assert s.replace('man ', '') == 'hey how are you'
lol := 'lol lol lol'
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assert lol.replace('lol', 'LOL') == 'LOL LOL LOL'
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b = 'oneBtwoBBthree'
assert b.replace('B', '') == 'onetwothree'
b = '**char'
assert b.replace('*char', 'byteptr') == '*byteptr'
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mut c :='abc'
assert c.replace('','-') == c
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}
fn test_itoa() {
num := 777
assert num.str() == '777'
big := 7779998
assert big.str() == '7779998'
a := 3
assert a.str() == '3'
b := 5555
assert b.str() == '5555'
zero := 0
assert zero.str() == '0'
neg := -7
assert neg.str() == '-7'
}
fn test_reassign() {
a := 'hi'
mut b := a
b += '!'
assert a == 'hi'
assert b == 'hi!'
}
fn test_runes() {
s := 'привет'
assert s.len == 12
s2 := 'privet'
assert s2.len == 6
u := s.ustring()
assert u.len == 6
assert s2.substr(1, 4).len == 3
assert s2.substr(1, 4) == 'riv'
assert u.substr(1, 4).len == 6
assert u.substr(1, 4) == 'рив'
assert s2.substr(1, 2) == 'r'
assert u.substr(1, 2) == 'р'
assert s2.ustring().at(1) == 'r'
assert u.at(1) == 'р'
// ///////
first := u.at(0)
last := u.at(u.len - 1)
assert first.len == 2
assert last.len == 2
}
fn test_lower() {
mut s := 'A'
assert s.to_lower() == 'a'
assert s.to_lower().len == 1
s = 'HELLO'
assert s.to_lower() == 'hello'
assert s.to_lower().len == 5
s = 'Aloha'
assert s.to_lower() == 'aloha'
s = 'Have A nice Day!'
assert s.to_lower() == 'have a nice day!'
s = 'hi'
assert s.to_lower() == 'hi'
}
fn test_left_right() {
s := 'ALOHA'
assert s.left(3) == 'ALO'
assert s.right(3) == 'HA'
u := s.ustring()
assert u.left(3) == 'ALO'
assert u.right(3) == 'HA'
}
fn test_contains() {
s := 'view.v'
assert s.contains('vi')
assert !s.contains('random')
}
fn test_arr_contains() {
a := ['a', 'b', 'c']
assert a.contains('b')
ints := [1, 2, 3]
assert ints.contains(2)
}
fn test_to_num() {
s := '7'
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assert s.int() == 7
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f := '71.5 hasdf'
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assert f.f32() == 71.5
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b := 1.52345
mut a := '${b:.03f}'
assert a == '1.523'
num := 7
a = '${num:03d}'
vals := ['9']
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assert vals[0].int() == 9
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}
fn test_hash() {
s := '10000'
assert s.hash() == 46730161
s2 := '24640'
assert s2.hash() == 47778736
s3 := 'Content-Type'
assert s3.hash() == 949037134
s4 := 'bad_key'
assert s4.hash() == -346636507
s5 := '24640'
// From a map collision test
assert s5.hash() % ((1 << 20) -1) == s.hash() % ((1 << 20) -1)
assert s5.hash() % ((1 << 20) -1) == 592861
}
fn test_trim_left() {
mut s := 'module main'
assert s.trim_left(' ') == 'module main'
s = ' module main'
assert s.trim_left(' ') == 'module main'
}
fn test_all_after() {
s := 'fn hello'
q := s.all_after('fn ')
assert q == 'hello'
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}
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fn test_reverse() {
s := 'hello'
assert s.reverse() == 'olleh'
t := ''
assert t.reverse() == t
}
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struct Foo {
bar int
}
fn (f Foo) baz() string {
return 'baz'
}
fn test_interpolation() {
num := 7
mut s := 'number=$num'
assert s == 'number=7'
foo := Foo{}
s = 'baz=${foo.baz()}'
assert s == 'baz=baz'
}
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fn test_bytes_to_string() {
mut buf := malloc(10)
buf[0] = `h`
buf[1] = `e`
buf[2] = `l`
buf[3] = `l`
buf[4] = `o`
assert string(buf) == 'hello'
assert string(buf, 2) == 'he'
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bytes := [`h`, `e`, `l`, `l`, `o`]
assert string(bytes) == 'hello'
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}