#![cfg(not(feature = "no_module"))]
use rhai::{
module_resolvers::StaticModuleResolver, Engine, EvalAltResult, Module, ParseError,
ParseErrorType, Scope, INT,
};
#[test]
fn test_module() {
let mut module = Module::new();
module.set_var("answer", 42 as INT);
assert!(module.contains_var("answer"));
assert_eq!(module.get_var_value::<INT>("answer").unwrap(), 42);
}
#[test]
fn test_module_sub_module() -> Result<(), Box<EvalAltResult>> {
let mut module = Module::new();
let mut sub_module = Module::new();
let mut sub_module2 = Module::new();
sub_module2.set_var("answer", 41 as INT);
let hash_inc = sub_module2.set_fn_1("inc", |x: INT| Ok(x + 1));
sub_module.set_sub_module("universe", sub_module2);
module.set_sub_module("life", sub_module);
assert!(module.contains_sub_module("life"));
let m = module.get_sub_module("life").unwrap();
assert!(m.contains_sub_module("universe"));
let m2 = m.get_sub_module("universe").unwrap();
assert!(m2.contains_var("answer"));
assert!(m2.contains_fn(hash_inc));
assert_eq!(m2.get_var_value::<INT>("answer").unwrap(), 41);
let mut resolver = StaticModuleResolver::new();
resolver.insert("question", module);
let mut engine = Engine::new();
engine.set_module_resolver(Some(resolver));
let mut scope = Scope::new();
assert_eq!(
engine.eval_with_scope::<INT>(
&mut scope,
r#"import "question" as q; q::life::universe::answer + 1"#
)?,
42
);
assert_eq!(
engine.eval_with_scope::<INT>(
&mut scope,
r#"import "question" as q; q::life::universe::inc(q::life::universe::answer)"#
)?,
42
);
Ok(())
}
#[test]
fn test_module_resolver() -> Result<(), Box<EvalAltResult>> {
let mut resolver = StaticModuleResolver::new();
let mut module = Module::new();
module.set_var("answer", 42 as INT);
module.set_fn_4("sum".to_string(), |x: INT, y: INT, z: INT, w: INT| {
Ok(x + y + z + w)
});
resolver.insert("hello", module);
let mut engine = Engine::new();
engine.set_module_resolver(Some(resolver));
assert_eq!(
engine.eval::<INT>(
r#"
import "hello" as h1;
import "hello" as h2;
h1::sum(h2::answer, -10, 3, 7)
"#
)?,
42
);
#[cfg(not(feature = "unchecked"))]
{
engine.set_max_modules(5);
assert!(matches!(
*engine
.eval::<INT>(
r#"
let sum = 0;
for x in range(0, 10) {
import "hello" as h;
sum += h::answer;
}
sum
"#
)
.expect_err("should error"),
EvalAltResult::ErrorTooManyModules(_)
));
#[cfg(not(feature = "no_function"))]
assert!(matches!(
*engine
.eval::<INT>(
r#"
let sum = 0;
fn foo() {
import "hello" as h;
sum += h::answer;
}
for x in range(0, 10) {
foo();
}
sum
"#
)
.expect_err("should error"),
EvalAltResult::ErrorInFunctionCall(fn_name, _, _) if fn_name == "foo"
));
engine.set_max_modules(1000);
#[cfg(not(feature = "no_function"))]
engine.eval::<()>(
r#"
fn foo() {
import "hello" as h;
}
for x in range(0, 10) {
foo();
}
"#,
)?;
}
Ok(())
}
#[test]
#[cfg(not(feature = "no_function"))]
fn test_module_from_ast() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
let mut resolver1 = StaticModuleResolver::new();
let mut sub_module = Module::new();
sub_module.set_var("foo", true);
resolver1.insert("another module", sub_module);
let ast = engine.compile(
r#"
// Functions become module functions
fn calc(x) {
x + 1
}
fn add_len(x, y) {
x + len(y)
}
private fn hidden() {
throw "you shouldn't see me!";
}
// Imported modules become sub-modules
import "another module" as extra;
// Variables defined at global level become module variables
const x = 123;
let foo = 41;
let hello;
// Final variable values become constant module variable values
foo = calc(foo);
hello = "hello, " + foo + " worlds!";
export
x as abc,
foo,
hello;
"#,
)?;
engine.set_module_resolver(Some(resolver1));
let module = Module::eval_ast_as_new(Scope::new(), &ast, &engine)?;
let mut resolver2 = StaticModuleResolver::new();
resolver2.insert("testing", module);
engine.set_module_resolver(Some(resolver2));
let mut scope = Scope::new();
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, r#"import "testing" as ttt; ttt::abc"#)?,
123
);
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, r#"import "testing" as ttt; ttt::foo"#)?,
42
);
assert!(engine
.eval_with_scope::<bool>(&mut scope, r#"import "testing" as ttt; ttt::extra::foo"#)?);
assert_eq!(
engine.eval_with_scope::<String>(&mut scope, r#"import "testing" as ttt; ttt::hello"#)?,
"hello, 42 worlds!"
);
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, r#"import "testing" as ttt; ttt::calc(999)"#)?,
1000
);
assert_eq!(
engine.eval_with_scope::<INT>(
&mut scope,
r#"import "testing" as ttt; ttt::add_len(ttt::foo, ttt::hello)"#
)?,
59
);
assert!(matches!(
*engine
.eval_with_scope::<()>(&mut scope, r#"import "testing" as ttt; ttt::hidden()"#)
.expect_err("should error"),
EvalAltResult::ErrorFunctionNotFound(fn_name, _) if fn_name == "ttt::hidden"
));
Ok(())
}
#[test]
fn test_module_export() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert!(matches!(
engine.compile(r"let x = 10; { export x; }").expect_err("should error"),
ParseError(x, _) if *x == ParseErrorType::WrongExport
));
#[cfg(not(feature = "no_function"))]
assert!(matches!(
engine.compile(r"fn abc(x) { export x; }").expect_err("should error"),
ParseError(x, _) if *x == ParseErrorType::WrongExport
));
Ok(())
}