Add utility function for mocked tests that listens for ipc calls

The new function is quite similar to `mockIpcHandle` but instead of
handling the incoming call, it just returns that it happened along with
the provided argument.

1 files changed, 20 insertions, 0 deletions

diff --git a/desktop/packages/mullvad-vpn/test/e2e/mocked/mocked-utils.ts b/desktop/packages/mullvad-vpn/test/e2e/mocked/mocked-utils.ts
index 171cc1cc50..808321a254 100644
--- a/desktop/packages/mullvad-vpn/test/e2e/mocked/mocked-utils.ts
+++ b/desktop/packages/mullvad-vpn/test/e2e/mocked/mocked-utils.ts
@@ -13,6 +13,7 @@ interface StartMockedAppResponse extends Awaited<ReturnType<typeof startApp>> {
 export interface MockedTestUtils extends TestUtils {
   mockIpcHandle: MockIpcHandle;
   sendMockIpcResponse: SendMockIpcResponse;
+  expectIpcCall: ExpectIpcCall;
 }
 
 export const startMockedApp = async (): Promise<StartMockedAppResponse> => {
@@ -27,6 +28,7 @@ export const startMockedApp = async (): Promise<StartMockedAppResponse> => {
   const startAppResult = await startApp({ args });
   const mockIpcHandle = generateMockIpcHandle(startAppResult.app);
   const sendMockIpcResponse = generateSendMockIpcResponse(startAppResult.app);
+  const expectIpcCall = generateExpectIpcCall(startAppResult.app);
 
   return {
     ...startAppResult,
@@ -34,6 +36,7 @@ export const startMockedApp = async (): Promise<StartMockedAppResponse> => {
       ...startAppResult.util,
       mockIpcHandle,
       sendMockIpcResponse,
+      expectIpcCall,
     },
   };
 };
@@ -83,3 +86,20 @@ export const generateSendMockIpcResponse = (electronApp: ElectronApplication) =>
     );
   };
 };
+
+export type ExpectIpcCall = ReturnType<typeof generateExpectIpcCall>;
+
+export const generateExpectIpcCall = (electronApp: ElectronApplication) => {
+  return <T>(channel: string): Promise<T> => {
+    return electronApp.evaluate(
+      ({ ipcMain }, { channel }) => {
+        return new Promise<T>((resolve) => {
+          ipcMain.handleOnce(channel, (_event, arg) => {
+            resolve(arg);
+          });
+        });
+      },
+      { channel },
+    );
+  };
+};