/*
 * Copyright (C) 2013 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.android.mediaframeworktest.unit;

import android.os.Parcel;
import android.test.suitebuilder.annotation.SmallTest;
import android.graphics.Point;
import android.graphics.Rect;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CaptureResult;
import android.hardware.camera2.Face;
import android.hardware.camera2.Rational;
import android.hardware.camera2.Size;
import android.hardware.camera2.impl.CameraMetadataNative;

import static android.hardware.camera2.impl.CameraMetadataNative.*;

import java.lang.reflect.Array;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

/**
 * <pre>
 * adb shell am instrument \
 *      -e class 'com.android.mediaframeworktest.unit.CameraMetadataTest' \
 *      -w com.android.mediaframeworktest/.MediaFrameworkUnitTestRunner
 * </pre>
 */
public class CameraMetadataTest extends junit.framework.TestCase {

    CameraMetadataNative mMetadata;
    Parcel mParcel;

    // Sections
    static final int ANDROID_COLOR_CORRECTION = 0;
    static final int ANDROID_CONTROL = 1;

    // Section starts
    static final int ANDROID_COLOR_CORRECTION_START = ANDROID_COLOR_CORRECTION << 16;
    static final int ANDROID_CONTROL_START = ANDROID_CONTROL << 16;

    // Tags
    static final int ANDROID_COLOR_CORRECTION_MODE = ANDROID_COLOR_CORRECTION_START;
    static final int ANDROID_COLOR_CORRECTION_TRANSFORM = ANDROID_COLOR_CORRECTION_START + 1;
    static final int ANDROID_COLOR_CORRECTION_GAINS = ANDROID_COLOR_CORRECTION_START + 2;

    static final int ANDROID_CONTROL_AE_ANTIBANDING_MODE = ANDROID_CONTROL_START;
    static final int ANDROID_CONTROL_AE_EXPOSURE_COMPENSATION = ANDROID_CONTROL_START + 1;

    @Override
    public void setUp() {
        mMetadata = new CameraMetadataNative();
        mParcel = Parcel.obtain();
    }

    @Override
    public void tearDown() throws Exception {
        mMetadata = null;

        mParcel.recycle();
        mParcel = null;
    }

    @SmallTest
    public void testNew() {
        assertEquals(0, mMetadata.getEntryCount());
        assertTrue(mMetadata.isEmpty());
    }

    @SmallTest
    public void testGetTagFromKey() {

        // Test success

        assertEquals(ANDROID_COLOR_CORRECTION_MODE,
                CameraMetadataNative.getTag("android.colorCorrection.mode"));
        assertEquals(ANDROID_COLOR_CORRECTION_TRANSFORM,
                CameraMetadataNative.getTag("android.colorCorrection.transform"));
        assertEquals(ANDROID_CONTROL_AE_ANTIBANDING_MODE,
                CameraMetadataNative.getTag("android.control.aeAntibandingMode"));
        assertEquals(ANDROID_CONTROL_AE_EXPOSURE_COMPENSATION,
                CameraMetadataNative.getTag("android.control.aeExposureCompensation"));

        // Test failures

        try {
            CameraMetadataNative.getTag(null);
            fail("A null key should throw NPE");
        } catch(NullPointerException e) {
        }

        try {
            CameraMetadataNative.getTag("android.control");
            fail("A section name only should not be a valid key");
        } catch(IllegalArgumentException e) {
        }

        try {
            CameraMetadataNative.getTag("android.control.thisTagNameIsFakeAndDoesNotExist");
            fail("A valid section with an invalid tag name should not be a valid key");
        } catch(IllegalArgumentException e) {
        }

        try {
            CameraMetadataNative.getTag("android");
            fail("A namespace name only should not be a valid key");
        } catch(IllegalArgumentException e) {
        }

        try {
            CameraMetadataNative.getTag("this.key.is.definitely.invalid");
            fail("A completely fake key name should not be valid");
        } catch(IllegalArgumentException e) {
        }
    }

