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switch.rs
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use rhai::{Engine, ParseErrorType, Scope, INT};
#[test]
fn test_switch() {
let engine = Engine::new();
let mut scope = Scope::new();
scope.push("x", 42 as INT);
assert_eq!(engine.eval::<char>("switch 2 { 1 => (), 2 => 'a', 42 => true }").unwrap(), 'a');
engine.run("switch 3 { 1 => (), 2 => 'a', 42 => true }").unwrap();
assert_eq!(engine.eval::<INT>("switch 3 { 1 => (), 2 => 'a', 42 => true, _ => 123 }").unwrap(), 123);
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch 2 { 1 => (), 2 if x < 40 => 'a', 42 => true, _ => 123 }").unwrap(), 123);
assert_eq!(engine.eval_with_scope::<char>(&mut scope, "switch 2 { 1 => (), 2 if x > 40 => 'a', 42 => true, _ => 123 }").unwrap(), 'a');
assert!(engine.eval_with_scope::<bool>(&mut scope, "switch x { 1 => (), 2 => 'a', 42 => true }").unwrap());
assert!(engine.eval_with_scope::<bool>(&mut scope, "switch x { 1 => (), 2 => 'a', _ => true }").unwrap());
let _: () = engine.eval_with_scope::<()>(&mut scope, "switch x { 1 => 123, 2 => 'a' }").unwrap();
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch x { 1 | 2 | 3 | 5..50 | 'x' | true => 123, 'z' => 'a' }").unwrap(), 123);
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch x { 424242 => 123, _ => 42 }").unwrap(), 42);
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch x { 1 => 123, 42 => { x / 2 }, _ => 999 }").unwrap(), 21);
#[cfg(not(feature = "no_index"))]
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
let y = [1, 2, 3];
switch y {
42 => 1,
true => 2,
[1, 2, 3] => 3,
_ => 9
}
"
)
.unwrap(),
3
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
let y = #{a:1, b:true, c:'x'};
switch y {
42 => 1,
true => 2,
#{b:true, c:'x', a:1} => 3,
_ => 9
}
"
)
.unwrap(),
3
);
assert_eq!(engine.eval::<bool>("let x = 1..42; switch x { 1 => (), 2 => 'a', 1..42 => true }").unwrap(), true);
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch 42 { 42 => 123, 42 => 999 }").unwrap(), 123);
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "switch x { 42 => 123, 42 => 999 }").unwrap(), 123);
}
#[test]
fn test_switch_errors() {
let engine = Engine::new();
assert!(matches!(engine.compile("switch x { _ => 123, 1 => 42 }").unwrap_err().err_type(), ParseErrorType::WrongSwitchDefaultCase));
}
#[test]
fn test_switch_condition() {
let engine = Engine::new();
let mut scope = Scope::new();
scope.push("x", 42 as INT);
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
switch x / 2 {
21 if x > 40 => 1,
0 if x < 100 => 2,
1 => 3,
_ => 9
}
"
)
.unwrap(),
1
);
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
switch x / 2 {
21 if x < 40 => 1,
0 if x < 100 => 2,
1 => 3,
_ => 9
}
"
)
.unwrap(),
9
);
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
switch x {
42 if x < 40 => 1,
42 if x > 40 => 7,
0 if x < 100 => 2,
1 => 3,
42 if x == 10 => 10,
_ => 9
}
"
)
.unwrap(),
7
);
assert!(matches!(engine.compile("switch x { 1 => 123, _ if true => 42 }").unwrap_err().err_type(), ParseErrorType::WrongSwitchCaseCondition));
}
#[cfg(not(feature = "no_index"))]
#[cfg(not(feature = "no_object"))]
mod test_switch_enum {
use super::*;
use rhai::Array;
#[derive(Debug, Clone)]
#[allow(dead_code)]
enum MyEnum {
Foo,
Bar(INT),
Baz(String, bool),
}
impl MyEnum {
fn get_enum_data(&mut self) -> Array {
match self {
Self::Foo => vec!["Foo".into()] as Array,
Self::Bar(num) => vec!["Bar".into(), (*num).into()] as Array,
Self::Baz(name, option) => vec!["Baz".into(), name.clone().into(), (*option).into()] as Array,
}
}
}
#[test]
fn test_switch_enum() {
let mut engine = Engine::new();
engine.register_type_with_name::<MyEnum>("MyEnum").register_get("get_data", MyEnum::get_enum_data);
let mut scope = Scope::new();
scope.push("x", MyEnum::Baz("hello".to_string(), true));
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
r#"
switch x.get_data {
["Foo"] => 1,
["Bar", 42] => 2,
["Bar", 123] => 3,
["Baz", "hello", false] => 4,
["Baz", "hello", true] => 5,
_ => 9
}
"#
)
.unwrap(),
5
);
}
}
#[test]
fn test_switch_ranges() {
let engine = Engine::new();
let mut scope = Scope::new();
scope.push("x", 42 as INT);
assert_eq!(
engine
.eval_with_scope::<char>(&mut scope, "switch x { 10..20 => (), 20..=42 => 'a', 25..45 => 'z', 30..100 => true }")
.unwrap(),
'a'
);
assert_eq!(
engine
.eval_with_scope::<char>(&mut scope, "switch x { 10..20 => (), 20..=42 if x < 40 => 'a', 25..45 => 'z', 30..100 => true }")
.unwrap(),
'z'
);
assert_eq!(
engine
.eval_with_scope::<char>(&mut scope, "switch x { 42 => 'x', 10..20 => (), 20..=42 => 'a', 25..45 => 'z', 30..100 => true, 'w' => true }")
.unwrap(),
'x'
);
assert!(matches!(
engine
.compile("switch x { 10..20 => (), 20..=42 => 'a', 25..45 => 'z', 42 => 'x', 30..100 => true }")
.unwrap_err()
.err_type(),
ParseErrorType::WrongSwitchIntegerCase
));
#[cfg(not(feature = "no_float"))]
assert!(matches!(
engine
.compile("switch x { 10..20 => (), 20..=42 => 'a', 25..45 => 'z', 42.0 => 'x', 30..100 => true }")
.unwrap_err()
.err_type(),
ParseErrorType::WrongSwitchIntegerCase
));
assert_eq!(
engine
.eval_with_scope::<char>(
&mut scope,
"
switch 5 {
'a' => true,
0..10 if x+2==1+2 => print(40+2),
_ => 'x'
}
"
)
.unwrap(),
'x'
);
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
switch 5 {
'a' => true,
0..10 => 123,
2..12 => 'z',
_ => 'x'
}
"
)
.unwrap(),
123
);
assert_eq!(
engine
.eval_with_scope::<INT>(
&mut scope,
"
switch 5 {
'a' => true,
4 | 5 | 6 => 42,
0..10 => 123,
2..12 => 'z',
_ => 'x'
}
"
)
.unwrap(),
42
);
assert_eq!(
engine
.eval_with_scope::<char>(
&mut scope,
"
switch 5 {
'a' => true,
2..12 => 'z',
0..10 if x+2==1+2 => print(40+2),
_ => 'x'
}
"
)
.unwrap(),
'z'
);
assert_eq!(
engine
.eval_with_scope::<char>(
&mut scope,
"
switch 5 {
'a' => true,
0..10 if x+2==1+2 => print(40+2),
2..12 => 'z',
_ => 'x'
}
"
)
.unwrap(),
'z'
);
}