Add test

test_ffi/src/lib.rs

@@ -404,3 +404,10 @@ pub struct Structure {
 
 #[no_mangle]
 pub static mut static_ptr: Structure = Structure { _data: 42 };
+
+/// Invalid UTF-8 characters, array of length 14
+#[no_mangle]
+pub static static_char: [u8; 14] = [
+ 0xC0, 0xC1, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
+ 0x00,
+];

test_ffi/tests/test.js

@@ -3,6 +3,7 @@
 
 // Run using cargo test or `--v8-options=--allow-natives-syntax`
 
+import { assertEquals } from "https://deno.land/[email protected]/testing/asserts.ts";
 import {
  assertThrows,
 } from "../../test_util/std/testing/asserts.ts";
@@ -186,6 +187,12 @@ const dylib = Deno.dlopen(libPath, {
  "static_ptr": {
  type: "pointer",
  },
+ /**
+ * Invalid UTF-8 characters, buffer of length 14
+ */
+ "static_char": {
+ type: "pointer",
+ },
 });
 const { symbols } = dylib;
 
@@ -465,6 +472,19 @@ uint32Array[0] = 55; // MUTATES!
 console.log("uint32Array[0] after mutation:", uint32Array[0]);
 console.log("Static ptr value after mutation:", view.getUint32());
 
+// Test non-UTF-8 characters
+
+const charView = new Deno.UnsafePointerView(dylib.symbols.static_char);
+
+const charArrayBuffer = charView.getArrayBuffer(14);
+const uint8Array = new Uint8Array(charArrayBuffer);
+assertEquals([...uint8Array], [
+ 0xC0, 0xC1, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
+ 0x00
+]);
+
+assertThrows(() => charView.getCString(), TypeError, "Invalid CString pointer, not valid UTF-8");
+
 (function cleanup() {
  dylib.close();
  throwCallback.close();