    @SmallTest
    public void testGetTypeFromTag() {
        assertEquals(TYPE_BYTE, CameraMetadataNative.getNativeType(ANDROID_COLOR_CORRECTION_MODE));
        assertEquals(TYPE_RATIONAL, CameraMetadataNative.getNativeType(ANDROID_COLOR_CORRECTION_TRANSFORM));
        assertEquals(TYPE_FLOAT, CameraMetadataNative.getNativeType(ANDROID_COLOR_CORRECTION_GAINS));
        assertEquals(TYPE_BYTE, CameraMetadataNative.getNativeType(ANDROID_CONTROL_AE_ANTIBANDING_MODE));
        assertEquals(TYPE_INT32,
                CameraMetadataNative.getNativeType(ANDROID_CONTROL_AE_EXPOSURE_COMPENSATION));

        try {
            CameraMetadataNative.getNativeType(0xDEADF00D);
            fail("No type should exist for invalid tag 0xDEADF00D");
        } catch(IllegalArgumentException e) {
        }
    }

    @SmallTest
    public void testReadWriteValues() {
        final byte ANDROID_COLOR_CORRECTION_MODE_HIGH_QUALITY = 2;
        byte[] valueResult;

        assertEquals(0, mMetadata.getEntryCount());
        assertEquals(true, mMetadata.isEmpty());

        //
        // android.colorCorrection.mode (single enum byte)
        //

        assertEquals(null, mMetadata.readValues(ANDROID_COLOR_CORRECTION_MODE));

        // Write/read null values
        mMetadata.writeValues(ANDROID_COLOR_CORRECTION_MODE, null);
        assertEquals(null, mMetadata.readValues(ANDROID_COLOR_CORRECTION_MODE));

        // Write 0 values
        mMetadata.writeValues(ANDROID_COLOR_CORRECTION_MODE, new byte[] {});

        // Read 0 values
        valueResult = mMetadata.readValues(ANDROID_COLOR_CORRECTION_MODE);
        assertNotNull(valueResult);
        assertEquals(0, valueResult.length);

        assertEquals(1, mMetadata.getEntryCount());
        assertEquals(false, mMetadata.isEmpty());

        // Write 1 value
        mMetadata.writeValues(ANDROID_COLOR_CORRECTION_MODE, new byte[] {
            ANDROID_COLOR_CORRECTION_MODE_HIGH_QUALITY
        });

        // Read 1 value
        valueResult = mMetadata.readValues(ANDROID_COLOR_CORRECTION_MODE);
        assertNotNull(valueResult);
        assertEquals(1, valueResult.length);
        assertEquals(ANDROID_COLOR_CORRECTION_MODE_HIGH_QUALITY, valueResult[0]);

        assertEquals(1, mMetadata.getEntryCount());
        assertEquals(false, mMetadata.isEmpty());

        //
        // android.colorCorrection.colorCorrectionGains (float x 4 array)
        //

        final float[] colorCorrectionGains = new float[] { 1.0f, 2.0f, 3.0f, 4.0f};
        byte[] colorCorrectionGainsAsByteArray = new byte[colorCorrectionGains.length * 4];
        ByteBuffer colorCorrectionGainsByteBuffer =
                ByteBuffer.wrap(colorCorrectionGainsAsByteArray).order(ByteOrder.nativeOrder());
        for (float f : colorCorrectionGains)
            colorCorrectionGainsByteBuffer.putFloat(f);

        // Read
        assertNull(mMetadata.readValues(ANDROID_COLOR_CORRECTION_GAINS));
        mMetadata.writeValues(ANDROID_COLOR_CORRECTION_GAINS, colorCorrectionGainsAsByteArray);

        // Write
        assertArrayEquals(colorCorrectionGainsAsByteArray,
                mMetadata.readValues(ANDROID_COLOR_CORRECTION_GAINS));

        assertEquals(2, mMetadata.getEntryCount());
        assertEquals(false, mMetadata.isEmpty());

        // Erase
        mMetadata.writeValues(ANDROID_COLOR_CORRECTION_GAINS, null);
        assertNull(mMetadata.readValues(ANDROID_COLOR_CORRECTION_GAINS));
        assertEquals(1, mMetadata.getEntryCount());
    }

    private static <T> void assertArrayEquals(T expected, T actual) {
        assertEquals(Array.getLength(expected), Array.getLength(actual));

        int len = Array.getLength(expected);
        for (int i = 0; i < len; ++i) {
            assertEquals(Array.get(expected, i), Array.get(actual, i));
        }
    }

    private <T> void checkKeyGetAndSet(String keyStr, Class<T> type, T value) {
        assertFalse("Use checkKeyGetAndSetArray to compare array Keys", type.isArray());

