115 lines
2.3 KiB
V
115 lines
2.3 KiB
V
import strings
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type MyInt = int
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const maxn = 100000
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fn test_sb() {
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mut sb := strings.new_builder(100)
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sb.write_string('hi')
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sb.write_string('!')
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sb.write_string('hello')
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assert sb.len == 8
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sb_end := sb.str()
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assert sb_end == 'hi!hello'
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assert sb.len == 0
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///
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sb = strings.new_builder(10)
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sb.write_string('a')
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sb.write_string('b')
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assert sb.len == 2
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assert sb.str() == 'ab'
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// Test interpolation optimization
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sb = strings.new_builder(10)
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x := 10
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y := MyInt(20)
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sb.writeln('x = $x y = $y')
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res := sb.str()
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assert res[res.len - 1] == `\n`
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println('"$res"')
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assert res.trim_space() == 'x = 10 y = 20'
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//
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sb = strings.new_builder(10)
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sb.write_string('x = $x y = $y')
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assert sb.str() == 'x = 10 y = 20'
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//$if !windows {
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sb = strings.new_builder(10)
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sb.write_string('123456')
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last_2 := sb.cut_last(2)
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assert last_2 == '56'
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final_sb := sb.str()
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assert final_sb == '1234'
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//}
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}
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fn test_big_sb() {
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mut sb := strings.new_builder(100)
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mut sb2 := strings.new_builder(10000)
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for i in 0 .. maxn {
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sb.writeln(i.str())
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sb2.write_string('+')
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}
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s := sb.str()
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lines := s.split_into_lines()
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assert lines.len == maxn
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assert lines[0] == '0'
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assert lines[1] == '1'
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assert lines[777] == '777'
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assert lines[98765] == '98765'
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println(sb2.len)
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assert sb2.len == maxn
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}
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fn test_byte_write() {
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mut sb := strings.new_builder(100)
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temp_str := 'byte testing'
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mut count := 0
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for word in temp_str {
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sb.write_b(word)
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count++
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assert count == sb.len
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}
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sb_final := sb.str()
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assert sb_final == temp_str
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}
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fn test_strings_builder_reuse() {
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mut sb := strings.new_builder(256)
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sb.write_string('world')
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assert sb.str() == 'world'
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sb.write_string('hello')
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assert sb.str() == 'hello'
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}
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fn test_cut_to() {
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mut sb := strings.new_builder(16)
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sb.write_string('hello')
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assert sb.cut_to(3) == 'lo'
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assert sb.len == 3
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assert sb.cut_to(3) == ''
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assert sb.len == 3
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assert sb.cut_to(0) == 'hel'
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assert sb.cut_to(32) == ''
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assert sb.len == 0
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}
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fn test_write_rune() {
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mut sb := strings.new_builder(10)
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sb.write_rune(`h`)
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sb.write_rune(`e`)
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sb.write_rune(`l`)
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sb.write_rune(`l`)
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sb.write_rune(`o`)
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x := sb.str()
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assert x == 'hello'
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}
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fn test_write_runes() {
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mut sb := strings.new_builder(20)
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sb.write_runes([`h`, `e`, `l`, `l`, `o`])
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sb.write_rune(` `)
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sb.write_runes([`w`, `o`, `r`, `l`, `d`])
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x := sb.str()
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assert x == 'hello world'
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}
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