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Forked from smuldr/EditTextMatchers.java
Created February 10, 2016 12:05
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Espresso: Match EditText error text
package smuldr.espresso.util;
import android.content.res.Resources;
import android.support.test.espresso.matcher.BoundedMatcher;
import android.view.View;
import android.widget.EditText;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.Matchers;
public final class EditTextMatchers {
private EditTextMatchers() {
// do not instantiate
}
public static Matcher<View> withErrorText(final String text) {
return withErrorText(Matchers.is(text));
}
/**
* Returns a matcher that matches {@link android.widget.EditText}s based on text property value.
*
* @param stringMatcher {@link Matcher} of {@link String} with text to match
*/
public static Matcher<View> withErrorText(final Matcher<String> stringMatcher) {
return new BoundedMatcher<View, EditText>(EditText.class) {
@Override
public void describeTo(Description description) {
description.appendText("with error text: ");
stringMatcher.describeTo(description);
}
@Override
protected boolean matchesSafely(EditText view) {
if (view.getError() == null) return stringMatcher.matches(view.getError());
return stringMatcher.matches(view.getError().toString());
}
};
}
/**
* Returns a matcher that matches a descendant of {@link android.widget.EditText} that is displaying the error
* string associated with the given resource id.
*
* @param resourceId the string resource the text view is expected to hold.
*/
public static Matcher<View> withErrorText(final int resourceId) {
return new BoundedMatcher<View, EditText>(EditText.class) {
private String resourceName = null;
private String expectedText = null;
@Override
public void describeTo(Description description) {
description.appendText("with error text from resource id: ");
description.appendValue(resourceId);
if (null != resourceName) {
description.appendText("[");
description.appendText(resourceName);
description.appendText("]");
}
if (null != expectedText) {
description.appendText(" value: ");
description.appendText(expectedText);
}
}
@Override
public boolean matchesSafely(EditText editText) {
if (null == expectedText) {
try {
expectedText = editText.getResources().getString(resourceId);
resourceName = editText.getResources().getResourceEntryName(resourceId);
} catch (Resources.NotFoundException ignored) {
// view could be from a context unaware of the resource id
}
}
return null != expectedText && expectedText.equals(editText.getError());
}
};
}
}
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