        Key<T> key = new Key<T>(keyStr, type);
        assertNull(mMetadata.get(key));
        mMetadata.set(key, null);
        assertNull(mMetadata.get(key));
        mMetadata.set(key, value);

        T actual = mMetadata.get(key);
        assertEquals(value, actual);
    }

    private <T> void checkKeyGetAndSetArray(String keyStr, Class<T> type, T value) {
        assertTrue(type.isArray());

        Key<T> key = new Key<T>(keyStr, type);
        assertNull(mMetadata.get(key));
        mMetadata.set(key, value);
        assertArrayEquals(value, mMetadata.get(key));
    }

    @SmallTest
    public void testReadWritePrimitive() {
        // int32 (single)
        checkKeyGetAndSet("android.control.aeExposureCompensation", Integer.TYPE, 0xC0FFEE);

        // byte (single)
        checkKeyGetAndSet("android.flash.maxEnergy", Byte.TYPE, (byte)6);

        // int64 (single)
        checkKeyGetAndSet("android.flash.firingTime", Long.TYPE, 0xABCD12345678FFFFL);

        // float (single)
        checkKeyGetAndSet("android.lens.aperture", Float.TYPE, Float.MAX_VALUE);

        // double (single) -- technically double x 3, but we fake it
        checkKeyGetAndSet("android.jpeg.gpsCoordinates", Double.TYPE, Double.MAX_VALUE);

        // rational (single)
        checkKeyGetAndSet("android.sensor.baseGainFactor", Rational.class, new Rational(1, 2));

        /**
         * Weirder cases, that don't map 1:1 with the native types
         */

        // bool (single) -- with TYPE_BYTE
        checkKeyGetAndSet("android.control.aeLock", Boolean.TYPE, true);

        // integer (single) -- with TYPE_BYTE
        checkKeyGetAndSet("android.control.aePrecaptureTrigger", Integer.TYPE, 6);
    }

    @SmallTest
    public void testReadWritePrimitiveArray() {
        // int32 (n)
        checkKeyGetAndSetArray("android.sensor.info.sensitivityRange", int[].class,
                new int[] {
                        0xC0FFEE, 0xDEADF00D
                });

        // byte (n)
        checkKeyGetAndSetArray("android.statistics.faceScores", byte[].class, new byte[] {
                1, 2, 3, 4
        });

        // int64 (n)
        checkKeyGetAndSetArray("android.scaler.availableProcessedMinDurations", long[].class,
                new long[] {
                        0xABCD12345678FFFFL, 0x1234ABCD5678FFFFL, 0xFFFF12345678ABCDL
                });

        // float (n)
        checkKeyGetAndSetArray("android.lens.info.availableApertures", float[].class,
                new float[] {
                        Float.MAX_VALUE, Float.MIN_NORMAL, Float.MIN_VALUE
                });

        // double (n) -- in particular double x 3
        checkKeyGetAndSetArray("android.jpeg.gpsCoordinates", double[].class,
                new double[] {
                        Double.MAX_VALUE, Double.MIN_NORMAL, Double.MIN_VALUE
                });

        // rational (n) -- in particular rational x 9
        checkKeyGetAndSetArray("android.sensor.calibrationTransform1", Rational[].class,
                new Rational[] {
                        new Rational(1, 2), new Rational(3, 4), new Rational(5, 6),
                        new Rational(7, 8), new Rational(9, 10), new Rational(10, 11),
                        new Rational(12, 13), new Rational(14, 15), new Rational(15, 16)
                });

        /**
         * Weirder cases, that don't map 1:1 with the native types
         */

        // bool (n) -- with TYPE_BYTE
        checkKeyGetAndSetArray("android.control.aeLock", boolean[].class, new boolean[] {
                true, false, true
        });


        // integer (n) -- with TYPE_BYTE
        checkKeyGetAndSetArray("android.control.aeAvailableModes", int[].class, new int[] {
            1, 2, 3, 4
        });
    }

    private enum ColorCorrectionMode {
        TRANSFORM_MATRIX,
        FAST,
        HIGH_QUALITY
    }

    private enum AeAntibandingMode {
        OFF,
        _50HZ,
        _60HZ,
        AUTO
    }

