STREAMS-1895: Add old shell compatibility of NumberLong for JS Engine

Author: LijieZhang1998

snippets/mongocompat/mongotypes.js

@@ -378,10 +378,53 @@ if (!NumberLong.prototype) {
     NumberLong.prototype = {};
 }
 
+NumberLong.prototype.nativeToString = NumberLong.prototype.toString;
+NumberLong.prototype.toString = function () {
+    return `NumberLong(${this.nativeToString()})`;
+};
+
 NumberLong.prototype.tojson = function() {
     return this.toString();
 };
 
+Object.defineProperty(NumberLong.prototype, 'floatApprox', {
+    enumerable: false,
+    configurable: true,
+    get: function() {
+        return Number(this.nativeToString());
+    }
+});
+
+Object.defineProperty(NumberLong.prototype, 'top', {
+    enumerable: false,
+    configurable: true,
+    get: function() {
+        const str = this.nativeToString();
+        const bigIntValue = BigInt(str);
+        const unsigned64 = bigIntValue < 0n 
+            ? bigIntValue + (1n << 64n)
+            : bigIntValue;
+        return Number((unsigned64 >> 32n) & 0xFFFFFFFFn);
+    }
+});
+
+Object.defineProperty(NumberLong.prototype, 'bottom', {
+    enumerable: false,
+    configurable: true,
+    get: function() {
+        const str = this.nativeToString();
+        const bigIntValue = BigInt(str);
+        const unsigned64 = bigIntValue < 0n 
+            ? bigIntValue + (1n << 64n)
+            : bigIntValue;
+        return Number(unsigned64 & 0xFFFFFFFFn);
+    }
+});
+
+NumberLong.prototype.exactValueString = function() {
+    return this.nativeToString();
+};
+
 // NumberInt
 if (!NumberInt.prototype) {
     NumberInt.prototype = {};

snippets/mongocompat/test.js

@@ -1,4 +1,14 @@
 load(__dirname + '/index.js');
 
 assert.strictEqual(ObjectId('0123456789abcdef01234567').tojson(), 'ObjectId("0123456789abcdef01234567")');
+
 assert.strictEqual(BinData(4, 'abcdefgh').toString(), 'BinData(4,"abcdefgh")');
+
+assert.strictEqual(NumberLong(1234567890).toString(), 'NumberLong(1234567890)');
+const nl1 = NumberLong(9.223372036854776e+18, 2147483647, 4294967295);
+assert.strictEqual(nl1.floatApprox, 9223372036854776000);
+assert.strictEqual(nl1.top, 2147483647);
+assert.strictEqual(nl1.bottom, 4294967295);
+assert.strictEqual(nl1.exactValueString(), "9223372036854775807");
+const nl2 = NumberLong("200");
+assert.strictEqual(nl1.compare(nl2), 1);