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|
// Named str to avoid name collisions with the Erlang string module.
// Will rename later once we have namespaces for modules.
import expect
import iodata
import list
pub external fn length(String) -> Int = "string" "length"
pub enum ParseError =
| ParseError
test length {
length("ß↑e̊")
|> expect:equal(_, 3)
length("Gleam")
|> expect:equal(_, 5)
length("")
|> expect:equal(_, 0)
}
pub external fn lowercase(String) -> String = "string" "lowercase"
test lowercase {
lowercase("Gleam")
|> expect:equal(_, "gleam")
}
pub external fn uppercase(String) -> String = "string" "uppercase"
test uppercase {
uppercase("Gleam")
|> expect:equal(_, "GLEAM")
}
pub fn reverse(string) {
string
|> iodata:new
|> iodata:reverse
|> iodata:to_string
}
test reverse {
reverse("Gleam")
|> expect:equal(_, "maelG")
}
pub fn split(string, on) {
string
|> iodata:new
|> iodata:split(_, on)
|> list:map(_, iodata:to_string)
}
test split {
"Gleam,Erlang,Elixir"
|> split(_, ",")
|> expect:equal(_, ["Gleam", "Erlang", "Elixir"])
"Gleam, Erlang,Elixir"
|> split(_, ", ")
|> expect:equal(_, ["Gleam", "Erlang,Elixir"])
}
pub fn replace(string, pattern, with) {
string
|> iodata:new
|> iodata:replace(_, pattern, with)
|> iodata:to_string
}
test replace {
"Gleam,Erlang,Elixir"
|> replace(_, ",", "++")
|> expect:equal(_, "Gleam++Erlang++Elixir")
}
pub external fn from_int(Int) -> String = "erlang" "integer_to_binary"
test from_int {
123
|> from_int
|> expect:equal(_, "123")
-123
|> from_int
|> expect:equal(_, "-123")
0123
|> from_int
|> expect:equal(_, "123")
}
pub external fn parse_int(String) -> Result(Int, ParseError) = "gleam__stdlib" "parse_int";
test parse_int {
"123"
|> parse_int
|> expect:equal(_, Ok(123))
"-123"
|> parse_int
|> expect:equal(_, Ok(-123))
"0123"
|> parse_int
|> expect:equal(_, Ok(123))
""
|> parse_int
|> expect:equal(_, Error(ParseError))
"what"
|> parse_int
|> expect:equal(_, Error(ParseError))
"1.23"
|> parse_int
|> expect:equal(_, Error(ParseError))
}
pub external fn base_from_int(Int, Int) -> String = "erlang" "integer_to_binary"
test base_from_int {
100
|> base_from_int(_, 16)
|> expect:equal(_, "64")
-100
|> base_from_int(_, 16)
|> expect:equal(_, "-64")
}
pub fn from_float(f) {
f
|> iodata:from_float
|> iodata:to_string
}
test from_float {
123.0
|> from_float
|> expect:equal(_, "123.0")
-8.1
|> from_float
|> expect:equal(_, "-8.1")
}
|
