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|
use fasteval::ez_eval;
#[test]
fn empty() {
let mut ns = fasteval::EmptyNamespace;
let val = ez_eval("1 + 1", &mut ns).unwrap();
assert_eq!(val, 2.0);
}
#[test]
fn str_to_f64() {
{
let mut ns = fasteval::StringToF64Namespace::new();
ns.insert("a".to_string(), 1.11);
ns.insert("b".to_string(), 2.22);
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
{
let mut ns = fasteval::StrToF64Namespace::new();
ns.insert("a", 1.11);
ns.insert("b", 2.22);
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
}
#[test]
fn str_to_cb() {
{
let mut ns = fasteval::StringToCallbackNamespace::new();
ns.insert("a".to_string(), Box::new(|args| args[0]));
ns.insert("b".to_string(), Box::new(|args| args[0] * 2.0));
let val = ez_eval("a(1.11) + b(1.11) + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
{
let mut ns = fasteval::StrToCallbackNamespace::new();
ns.insert("a", Box::new(|args| args[0]));
ns.insert("b", Box::new(|args| args[0] * 2.0));
let val = ez_eval("a(1.11) + b(1.11) + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
}
#[test]
fn layered_str_to_f64() {
let mut ns = fasteval::LayeredStringToF64Namespace::new();
let mut layer0 = fasteval::StringToF64Namespace::new();
layer0.insert("a".to_string(), 1.11);
layer0.insert("b".to_string(), 2.22);
ns.push(layer0);
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
let mut layer1 = fasteval::StringToF64Namespace::new();
layer1.insert("a".to_string(), 11.11);
ns.push(layer1);
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 14.33);
ns.pop();
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
#[test]
fn cb() {
let mut ns = |name:&str, args:Vec<f64>| {
match name {
"a" => Some(1.11),
"b" => Some(2.22),
"len" => Some(args.len() as f64),
_ => None,
}
};
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
}
#[test]
fn cached_cb() {
let mut ns = fasteval::CachedCallbackNamespace::new(|name:&str, args:Vec<f64>| {
match name {
"a" => { eprintln!("cached_cb: a: This should only be printed once."); Some(1.11) }
"b" => Some(2.22),
"len" => Some(args.len() as f64),
_ => None,
}
});
let val = ez_eval("a + b + 1", &mut ns).unwrap();
assert_eq!(val, 4.33);
ez_eval("a + b + 1", &mut ns).unwrap();
ez_eval("a + b + 1", &mut ns).unwrap();
ez_eval("a + b + 1", &mut ns).unwrap();
ez_eval("a + b + 1", &mut ns).unwrap();
}
#[test]
fn custom_vector_funcs() {
let vecs_cell = std::cell::RefCell::new(Vec::<Vec<f64>>::new());
let mut ns = fasteval::StrToCallbackNamespace::new();
ns.insert("x", Box::new(|_args| 2.0));
ns.insert("vec_store", Box::new(|args| {
let mut vecs = vecs_cell.borrow_mut();
let index = vecs.len();
vecs.push(args);
index as f64
}));
ns.insert("vec_sum", Box::new(|args| {
if let Some(index) = args.get(0) {
if let Some(v) = vecs_cell.borrow().get(*index as usize) {
return v.iter().sum();
}
}
std::f64::NAN
}));
let val = ez_eval("vec_sum(vec_store(1.1, x, 3.3)) + vec_sum(0)", &mut ns).unwrap();
assert_eq!(val, 12.8);
}
|
