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/*
* 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 com.google.android.apps.common.testing.ui.espresso;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.android.apps.common.testing.ui.espresso.util.HumanReadables;
import com.google.common.base.Optional;
import com.google.common.collect.Lists;
import android.view.View;
import org.hamcrest.Matcher;
import java.util.List;
/**
* Indicates that a given matcher did not match any elements in the view hierarchy.
* <p>
* Contains details about the matcher and the current view hierarchy to aid in debugging.
* </p>
* <p>
* Since this is usually an unrecoverable error this exception is a runtime exception.
* </p>
* <p>
* References to the view and failing matcher are purposefully not included in the state of this
* object - since it will most likely be created on the UI thread and thrown on the instrumentation
* thread, it would be invalid to touch the view on the instrumentation thread. Also the view
* hierarchy may have changed since exception creation (leading to more confusion).
* </p>
*/
public final class NoMatchingViewException extends RuntimeException implements EspressoException {
private Matcher<? super View> viewMatcher;
private View rootView;
private List<View> adapterViews = Lists.newArrayList();
private boolean includeViewHierarchy = true;
private Optional<String> adapterViewWarning = Optional.<String>absent();
private NoMatchingViewException(String description) {
super(description);
}
private NoMatchingViewException(Builder builder) {
super(getErrorMessage(builder));
this.viewMatcher = builder.viewMatcher;
this.rootView = builder.rootView;
this.adapterViews = builder.adapterViews;
this.adapterViewWarning = builder.adapterViewWarning;
this.includeViewHierarchy = builder.includeViewHierarchy;
}
private static String getErrorMessage(Builder builder) {
String errorMessage = "";
if (builder.includeViewHierarchy) {
String message = String.format("No views in hierarchy found matching: %s",
builder.viewMatcher);
if (builder.adapterViewWarning.isPresent()) {
message = message + builder.adapterViewWarning.get();
}
errorMessage = HumanReadables.getViewHierarchyErrorMessage(builder.rootView,
null /* problemViews */,
message,
null /* problemViewSuffix */);
} else {
errorMessage = String.format("Could not find a view that matches %s" , builder.viewMatcher);
}
return errorMessage;
}
/** Builder for {@link NoMatchingViewException}. */
public static class Builder {
private Matcher<? super View> viewMatcher;
private View rootView;
private List<View> adapterViews = Lists.newArrayList();
private boolean includeViewHierarchy = true;
private Optional<String> adapterViewWarning = Optional.<String>absent();
public Builder from(NoMatchingViewException exception) {
this.viewMatcher = exception.viewMatcher;
this.rootView = exception.rootView;
this.adapterViews = exception.adapterViews;
this.adapterViewWarning = exception.adapterViewWarning;
this.includeViewHierarchy = exception.includeViewHierarchy;
return this;
}
public Builder withViewMatcher(Matcher<? super View> viewMatcher) {
this.viewMatcher = viewMatcher;
return this;
}
public Builder withRootView(View rootView) {
this.rootView = rootView;
return this;
}
public Builder withAdapterViews(List<View> adapterViews) {
this.adapterViews = adapterViews;
return this;
}
public Builder includeViewHierarchy(boolean includeViewHierarchy) {
this.includeViewHierarchy = includeViewHierarchy;
return this;
}
public Builder withAdapterViewWarning(Optional<String> adapterViewWarning) {
this.adapterViewWarning = adapterViewWarning;
return this;
}
public NoMatchingViewException build() {
checkNotNull(viewMatcher);
checkNotNull(rootView);
checkNotNull(adapterViews);
checkNotNull(adapterViewWarning);
return new NoMatchingViewException(this);
}
}
}
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