webidl: add bool const test

crates/webidl/tests/all/consts.rs

@@ -1 +1,44 @@
 use super::project;
+
+#[test]
+fn bool() {
+    project()
+        .file(
+            "foo.webidl",
+            r#"
+                interface Foo {
+                    const boolean not_true = false;
+                    const boolean not_false = true;
+                };
+            "#,
+        )
+        // a corresponding const in the js implementation is not required
+        // value is taken directly from idl
+        .file(
+            "foo.js",
+            r#"
+                export class Foo {
+                }
+            "#,
+        )
+        .file(
+            "src/lib.rs",
+            r#"
+                #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+                extern crate wasm_bindgen;
+                use wasm_bindgen::prelude::*;
+
+                pub mod foo;
+                use foo::Foo;
+
+                #[wasm_bindgen]
+                pub fn test() {
+                    let falsish: bool = Foo::NOT_TRUE;
+                    assert!(!falsish);
+                    let trueish: bool = Foo::NOT_FALSE;
+                    assert!(trueish);
+                }
+            "#,
+        )
+        .test();
+}