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ArrayGenerationTest.java
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ArrayGenerationTest.java
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package com.fasterxml.jackson.dataformat.cbor.gen;
import java.io.ByteArrayOutputStream;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.JsonParser.NumberType;
import com.fasterxml.jackson.dataformat.cbor.CBORFactory;
import com.fasterxml.jackson.dataformat.cbor.CBORGenerator;
import com.fasterxml.jackson.dataformat.cbor.CBORParser;
import com.fasterxml.jackson.dataformat.cbor.CBORTestBase;
/**
* Basic testing for scalar-array write methods added in 2.8.
*/
public class ArrayGenerationTest extends CBORTestBase
{
private final CBORFactory FACTORY = new CBORFactory();
public void testIntArray() throws Exception
{
_testIntArray();
}
public void testLongArray() throws Exception
{
_testLongArray();
}
public void testDoubleArray() throws Exception
{
_testDoubleArray();
}
public void testMinimalIntValuesForInt() throws Exception
{
// Array with 3 values, with different sizing
_testMinimalIntValuesForInt(1, -1, 3, 11); // single-byte
_testMinimalIntValuesForInt(200, -200, 5, 11); // two-byte (marker, 0xFF)
_testMinimalIntValuesForInt(0xC831, -50000, 7, 11); // three-byte (marker, 0xFFFF)
_testMinimalIntValuesForInt(0x35690001, -(0x7FFFFFF0), 11, 11); // full
}
private void _testMinimalIntValuesForInt(int v1, int v2,
int minLen, int fullLen) throws Exception
{
final int[] input = new int[] { v1, v2 };
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
CBORGenerator gen = FACTORY.createGenerator(bytes);
assertTrue(gen.isEnabled(CBORGenerator.Feature.WRITE_MINIMAL_INTS));
gen.writeArray(input, 0, 2);
gen.close();
// With default settings, should get:
byte[] encoded = bytes.toByteArray();
assertEquals(minLen, encoded.length);
// then verify contents
CBORParser p = FACTORY.createParser(encoded);
assertToken(JsonToken.START_ARRAY, p.nextToken());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.INT, p.getNumberType());
assertEquals(input[0], p.getIntValue());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.INT, p.getNumberType());
assertEquals(input[1], p.getIntValue());
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
// but then also check without minimization
bytes = new ByteArrayOutputStream();
gen = FACTORY.createGenerator(bytes);
gen.disable(CBORGenerator.Feature.WRITE_MINIMAL_INTS);
gen.writeArray(input, 0, 2);
gen.close();
// With default settings, should get:
encoded = bytes.toByteArray();
assertEquals(fullLen, encoded.length);
// then verify contents
p = FACTORY.createParser(encoded);
assertToken(JsonToken.START_ARRAY, p.nextToken());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.INT, p.getNumberType());
assertEquals(input[0], p.getIntValue());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.INT, p.getNumberType());
assertEquals(input[1], p.getIntValue());
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
public void testMinimalIntValuesForLong() throws Exception
{
// Array with 2 values that can't be passed as `int`s but DO fit
// CBOR 5-byte int (sign + 32-bits)
final long[] input = new long[] {
0xffffffffL, // max value that fits
-0xffffffffL - 1 // min value that fits
};
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
CBORGenerator gen = FACTORY.createGenerator(bytes);
assertTrue(gen.isEnabled(CBORGenerator.Feature.WRITE_MINIMAL_INTS));
gen.writeArray(input, 0, 2);
gen.close();
// With default settings, should get:
byte[] encoded = bytes.toByteArray();
assertEquals(11, encoded.length);
// then verify contents
CBORParser p = FACTORY.createParser(encoded);
assertToken(JsonToken.START_ARRAY, p.nextToken());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.LONG, p.getNumberType());
assertEquals(input[0], p.getLongValue());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.LONG, p.getNumberType());
assertEquals(input[1], p.getLongValue());
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
// but then also check without minimization
bytes = new ByteArrayOutputStream();
gen = FACTORY.createGenerator(bytes);
