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/*
* Copyright (C) 2012 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.gallery3d.exif;
import android.test.suitebuilder.annotation.SmallTest;
import junit.framework.TestCase;
import java.util.HashMap;
import java.util.Map;
public class ExifTagTest extends TestCase {
private static long MAX_UNSIGNED_LONG = (1L << 32) - 1;
private static int MAX_LONG = Integer.MAX_VALUE;
private static int MIN_LONG = Integer.MIN_VALUE;
Map<Integer, ExifTag> mTestTags;
ExifInterface mInterface;
private ExifTag mVersionTag;
private ExifTag mGpsVersionTag;
private ExifTag mModelTag;
private ExifTag mDateTimeTag;
private ExifTag mCompressionTag;
private ExifTag mThumbnailFormatTag;
private ExifTag mLongitudeTag;
private ExifTag mShutterTag;
private ExifTag mInteropIndex;
@Override
public void setUp() throws Exception {
super.setUp();
mInterface = new ExifInterface();
// TYPE_UNDEFINED with 4 components
mVersionTag = mInterface.buildTag(ExifInterface.TAG_EXIF_VERSION, new byte[] {
5, 4, 3, 2
});
// TYPE_UNSIGNED_BYTE with 4 components
mGpsVersionTag = mInterface.buildTag(ExifInterface.TAG_GPS_VERSION_ID, new byte[] {
6, 7, 8, 9
});
// TYPE ASCII with arbitrary length
mModelTag = mInterface.buildTag(ExifInterface.TAG_MODEL, "helloworld");
// TYPE_ASCII with 20 components
mDateTimeTag = mInterface.buildTag(ExifInterface.TAG_DATE_TIME, "2013:02:11 20:20:20");
// TYPE_UNSIGNED_SHORT with 1 components
mCompressionTag = mInterface.buildTag(ExifInterface.TAG_COMPRESSION, 100);
// TYPE_UNSIGNED_LONG with 1 components
mThumbnailFormatTag =
mInterface.buildTag(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT, 100);
// TYPE_UNSIGNED_RATIONAL with 3 components
mLongitudeTag = mInterface.buildTag(ExifInterface.TAG_GPS_LONGITUDE, new Rational[] {
new Rational(2, 2), new Rational(11, 11),
new Rational(102, 102)
});
// TYPE_RATIONAL with 1 components
mShutterTag = mInterface
.buildTag(ExifInterface.TAG_SHUTTER_SPEED_VALUE, new Rational(4, 6));
// TYPE_ASCII with arbitrary length
mInteropIndex = mInterface.buildTag(ExifInterface.TAG_INTEROPERABILITY_INDEX, "foo");
mTestTags = new HashMap<Integer, ExifTag>();
mTestTags.put(ExifInterface.TAG_EXIF_VERSION, mVersionTag);
mTestTags.put(ExifInterface.TAG_GPS_VERSION_ID, mGpsVersionTag);
mTestTags.put(ExifInterface.TAG_MODEL, mModelTag);
mTestTags.put(ExifInterface.TAG_DATE_TIME, mDateTimeTag);
mTestTags.put(ExifInterface.TAG_COMPRESSION, mCompressionTag);
mTestTags.put(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT, mThumbnailFormatTag);
mTestTags.put(ExifInterface.TAG_GPS_LONGITUDE, mLongitudeTag);
mTestTags.put(ExifInterface.TAG_SHUTTER_SPEED_VALUE, mShutterTag);
mTestTags.put(ExifInterface.TAG_INTEROPERABILITY_INDEX, mInteropIndex);
}
@Override
public void tearDown() throws Exception {
super.tearDown();
mInterface = null;
mTestTags = null;
}
@SmallTest
public void testValueType() {
for (ExifTag tag : mTestTags.values()) {
assertTrue(tag != null);
int count = tag.getComponentCount();
int intBuf[] = new int[count];
long longBuf[] = new long[count];
byte byteBuf[] = new byte[count];
Rational rationalBuf[] = new Rational[count];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < count; i++) {
intBuf[i] = 0;
longBuf[i] = 0;
byteBuf[i] = 0;
