quickjs-tart

quickjs-based runtime for wallet-core logic
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test_prelude.js (603B)

      1 const enc = new TextEncoder();
      2 const dec = new TextDecoder();
      3 
      4 const buf = enc.encode("Hello, World");
      5 
      6 console.log("byteOffset", buf.byteOffset);
      7 console.log("byteLength", buf.byteLength);
      8 
      9 const str = dec.decode(buf);
     10 
     11 if (str != "Hello, World") {
     12   throw Error("test 1 failed");
     13 }
     14 
     15 // Put 4 bytes before and after!
     16 const buf2 = new Uint8Array(buf.byteLength + 8);
     17 
     18 buf2.set(buf, 4);
     19 
     20 buf2[0] = 42;
     21 
     22 console.log(JSON.stringify(dec.decode(buf2.slice(3, buf2.byteLength - 4))))
     23 
     24 const str2 = dec.decode(buf2.slice(4, buf2.byteLength - 4))
     25 if (str2 != "Hello, World") {
     26   throw Error("test 2 failed");
     27 }