fix tests }:3

runtime/src/main.rs

@@ -31,13 +31,19 @@ fn get_config () -> Config {
     cfg
 }
 
+fn link_primitives (linker : &mut Linker<u32>) -> wasmtime::Result<()> {
+    linker.func_wrap ("gyehoek", "write", gyehoek::write)?;
+    linker.func_wrap ("gyehoek", "to-bool", gyehoek::truthy_p)?;
+    Ok (())
+}
+
 pub fn main () -> wasmtime::Result<()> {
     let args = Args::parse ();
     let wasm_config = get_config ();
     let engine = Engine::new (&wasm_config)?;
     let module = Module::new (&engine, read (args.wasm)?)?;
     let mut linker = Linker::new (&engine);
-    linker.func_wrap ("gyehoek", "write", gyehoek::write)?;
+    link_primitives (&mut linker)?;
     let mut store : Store<u32> = Store::new (&engine, 4);
     let instance = linker.instantiate (&mut store, &module)?;
     let main = instance.get_typed_func::<(),()> (&mut store, "main")?;