rationalBuf[i] = new Rational(0, 0);
// The string size should equal to component count - 1
if (i != count - 1) {
sb.append("*");
} else {
sb.append("\0");
}
}
String strBuf = sb.toString();
checkTypeByte(tag, byteBuf);
checkTypeAscii(tag, strBuf);
checkTypeUnsignedShort(tag, intBuf);
checkTypeUnsignedLong(tag, intBuf, longBuf);
checkTypeLong(tag, intBuf);
checkTypeRational(tag, rationalBuf);
checkTypeUnsignedRational(tag, rationalBuf);
}
}
private void checkTypeByte(ExifTag tag, byte[] buf) {
short type = tag.getDataType();
assertFalse("\nTag: " + tag.toString(), tag.setValue(buf)
^ (type == ExifTag.TYPE_UNDEFINED || type == ExifTag.TYPE_UNSIGNED_BYTE));
}
private void checkTypeAscii(ExifTag tag, String str) {
short type = tag.getDataType();
assertFalse("\nTag: " + tag.toString(), tag.setValue(str)
^ (type == ExifTag.TYPE_ASCII || type == ExifTag.TYPE_UNDEFINED));
}
private void checkTypeUnsignedShort(ExifTag tag, int[] intBuf) {
short type = tag.getDataType();
assertFalse("\nTag: " + tag.toString(),
tag.setValue(intBuf)
^ (type == ExifTag.TYPE_UNSIGNED_SHORT
|| type == ExifTag.TYPE_UNSIGNED_LONG
|| type == ExifTag.TYPE_LONG));
}
private void checkTypeUnsignedLong(ExifTag tag, int[] intBuf, long[] longBuf) {
// Test value only for unsigned long.
int count = intBuf.length;
intBuf[count - 1] = MAX_LONG;
tag.setValue(intBuf);
longBuf[count - 1] = MAX_UNSIGNED_LONG;
assertFalse("\nTag: " + tag.toString(), tag.setValue(longBuf)
^ (tag.getDataType() == ExifTag.TYPE_UNSIGNED_LONG));
intBuf[count - 1] = 0;
// Test invalid value for all type.
longBuf[count - 1] = MAX_UNSIGNED_LONG + 1;
assertFalse(tag.setValue(longBuf));
longBuf[count - 1] = 0;
}
private void checkTypeLong(ExifTag tag, int[] intBuf) {
int count = intBuf.length;
intBuf[count - 1] = MAX_LONG;
tag.setValue(intBuf);
intBuf[count - 1] = MIN_LONG;
assertFalse("\nTag: " + tag.toString(), tag.setValue(intBuf)
^ (tag.getDataType() == ExifTag.TYPE_LONG));
intBuf[count - 1] = 0;
}
private void checkTypeRational(ExifTag tag, Rational rationalBuf[]) {
int count = rationalBuf.length;
Rational r = rationalBuf[count - 1];
rationalBuf[count - 1] = new Rational(MAX_LONG, MIN_LONG);
assertFalse("\nTag: " + tag.toString(), tag.setValue(rationalBuf)
^ (tag.getDataType() == ExifTag.TYPE_RATIONAL));
if (tag.getDataType() == ExifTag.TYPE_RATIONAL) {
// check overflow
rationalBuf[count - 1] = new Rational(MAX_LONG + 1L, MIN_LONG);
assertFalse(tag.setValue(rationalBuf));
rationalBuf[count - 1] = new Rational(MAX_LONG, MIN_LONG - 1L);
assertFalse(tag.setValue(rationalBuf));
}
rationalBuf[count - 1] = r;
}
private void checkTypeUnsignedRational(ExifTag tag, Rational rationalBuf[]) {
int count = rationalBuf.length;
Rational r = rationalBuf[count - 1];
rationalBuf[count - 1] = new Rational(MAX_UNSIGNED_LONG, MAX_UNSIGNED_LONG);
assertFalse("\nTag: " + tag.toString(), tag.setValue(rationalBuf)
^ (tag.getDataType() == ExifTag.TYPE_UNSIGNED_RATIONAL));
if (tag.getDataType() == ExifTag.TYPE_UNSIGNED_RATIONAL) {
// check overflow
rationalBuf[count - 1] = new Rational(MAX_UNSIGNED_LONG + 1, 0);
assertFalse(tag.setValue(rationalBuf));
rationalBuf[count - 1] = new Rational(MAX_UNSIGNED_LONG, -1);
assertFalse(tag.setValue(rationalBuf));
}
rationalBuf[count - 1] = r;
}
}
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