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Add some tests for exceptions

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This commit is contained in:
Alex Crichton
2017-12-18 14:44:09 -08:00
parent 6593b5ef69
commit 62808e8d99
5 changed files with 115 additions and 46 deletions
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30
crates/wasm-bindgen-cli-support/src/js.rs
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@ -6,6 +6,7 @@ pub struct Js {
pub expose_global_exports: bool,
pub expose_get_string_from_wasm: bool,
pub expose_pass_string_to_wasm: bool,
pub expose_assert_num: bool,
pub expose_token: bool,
pub exports: Vec<(String, String)>,
pub classes: Vec<String>,
@ -24,17 +25,6 @@ impl Js {
}
pub fn generate_free_function(&mut self, func: &shared::Function) {
let simple = func.arguments.iter().all(|t| t.is_number()) &&
func.ret.as_ref().map(|t| t.is_number()).unwrap_or(true);
if simple {
self.exports.push((
func.name.clone(),
format!("obj.instance.exports.{}", func.name),
));
return
}
let ret = self.generate_function(&format!("function {}", func.name),
&func.name,
false,
@ -118,7 +108,11 @@ impl Js {
passed_args.push_str(arg);
};
match *arg {
shared::Type::Number => pass(&name),
shared::Type::Number => {
self.expose_assert_num = true;
arg_conversions.push_str(&format!("_assertNum({});\n", name));
pass(&name)
}
shared::Type::BorrowedStr |
shared::Type::String => {
self.expose_global_exports = true;
@ -207,15 +201,25 @@ impl Js {
globals.push_str("\
const token = Symbol('foo');
function _checkToken(sym) {
if (token != sym)
if (token !== sym)
throw new Error('cannot invoke `new` directly');
}
");
}
if self.expose_assert_num {
globals.push_str("\
function _assertNum(n) {
if (typeof(n) !== 'number')
throw new Error('expected a number argument');
}
");
}
if self.expose_pass_string_to_wasm {
if self.nodejs {
globals.push_str("
function passStringToWasm(arg) {
if (typeof(n) !== 'string')
throw new Error('expected a string argument');
const buf = Buffer.from(arg);
const len = buf.length;
const ptr = exports.__wbindgen_malloc(len);