Add tests

Author: Nols1000

src/utilities/__tests__/getIntrospectionQuery-test.ts

@@ -176,4 +176,10 @@ describe('getIntrospectionQuery', () => {
       .toNotContain('directives(includeDeprecated: true) {')
       .toMatch('deprecationReason', 2);
   });
+
+  it('throw error if typeDepth is too high', () => {
+    expect(() => getIntrospectionQuery({ typeDepth: 101 })).to.throw(
+      'Please set typeDepth to a reasonable value between 0 and 100; the default is 9.',
+    );
+  });
 });

src/utilities/getIntrospectionQuery.ts

@@ -96,7 +96,9 @@ export function getIntrospectionQuery(options?: IntrospectionOptions): string {
       return '';
     }
     if (level > 100) {
-      throw new Error('Please set typeDepth to a reasonable value; the default is 9.');
+      throw new Error(
+        'Please set typeDepth to a reasonable value between 0 and 100; the default is 9.',
+      );
     }
     return `
 ${indent}ofType {