fix coverage

Author: yaacovCR

src/execution/__tests__/variables-test.ts

@@ -888,6 +888,23 @@ describe('Execute: Handles inputs', () => {
       });
     });
 
+    it('allows custom scalars with non-embedded variables', () => {
+      const result = executeQuery(
+        `
+          query ($input: JSONScalar) {
+            fieldWithJSONScalarInput(input: $input)
+          }
+        `,
+        { input: { a: 'foo', b: ['bar'], c: 'baz' } },
+      );
+
+      expectJSON(result).toDeepEqual({
+        data: {
+          fieldWithJSONScalarInput: '{ a: "foo", b: ["bar"], c: "baz" }',
+        },
+      });
+    });
+
     it('allows custom scalars with embedded operation variables', () => {
       const result = executeQuery(
         `