    // TODO: special values for the enum.
    private enum AvailableFormat {
        RAW_SENSOR,
        YV12,
        YCrCb_420_SP,
        IMPLEMENTATION_DEFINED,
        YCbCr_420_888,
        BLOB
    }

    @SmallTest
    public void testReadWriteEnum() {
        // byte (single)
        checkKeyGetAndSet("android.colorCorrection.mode", ColorCorrectionMode.class,
                ColorCorrectionMode.HIGH_QUALITY);

        // byte (single)
        checkKeyGetAndSet("android.control.aeAntibandingMode", AeAntibandingMode.class,
                AeAntibandingMode.AUTO);

        // byte (n)
        checkKeyGetAndSetArray("android.control.aeAvailableAntibandingModes",
                AeAntibandingMode[].class, new AeAntibandingMode[] {
                        AeAntibandingMode.OFF, AeAntibandingMode._50HZ, AeAntibandingMode._60HZ,
                        AeAntibandingMode.AUTO
                });

        /**
         * Stranger cases that don't use byte enums
         */
        // int (n)
        checkKeyGetAndSetArray("android.scaler.availableFormats", AvailableFormat[].class,
                new AvailableFormat[] {
                        AvailableFormat.RAW_SENSOR,
                        AvailableFormat.YV12,
                        AvailableFormat.IMPLEMENTATION_DEFINED,
                        AvailableFormat.YCbCr_420_888,
                        AvailableFormat.BLOB
                });

    }

    @SmallTest
    public void testReadWriteEnumWithCustomValues() {
        CameraMetadataNative.registerEnumValues(AeAntibandingMode.class, new int[] {
            0,
            10,
            20,
            30
        });

        // byte (single)
        checkKeyGetAndSet("android.control.aeAntibandingMode", AeAntibandingMode.class,
                AeAntibandingMode.AUTO);

        // byte (n)
        checkKeyGetAndSetArray("android.control.aeAvailableAntibandingModes",
                AeAntibandingMode[].class, new AeAntibandingMode[] {
                        AeAntibandingMode.OFF, AeAntibandingMode._50HZ, AeAntibandingMode._60HZ,
                        AeAntibandingMode.AUTO
                });

        Key<AeAntibandingMode[]> aeAntibandingModeKey =
                new Key<AeAntibandingMode[]>("android.control.aeAvailableAntibandingModes",
                        AeAntibandingMode[].class);
        byte[] aeAntibandingModeValues = mMetadata.readValues(CameraMetadataNative
                .getTag("android.control.aeAvailableAntibandingModes"));
        byte[] expectedValues = new byte[] { 0, 10, 20, 30 };
        assertArrayEquals(expectedValues, aeAntibandingModeValues);


        /**
         * Stranger cases that don't use byte enums
         */
        // int (n)
        CameraMetadataNative.registerEnumValues(AvailableFormat.class, new int[] {
            0x20,
            0x32315659,
            0x11,
            0x22,
            0x23,
            0x21,
        });

        checkKeyGetAndSetArray("android.scaler.availableFormats", AvailableFormat[].class,
                new AvailableFormat[] {
                        AvailableFormat.RAW_SENSOR,
                        AvailableFormat.YV12,
                        AvailableFormat.IMPLEMENTATION_DEFINED,
                        AvailableFormat.YCbCr_420_888,
                        AvailableFormat.BLOB
                });

        Key<AvailableFormat[]> availableFormatsKey =
                new Key<AvailableFormat[]>("android.scaler.availableFormats",
                        AvailableFormat[].class);
        byte[] availableFormatValues = mMetadata.readValues(CameraMetadataNative
                .getTag(availableFormatsKey.getName()));

        int[] expectedIntValues = new int[] {
                0x20,
                0x32315659,
                0x22,
                0x23,
                0x21
        };

        ByteBuffer bf = ByteBuffer.wrap(availableFormatValues).order(ByteOrder.nativeOrder());

        assertEquals(expectedIntValues.length * 4, availableFormatValues.length);
        for (int i = 0; i < expectedIntValues.length; ++i) {
            assertEquals(expectedIntValues[i], bf.getInt());
        }
    }

    @SmallTest
    public void testReadWriteSize() {
        // int32 x n
        checkKeyGetAndSet("android.jpeg.thumbnailSize", Size.class, new Size(123, 456));

