Move TextClassificationManagerTest to coretests

/*

 * Copyright (C) 2017 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 android.view.textclassifier;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertThat;

import static org.mockito.Mockito.mock;

import android.os.LocaleList;

import android.support.test.InstrumentationRegistry;

import android.support.test.filters.SmallTest;

import android.support.test.runner.AndroidJUnit4;

import android.view.textclassifier.TextClassificationManager;

import android.view.textclassifier.TextClassificationResult;

import android.view.textclassifier.TextClassifier;

import android.view.textclassifier.TextLanguage;

import android.view.textclassifier.TextSelection;

import org.hamcrest.BaseMatcher;

import org.hamcrest.Description;

import org.hamcrest.Matcher;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import java.util.List;

import java.util.Locale;

@SmallTest

@RunWith(AndroidJUnit4.class)

public class TextClassificationManagerTest {

    private static final LocaleList LOCALES = LocaleList.forLanguageTags("en");

    private TextClassificationManager mTcm;

    private TextClassifier mClassifier;

    @Before

    public void setup() {

        mTcm = InstrumentationRegistry.getTargetContext()

                .getSystemService(TextClassificationManager.class);

        mTcm.setTextClassifier(null);

        mClassifier = mTcm.getTextClassifier();

    }

    @Test

    public void testSmartSelection() {

        if (isTextClassifierDisabled()) return;

        String text = "Contact me at droid@android.com";

        String selected = "droid";

        String suggested = "droid@android.com";

        int startIndex = text.indexOf(selected);

        int endIndex = startIndex + selected.length();

        int smartStartIndex = text.indexOf(suggested);

        int smartEndIndex = smartStartIndex + suggested.length();

        assertThat(mClassifier.suggestSelection(text, startIndex, endIndex, LOCALES),

                isTextSelection(smartStartIndex, smartEndIndex, TextClassifier.TYPE_EMAIL));

    }

    @Test

    public void testSmartSelection_url() {

        if (isTextClassifierDisabled()) return;

        String text = "Visit http://www.android.com for more information";

        String selected = "http";

        String suggested = "http://www.android.com";

        int startIndex = text.indexOf(selected);

        int endIndex = startIndex + selected.length();

        int smartStartIndex = text.indexOf(suggested);

        int smartEndIndex = smartStartIndex + suggested.length();

        assertThat(mClassifier.suggestSelection(text, startIndex, endIndex, LOCALES),

                isTextSelection(smartStartIndex, smartEndIndex, TextClassifier.TYPE_URL));

    }

    @Test

    public void testTextClassificationResult() {

        if (isTextClassifierDisabled()) return;

        String text = "Contact me at droid@android.com";

        String classifiedText = "droid@android.com";

        int startIndex = text.indexOf(classifiedText);

        int endIndex = startIndex + classifiedText.length();

        assertThat(mClassifier.getTextClassificationResult(text, startIndex, endIndex, LOCALES),

                isTextClassificationResult(classifiedText, TextClassifier.TYPE_EMAIL));

    }

    @Test

    public void testTextClassificationResult_url() {

        if (isTextClassifierDisabled()) return;

        String text = "Visit http://www.android.com for more information";

        String classifiedText = "http://www.android.com";

        int startIndex = text.indexOf(classifiedText);

        int endIndex = startIndex + classifiedText.length();

        assertThat(mClassifier.getTextClassificationResult(text, startIndex, endIndex, LOCALES),

                isTextClassificationResult(classifiedText, TextClassifier.TYPE_URL));

    }

    @Test

    public void testLanguageDetection() {

        if (isTextClassifierDisabled()) return;

        String text = "This is a piece of English text";

        assertThat(mTcm.detectLanguages(text), isDetectedLanguage("en"));

        text = "Das ist ein deutscher Text";

        assertThat(mTcm.detectLanguages(text), isDetectedLanguage("de"));

        text = "これは日本語のテキストです";

        assertThat(mTcm.detectLanguages(text), isDetectedLanguage("ja"));

    }

    @Test

    public void testSetTextClassifier() {

        TextClassifier classifier = mock(TextClassifier.class);

        mTcm.setTextClassifier(classifier);

        assertEquals(classifier, mTcm.getTextClassifier());

    }

    private boolean isTextClassifierDisabled() {

        return mClassifier == TextClassifier.NO_OP;

    }

    private static Matcher<TextSelection> isTextSelection(

            final int startIndex, final int endIndex, final String type) {

        return new BaseMatcher<TextSelection>() {

            @Override

            public boolean matches(Object o) {

                if (o instanceof TextSelection) {

                    TextSelection selection = (TextSelection) o;

                    return startIndex == selection.getSelectionStartIndex()

                            && endIndex == selection.getSelectionEndIndex()

                            && selection.getEntityCount() > 0

                            && type.equals(selection.getEntity(0));

                }

                return false;

            }

            @Override

            public void describeTo(Description description) {

                description.appendValue(

                        String.format("%d, %d, %s", startIndex, endIndex, type));

            }

        };

    }

    private static Matcher<TextClassificationResult> isTextClassificationResult(

            final String text, final String type) {

        return new BaseMatcher<TextClassificationResult>() {

            @Override

            public boolean matches(Object o) {

                if (o instanceof TextClassificationResult) {

                    TextClassificationResult result = (TextClassificationResult) o;

                    return text.equals(result.getText())

                            && result.getEntityCount() > 0

                            && type.equals(result.getEntity(0));

                    // TODO: Include other properties.

                }

                return false;

            }

            @Override

            public void describeTo(Description description) {

                description.appendText("text=").appendValue(text)

                        .appendText(", type=").appendValue(type);

            }

        };

    }

    private static Matcher<List<TextLanguage>> isDetectedLanguage(final String language) {

        return new BaseMatcher<List<TextLanguage>>() {

            @Override

            public boolean matches(Object o) {

                if (o instanceof List) {

                    List languages = (List) o;

                    if (!languages.isEmpty()) {

                        Object o1 = languages.get(0);

                        if (o1 instanceof TextLanguage) {

                            TextLanguage lang = (TextLanguage) o1;

                            return lang.getLanguageCount() > 0

                                    && new Locale(language).getLanguage()

                                            .equals(lang.getLanguage(0).getLanguage());

                        }

                    }

                }

                return false;

            }

            @Override

            public void describeTo(Description description) {

                description.appendValue(String.format("%s", language));

            }

        };

    }

}