chore: add toBits validation

Author: nbbeeken

src/binary.ts

@@ -415,6 +415,8 @@ export class Binary extends BSONValue {
       throw new BSONError('Binary datatype field is not packed bit');
     }
 
+    validateBinaryVector(this);
+
     const byteCount = this.length() - 2;
     const bitCount = byteCount * 8 - this.buffer[1];
     const bits = new Int8Array(bitCount);

test/node/bson_binary_vector.spec.test.ts

@@ -185,6 +185,22 @@ function testVectorInvalidBSONBytes(test: VectorTest, expectedErrorMessage: stri
       expect(thrownError?.message).to.match(new RegExp(expectedErrorMessage));
     });
 
+    if (toHelper === 'toPackedBits') {
+      it(`Binary.toBits() throw a BSONError`, function () {
+        let thrownError: Error | undefined;
+        const bin = BSON.deserialize(Buffer.from(test.canonical_bson!, 'hex'));
+
+        try {
+          bin.vector.toBits();
+        } catch (error) {
+          thrownError = error;
+        }
+
+        expect(thrownError, thrownError?.stack).to.be.instanceOf(BSONError);
+        expect(thrownError?.message).to.match(new RegExp(expectedErrorMessage));
+      });
+    }
+
     it(`EJSON.stringify() throw a BSONError`, function () {
       let thrownError: Error | undefined;
       const bin = BSON.deserialize(Buffer.from(test.canonical_bson!, 'hex'));