Basically I am trying to test that after login incorrectly I have an error showing in the email field.
The view is:
<android.support.design.widget.TextInputLayout
android:id="@+id/ti_email"
android:paddingEnd="10dp"
android:paddingTop="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingStart="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/et_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/authentication_email_placeholder"
android:inputType="textEmailAddress"
android:maxLines="1"
android:textSize="16sp"
tools:text="@string/placeholder_email"/>
</android.support.design.widget.TextInputLayout>
I try to do it like this:
onView(withId(R.id.et_email))
.check(matches(hasErrorText(
ctx.getString(R.string.authentication_error_empty_email))));
If you don't want to use a custom matcher, in Kotlin you can get the same result by
val expectedString = ctx.getString(R.string.authentication_error_empty_email)
onView(ViewMatchers.withId(R.id.ti_email))
.check { view, _ ->
val actualError = (view as TextInputLayout).error
assertEquals(actualError, expectedError)
}
}
I like this way best because it allows flexibility with any view
This works with a CustomMatcher:
public static Matcher<View> hasTextInputLayoutErrorText(final String expectedErrorText) {
return new TypeSafeMatcher<View>() {
@Override
public boolean matchesSafely(View view) {
if (!(view instanceof TextInputLayout)) {
return false;
}
CharSequence error = ((TextInputLayout) view).getError();
if (error == null) {
return false;
}
String hint = error.toString();
return expectedErrorText.equals(hint);
}
@Override
public void describeTo(Description description) {
}
};
}
You could write a Custom Matcher:
public final class CustomItemMatchers {
private static class TextInputLayoutErrorMatcher extends BoundedMatcher<Object, Wrapper> {
private final Matcher<String> itemTextMatcher;
public TextInputLayoutErrorMatcher(final Matcher<String> itemTextMatcher){
super(TextInputLayout.class);
this.itemTextMatcher = itemTextMatcher;
}
@Override
public void describeTo(Description description) {
description.appendText("with error content: ");
itemTextMatcher.describeTo(description);
}
@Override
protected boolean matchesSafely(TextInputLayout til) {
if (til == null) {
return false;
}
return itemTextMatcher.matches((til.getError());
}
}
public static Matcher<Object> withErrorName(final Matcher<String> itemTextMatcher) {
checkNotNull(itemTextMatcher);
return new TextInputLayoutErrorMatcher(itemTextMatcher);
}
}
You can use it then with
matches(CustomItemMatchers.withErrorName(equalTo("My Error")))
This code was written with Espresso 1, but I hope it still works.
I think that you would like to set error on TextInputLayout not on EditText. If it is correct, in the following way you could achieve this.
onView(withId(R.id.ti_email)).check(matches(hasDescendant(
withText(ctx.getString(R.string.authentication_error_empty_email))))
)
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