use dust_lang::*; #[test] fn function_scope() { assert_eq!( interpret( "test", " x = 2 foo = fn () -> int { x = 42 x } x = 1 foo() " ), Ok(Some(Value::integer(42))) ); } #[test] fn function_call_with_type_argument() { assert_eq!( interpret( "test", " foobar = fn (x: T) -> T { x } foobar::(42) ", ), Ok(Some(Value::integer(42))) ); } #[test] fn function_call() { assert_eq!( interpret( "test", " foobar = fn (message: str) -> str { message } foobar('Hiya') ", ), Ok(Some(Value::string("Hiya".to_string()))) ); } #[test] fn callback() { assert_eq!( interpret( "test", " foobar = fn (cb: fn () -> str) -> str { cb() } foobar(fn () -> str { 'Hiya' }) ", ), Ok(Some(Value::string("Hiya".to_string()))) ); } #[test] fn built_in_function_call() { assert_eq!( interpret("test", "use std.io io.write_line('Hiya')"), Ok(None) ); } #[test] fn function_context_captures_values() { assert_eq!( interpret( "test", " bar = fn () -> int { 2 } foo = fn () -> int { bar() } foo() " ), Ok(Some(Value::integer(2))) ); } #[test] fn recursion() { assert_eq!( interpret( "test", " fib = fn (i: int) -> int { if i < 0 { 0 } else if i <= 1 { i } else { fib(i - 1) + fib(i - 2) } } fib(4) " ), Ok(Some(Value::integer(13))) ); }