How to use espresso to press a AlertDialog button

According to StackOverflow similar issue: Check if a dialog is displayed with Espresso

You should change your code from:

onView(withText("GA NAAR INSTELLINGEN")).perform(click());

to

onView(withText("GA NAAR INSTELLINGEN")))    .inRoot(isDialog()) // <---    .check(matches(isDisplayed()))    .perform(click());

If it won't work, don't bother to use long with Espresso another great Google's instrumentation test called uiatomator.

Check: http://qathread.blogspot.com/2015/05/espresso-uiautomator-perfect-tandem.html

Example code:

// Initialize UiDevice instanceUiDevice uiDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());// Search for correct button in the dialog.UiObject button = uiDevice.findObject(new UiSelector().text("GA NAAR INSTELLINGEN"));if (button.exists() && button.isEnabled()) {    button.click();}

Hope it will help

Since inRoot(isDialog()) does not seem to work for DialogFragment I use this workaround so far:

enum class AlertDialogButton(@IdRes val resId: Int) {    POSITIVE(android.R.id.button1),    NEGATIVE(android.R.id.button2),    NEUTRAL(android.R.id.button3)}fun clickOnButtonInAlertDialog(button: AlertDialogButton) {    onView(withId(button.resId)).perform(click())}

You might need to close the softkeyboard like this:

        onView(withId(R.id.username))                .perform(typeText("username"))                .perform(closeSoftKeyboard())        onView(withId(android.R.id.button1)).perform((click()))

As detailed more thoroughly by this answer.