convert values to float64 for comparison

Author: zhouselena

internal/integration/unified/matches.go

@@ -251,10 +251,22 @@ func evaluateSpecialComparison(ctx context.Context, assertionDoc bson.Raw, actua
 
 		// Numeric values can be compared even if their types are different (e.g. if expected is an int32 and actual
 		// is an int64).
-		expectedInt64 := assertionVal.AsInt64()
-		actualInt64 := actual.AsInt64()
-		if actualInt64 > expectedInt64 {
-			return fmt.Errorf("expected numeric value %d to be less than or equal %d", actualInt64, expectedInt64)
+		var expectedF64 float64
+		if assertionVal.Type == bson.TypeDouble {
+			expectedF64 = assertionVal.Double()
+		} else {
+			expectedF64 = float64(assertionVal.AsInt64())
+		}
+
+		var actualF64 float64
+		if actual.Type == bson.TypeDouble {
+			actualF64 = actual.Double()
+		} else {
+			actualF64 = float64(actual.AsInt64())
+		}
+
+		if actualF64 > expectedF64 {
+			return fmt.Errorf("expected numeric value %f to be less than or equal %f", actualF64, expectedF64)
 		}
 		return nil
 	case "$$matchAsDocument":