        // int32 x 2 x n
        checkKeyGetAndSetArray("android.scaler.availableJpegSizes", Size[].class, new Size[] {
            new Size(123, 456),
            new Size(0xDEAD, 0xF00D),
            new Size(0xF00, 0xB00)
        });
    }

    @SmallTest
    public void testReadWriteRectangle() {
        // int32 x n
        checkKeyGetAndSet("android.scaler.cropRegion", Rect.class, new Rect(10, 11, 1280, 1024));

        // int32 x 2 x n
        checkKeyGetAndSetArray("android.statistics.faceRectangles", Rect[].class, new Rect[] {
            new Rect(110, 111, 11280, 11024),
            new Rect(210, 111, 21280, 21024),
            new Rect(310, 111, 31280, 31024)
        });
    }

    @SmallTest
    public void testReadWriteString() {
        // (byte) string
        Key<String> gpsProcessingMethodKey =
                new Key<String>("android.jpeg.gpsProcessingMethod", String.class);

        String helloWorld = new String("HelloWorld");
        byte[] helloWorldBytes = new byte[] {
                'H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd', '\0' };

        mMetadata.set(gpsProcessingMethodKey, helloWorld);

        String actual = mMetadata.get(gpsProcessingMethodKey);
        assertEquals(helloWorld, actual);

        byte[] actualBytes = mMetadata.readValues(getTag(gpsProcessingMethodKey.getName()));
        assertArrayEquals(helloWorldBytes, actualBytes);

        // Does not yet test as a string[] since we don't support that in native code.

        // (byte) string
        Key<String[]> gpsProcessingMethodKeyArray =
                new Key<String[]>("android.jpeg.gpsProcessingMethod", String[].class);

        String[] gpsStrings = new String[] { "HelloWorld", "FooBar", "Shazbot" };
        byte[] gpsBytes = new byte[] {
                'H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd', '\0',
                'F', 'o', 'o', 'B', 'a', 'r', '\0',
                'S', 'h', 'a', 'z', 'b', 'o', 't', '\0'};

        mMetadata.set(gpsProcessingMethodKeyArray, gpsStrings);

        String[] actualArray = mMetadata.get(gpsProcessingMethodKeyArray);
        assertArrayEquals(gpsStrings, actualArray);

        byte[] actualBytes2 = mMetadata.readValues(getTag(gpsProcessingMethodKeyArray.getName()));
        assertArrayEquals(gpsBytes, actualBytes2);
    }

    <T> void compareGeneric(T expected, T actual) {
        assertEquals(expected, actual);
    }

    @SmallTest
    public void testReadWriteOverride() {
        //
        // android.scaler.availableFormats (int x n array)
        //
        int[] availableFormats = new int[] {
                0x20,       // RAW_SENSOR
                0x32315659, // YV12
                0x11,       // YCrCb_420_SP
                0x100,      // ImageFormat.JPEG
                0x22,       // IMPLEMENTATION_DEFINED
                0x23,       // YCbCr_420_888
        };
        int[] expectedIntValues = new int[] {
                0x20,       // RAW_SENSOR
                0x32315659, // YV12
                0x11,       // YCrCb_420_SP
                0x21,       // BLOB
                0x22,       // IMPLEMENTATION_DEFINED
                0x23,       // YCbCr_420_888
        };
        int availableFormatTag = CameraMetadataNative.getTag("android.scaler.availableFormats");

        // Write
        mMetadata.set(CameraCharacteristics.SCALER_AVAILABLE_FORMATS, availableFormats);

        byte[] availableFormatValues = mMetadata.readValues(availableFormatTag);

        ByteBuffer bf = ByteBuffer.wrap(availableFormatValues).order(ByteOrder.nativeOrder());

        assertEquals(expectedIntValues.length * 4, availableFormatValues.length);
        for (int i = 0; i < expectedIntValues.length; ++i) {
            assertEquals(expectedIntValues[i], bf.getInt());
        }
        // Read
        byte[] availableFormatsAsByteArray = new byte[expectedIntValues.length * 4];
        ByteBuffer availableFormatsByteBuffer =
                ByteBuffer.wrap(availableFormatsAsByteArray).order(ByteOrder.nativeOrder());
        for (int value : expectedIntValues) {
            availableFormatsByteBuffer.putInt(value);
        }
        mMetadata.writeValues(availableFormatTag, availableFormatsAsByteArray);

        int[] resultFormats = mMetadata.get(CameraCharacteristics.SCALER_AVAILABLE_FORMATS);
        assertNotNull("result available formats shouldn't be null", resultFormats);
        assertArrayEquals(availableFormats, resultFormats);

