test: get lib/wasi.js coverage to 100%

This commit covers the last remaining uncovered code in lib/wasi.js. PR-URL: #31039 Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Yongsheng Zhang <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Stephen Belanger <[email protected]>

Author: cjihrig

test/wasi/test-wasi-options-validation.js

@@ -20,3 +20,9 @@ assert.throws(() =>{new WASI({env: 'fhqwhgads'})},
 // If preopens is not an Object and not undefined, it should throw.
 assert.throws(()=>{newWASI({preopens: 'fhqwhgads'});},
 {code: 'ERR_INVALID_ARG_TYPE',message: /\bpreopens\b/});
+
+// If options is provided, but not an object, the constructor should throw.
+[null,'foo','',0,NaN,Symbol(),true,false,()=>{}].forEach((value)=>{
+assert.throws(()=>{newWASI(value);},
+{code: 'ERR_INVALID_ARG_TYPE'});
+});