Export GRAPHQL_MAX_INT and GRAPHQL_MIN_INT (#3355)

Author: tofran

src/index.ts

@@ -51,6 +51,9 @@ export {
   GraphQLString,
   GraphQLBoolean,
   GraphQLID,
+  /** Int boundaries constants */
+  GRAPHQL_MAX_INT,
+  GRAPHQL_MIN_INT,
   /** Built-in Directives defined by the Spec */
   specifiedDirectives,
   GraphQLIncludeDirective,

src/type/index.ts

@@ -151,6 +151,9 @@ export {
   GraphQLString,
   GraphQLBoolean,
   GraphQLID,
+  /** Int boundaries constants */
+  GRAPHQL_MAX_INT,
+  GRAPHQL_MIN_INT,
 } from './scalars';
 
 export {

src/type/scalars.ts

@@ -9,13 +9,17 @@ import { GraphQLError } from '../error/GraphQLError';
 import type { GraphQLNamedType } from './definition';
 import { GraphQLScalarType } from './definition';
 
-// As per the GraphQL Spec, Integers are only treated as valid when a valid
-// 32-bit signed integer, providing the broadest support across platforms.
-//
-// n.b. JavaScript's integers are safe between -(2^53 - 1) and 2^53 - 1 because
-// they are internally represented as IEEE 754 doubles.
-const MAX_INT = 2147483647;
-const MIN_INT = -2147483648;
+/**
+ * Maximum possible Int value as per GraphQL Spec (32-bit signed integer).
+ * n.b. This differs from JavaScript's numbers that are IEEE 754 doubles safe up-to 2^53 - 1
+ * */
+export const GRAPHQL_MAX_INT = 2147483647;
+
+/**
+ * Minimum possible Int value as per GraphQL Spec (32-bit signed integer).
+ * n.b. This differs from JavaScript's numbers that are IEEE 754 doubles safe starting at -(2^53 - 1)
+ * */
+export const GRAPHQL_MIN_INT = -2147483648;
 
 export const GraphQLInt = new GraphQLScalarType<number>({
   name: 'Int',
@@ -39,7 +43,7 @@ export const GraphQLInt = new GraphQLScalarType<number>({
         `Int cannot represent non-integer value: ${inspect(coercedValue)}`,
       );
     }
-    if (num > MAX_INT || num < MIN_INT) {
+    if (num > GRAPHQL_MAX_INT || num < GRAPHQL_MIN_INT) {
       throw new GraphQLError(
         'Int cannot represent non 32-bit signed integer value: ' +
           inspect(coercedValue),
@@ -54,7 +58,7 @@ export const GraphQLInt = new GraphQLScalarType<number>({
         `Int cannot represent non-integer value: ${inspect(inputValue)}`,
       );
     }
-    if (inputValue > MAX_INT || inputValue < MIN_INT) {
+    if (inputValue > GRAPHQL_MAX_INT || inputValue < GRAPHQL_MIN_INT) {
       throw new GraphQLError(
         `Int cannot represent non 32-bit signed integer value: ${inputValue}`,
       );
@@ -70,7 +74,7 @@ export const GraphQLInt = new GraphQLScalarType<number>({
       );
     }
     const num = parseInt(valueNode.value, 10);
-    if (num > MAX_INT || num < MIN_INT) {
+    if (num > GRAPHQL_MAX_INT || num < GRAPHQL_MIN_INT) {
       throw new GraphQLError(
         `Int cannot represent non 32-bit signed integer value: ${valueNode.value}`,
         valueNode,