        //
        // android.statistics.faces (Face x n array)
        //
        int[] expectedFaceIds = new int[] {1, 2, 3, 4, 5};
        byte[] expectedFaceScores = new byte[] {10, 20, 30, 40, 50};
        int numFaces = expectedFaceIds.length;
        Rect[] expectedRects = new Rect[numFaces];
        for (int i = 0; i < numFaces; i++) {
            expectedRects[i] = new Rect(i*4 + 1, i * 4 + 2, i * 4 + 3, i * 4 + 4);
        }
        int[] expectedFaceLM = new int[] {
                1, 2, 3, 4, 5, 6,
                7, 8, 9, 10, 11, 12,
                13, 14, 15, 16, 17, 18,
                19, 20, 21, 22, 23, 24,
                25, 26, 27, 28, 29, 30,
        };
        Point[] expectedFaceLMPoints = new Point[numFaces * 3];
        for (int i = 0; i < numFaces; i++) {
            expectedFaceLMPoints[i*3] = new Point(expectedFaceLM[i*6], expectedFaceLM[i*6+1]);
            expectedFaceLMPoints[i*3+1] = new Point(expectedFaceLM[i*6+2], expectedFaceLM[i*6+3]);
            expectedFaceLMPoints[i*3+2] = new Point(expectedFaceLM[i*6+4], expectedFaceLM[i*6+5]);
        }

        /**
         * Read - FACE_DETECT_MODE == FULL
         */
        mMetadata.set(CaptureResult.STATISTICS_FACE_DETECT_MODE,
                CaptureResult.STATISTICS_FACE_DETECT_MODE_FULL);
        mMetadata.set(CaptureResult.STATISTICS_FACE_IDS, expectedFaceIds);
        mMetadata.set(CaptureResult.STATISTICS_FACE_SCORES, expectedFaceScores);
        mMetadata.set(CaptureResult.STATISTICS_FACE_RECTANGLES, expectedRects);
        mMetadata.set(CaptureResult.STATISTICS_FACE_LANDMARKS, expectedFaceLM);
        Face[] resultFaces = mMetadata.get(CaptureResult.STATISTICS_FACES);
        assertEquals(numFaces, resultFaces.length);
        for (int i = 0; i < numFaces; i++) {
            assertEquals(expectedFaceIds[i], resultFaces[i].getId());
            assertEquals(expectedFaceScores[i], resultFaces[i].getScore());
            assertEquals(expectedRects[i], resultFaces[i].getBounds());
            assertEquals(expectedFaceLMPoints[i*3], resultFaces[i].getLeftEyePosition());
            assertEquals(expectedFaceLMPoints[i*3+1], resultFaces[i].getRightEyePosition());
            assertEquals(expectedFaceLMPoints[i*3+2], resultFaces[i].getMouthPosition());
        }

        /**
         * Read - FACE_DETECT_MODE == SIMPLE
         */
        mMetadata.set(CaptureResult.STATISTICS_FACE_DETECT_MODE,
                CaptureResult.STATISTICS_FACE_DETECT_MODE_SIMPLE);
        mMetadata.set(CaptureResult.STATISTICS_FACE_SCORES, expectedFaceScores);
        mMetadata.set(CaptureResult.STATISTICS_FACE_RECTANGLES, expectedRects);
        Face[] resultSimpleFaces = mMetadata.get(CaptureResult.STATISTICS_FACES);
        assertEquals(numFaces, resultSimpleFaces.length);
        for (int i = 0; i < numFaces; i++) {
            assertEquals(Face.ID_UNSUPPORTED, resultSimpleFaces[i].getId());
            assertEquals(expectedFaceScores[i], resultSimpleFaces[i].getScore());
            assertEquals(expectedRects[i], resultSimpleFaces[i].getBounds());
            assertNull(resultSimpleFaces[i].getLeftEyePosition());
            assertNull(resultSimpleFaces[i].getRightEyePosition());
            assertNull(resultSimpleFaces[i].getMouthPosition());
        }

    }
}