fix(amplify-appsync-simulator): parse AWSTimestamp literals as Ints (#…

…6979)

packages/amplify-appsync-simulator/src/__tests__/scalars/AWSTimestamp.test.ts

@@ -0,0 +1,17 @@
+import { ValueNode } from 'graphql';
+import { scalars } from '../../schema/appsync-scalars';
+
+describe('AWSTimestamp parseLiteral', () => {
+  it('Returns literals as integers', () => {
+    const astNode = { kind: 'IntValue', value: '1234', loc: { start: 68, end: 74 } } as ValueNode;
+    expect(scalars.AWSTimestamp.parseLiteral(astNode, null)).toEqual(1234);
+  });
+
+  it('Rejects non-integer literals', () => {
+    const astNode = { kind: 'StringValue', value: '1234', loc: { start: 68, end: 74 } } as ValueNode;
+
+    expect(() => {
+      scalars.AWSTimestamp.parseLiteral(astNode, null);
+    }).toThrow('Can only validate integers but received: StringValue');
+  });
+});

packages/amplify-appsync-simulator/src/schema/appsync-scalars/index.ts

@@ -1,5 +1,5 @@
 import { URL } from 'url';
-import { GraphQLInt, GraphQLScalarType, GraphQLError, Kind, StringValueNode } from 'graphql';
+import { GraphQLInt, GraphQLScalarType, GraphQLError, Kind, StringValueNode, ValueNode } from 'graphql';
 import { isValidNumber } from 'libphonenumber-js';
 
 import { GraphQLDate, GraphQLTime, GraphQLDateTime } from 'graphql-iso-date';
@@ -104,8 +104,12 @@ are also accepted and these represent the number of seconds till 1970-01-01T00:0
   parseValue(value) {
     return GraphQLInt.parseValue(value) ? value : undefined;
   },
-  parseLiteral(value) {
-    return GraphQLInt.parseLiteral(value, null) ? (value as StringValueNode).value : undefined;
+  parseLiteral(value: ValueNode) {
+    if (value.kind !== Kind.INT) {
+      throw new GraphQLError(`Can only validate integers but received: ${value.kind}`);
+    }
+
+    return Number.parseInt(value.value, 10);
   },
 });