Provide failing test for #9448

src/react/hooks/__tests__/useLazyQuery.test.tsx

@@ -1483,6 +1483,78 @@ describe("useLazyQuery Hook", () => {
     expect(fetchCount).toBe(1);
   });
 
+  // https://github.com/apollographql/apollo-client/issues/9448
+  it("does not issue multiple network calls when calling function again without variables", async () => {
+    interface Data {
+      user: { id: string; name: string };
+    }
+
+    interface Variables {
+      id?: string;
+    }
+
+    const query: TypedDocumentNode<Data, Variables> = gql`
+      query UserQuery($id: ID) {
+        user(id: $id) {
+          id
+          name
+        }
+      }
+    `;
+
+    let fetchCount = 0;
+
+    const link = new ApolloLink((operation) => {
+      fetchCount++;
+      return new Observable((observer) => {
+        setTimeout(() => {
+          observer.next({
+            data: {
+              user: { id: operation.variables.id || null, name: "John Doe" },
+            },
+          });
+          observer.complete();
+        }, 20);
+      });
+    });
+
+    const client = new ApolloClient({
+      link,
+      cache: new InMemoryCache(),
+      defaultOptions: { watchQuery: { fetchPolicy: "no-cache" } },
+    });
+
+    const { result } = renderHook(() => useLazyQuery(query), {
+      wrapper: ({ children }) => (
+        <ApolloProvider client={client}>{children}</ApolloProvider>
+      ),
+    });
+
+    const [execute] = result.current;
+
+    await act(() => execute({ variables: { id: "2" } }));
+
+    expect(fetchCount).toBe(1);
+
+    await waitFor(() => {
+      expect(result.current[1].data).toEqual({
+        user: { id: "2", name: "John Doe" },
+      });
+    });
+
+    expect(fetchCount).toBe(1);
+
+    await act(() => execute());
+
+    await waitFor(() => {
+      expect(result.current[1].data).toEqual({
+        user: { id: null, name: "John Doe" },
+      });
+    });
+
+    expect(fetchCount).toBe(2);
+  });
+
   describe("network errors", () => {
     async function check(errorPolicy: ErrorPolicy) {
       const networkError = new Error("from the network");