confirm the save worked

contracts/MIPSMemory.sol

@@ -18,6 +18,12 @@ contract MIPSMemory {
 
   mapping(bytes32 => Preimage) public preimage;
 
+  function GetPreimage(bytes32 outhash, uint offset) public view returns (uint, uint32) {
+    uint64 data = preimage[outhash].data[offset];
+    require(data > 0, "offset not loaded");
+    return (preimage[outhash].length, uint32(data));
+  }
+
   function AddPreimage(bytes calldata anything, uint offset) public {
     require(offset & 3 == 0, "offset must be 32-bit aligned");
     uint len = anything.length;

test/libkeccak.js

@@ -40,12 +40,16 @@ describe("MIPSMemory contract", function () {
     await mm.AddLargePreimageInit(4)
 
     let dat = new TextEncoder("utf-8").encode("hello world")
+    let dathash = keccak256(dat)
     const tst = await mm.AddLargePreimageFinal(dat)
-    expect(tst[0]).to.equal(keccak256(dat))
+    expect(tst[0]).to.equal(dathash)
     expect(tst[1].toNumber()).to.equal(11)
     expect(tst[2]).to.equal(0x6f20776f)
-    console.log(tst)
 
     await mm.AddLargePreimageFinalSaved(dat)
+
+    let ret = await mm.GetPreimage(dathash, 4)
+    expect(ret[0].toNumber()).to.equal(11)
+    expect(ret[1]).to.equal(0x6f20776f)
   })
 });
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