LayoutMatchers.java
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.test.espresso.matcher;
import android.text.Layout;
import android.view.View;
import android.widget.TextView;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
/** A collection of hamcrest matches to detect typical layout issues. */
public final class LayoutMatchers {
private LayoutMatchers() {}
/**
* Matches TextView elements having ellipsized text. If text is too long to fit into a TextView,
* it can be either ellipsized ('Too long' shown as 'Too l…' or '… long') or cut off ('Too long'
* shown as 'Too l'). Though acceptable in some cases, usually indicates bad user experience.
*/
public static Matcher<View> hasEllipsizedText() {
return new TypeSafeMatcher<View>(TextView.class) {
@Override
public void describeTo(Description description) {
description.appendText("has ellipsized text");
}
@Override
public boolean matchesSafely(View tv) {
Layout layout = ((TextView) tv).getLayout();
if (layout != null) {
int lines = layout.getLineCount();
return lines > 0 && layout.getEllipsisCount(lines - 1) > 0;
}
return false;
}
};
}
/** Matches TextView elements having multiline text. */
public static Matcher<View> hasMultilineText() {
return new TypeSafeMatcher<View>(TextView.class) {
@Override
public void describeTo(Description description) {
description.appendText("has more than one line of text");
}
@Override
public boolean matchesSafely(View tv) {
return ((TextView) tv).getLineCount() > 1;
}
};
}
}