gen.disable(CBORGenerator.Feature.WRITE_MINIMAL_INTS);
gen.writeArray(input, 0, 2);
gen.close();
// With default settings, should get:
encoded = bytes.toByteArray();
assertEquals(19, encoded.length);
// then verify contents
p = FACTORY.createParser(encoded);
assertToken(JsonToken.START_ARRAY, p.nextToken());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.LONG, p.getNumberType());
assertEquals(input[0], p.getLongValue());
assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(NumberType.LONG, p.getNumberType());
assertEquals(input[1], p.getLongValue());
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
private void _testIntArray() throws Exception {
// first special cases of 0, 1 values
_testIntArray(0, 0, 0);
_testIntArray(0, 1, 1);
_testIntArray(1, 0, 0);
_testIntArray(1, 1, 1);
// and then some bigger data
_testIntArray(15, 0, 0);
_testIntArray(15, 2, 3);
_testIntArray(39, 0, 0);
_testIntArray(39, 4, 0);
_testIntArray(271, 0, 0);
_testIntArray(271, 0, 4);
_testIntArray(666, 0, 0);
_testIntArray(789, 0, 4);
_testIntArray(5009, 0, 0);
_testIntArray(7777, 0, 1);
}
private void _testLongArray() throws Exception {
// first special cases of 0, 1 values
_testLongArray(0, 0, 0);
_testLongArray(0, 1, 1);
_testLongArray(1, 0, 0);
_testLongArray(1, 1, 1);
// and then some bigger data
_testLongArray(15, 0, 0);
_testLongArray(15, 2, 3);
_testLongArray(39, 0, 0);
_testLongArray(39, 4, 0);
_testLongArray(271, 0, 0);
_testLongArray(271, 0, 4);
_testLongArray(911, 0, 0);
_testLongArray(1121, 0, 1);
_testLongArray(5009, 0, 0);
_testLongArray(6110, 0, 1);
}
private void _testDoubleArray() throws Exception {
// first special cases of 0, 1 values
_testDoubleArray(0, 0, 0);
_testDoubleArray(0, 1, 1);
_testDoubleArray(1, 0, 0);
_testDoubleArray(1, 1, 1);
// and then some bigger data
_testDoubleArray(15, 0, 0);
_testDoubleArray(15, 2, 3);
_testDoubleArray(39, 0, 0);
_testDoubleArray(39, 4, 0);
_testDoubleArray(271, 0, 0);
_testDoubleArray(271, 0, 4);
_testDoubleArray(744, 0, 0);
_testDoubleArray(999, 0, 4);
_testDoubleArray(5009, 0, 0);
_testDoubleArray(7256, 0, 1);
}
private void _testIntArray(int elements, int pre, int post) throws Exception
{
int[] values = new int[elements+pre+post];
for (int i = pre, end = pre+elements; i < end; ++i) {
values[i] = i-pre;
}
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
JsonGenerator gen = FACTORY.createGenerator(bytes);
gen.writeArray(values, pre, elements);
gen.close();
JsonParser p = FACTORY.createParser(bytes.toByteArray());
assertToken(JsonToken.START_ARRAY, p.nextToken());
for (int i = 0; i < elements; ++i) {
if ((i & 1) == 0) { // alternate
JsonToken t = p.nextToken();
if (t != JsonToken.VALUE_NUMBER_INT) {
fail("Expected number, got "+t+", element #"+i);
}
int act = p.getIntValue();
if (act != i) {
fail("Entry #"+i+", expected "+i+", got "+act);
}
} else {
assertEquals(i, p.nextIntValue(-1));
}
}
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
private void _testLongArray(int elements, int pre, int post) throws Exception
{
long[] values = new long[elements+pre+post];
for (int i = pre, end = pre+elements; i < end; ++i) {
values[i] = i-pre;
}
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
JsonGenerator gen = FACTORY.createGenerator(bytes);
gen.writeArray(values, pre, elements);
gen.close();
JsonParser p = FACTORY.createParser(bytes.toByteArray());
assertToken(JsonToken.START_ARRAY, p.nextToken());
for (int i = 0; i < elements; ++i) {
if ((i & 1) == 0) { // alternate
JsonToken t = p.nextToken();
if (t != JsonToken.VALUE_NUMBER_INT) {
fail("Expected number, got "+t+", element #"+i);
}
long act = p.getLongValue();
if (act != i) {
fail("Entry #"+i+", expected "+i+", got "+act);
}
} else {
assertEquals(i, p.nextLongValue(-1));
}
}
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
private void _testDoubleArray(int elements, int pre, int post) throws Exception
{
double[] values = new double[elements+pre+post];
for (int i = pre, end = pre+elements; i < end; ++i) {
values[i] = i-pre;
}
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
JsonGenerator gen = FACTORY.createGenerator(bytes);
gen.writeArray(values, pre, elements);
gen.close();
JsonParser p = FACTORY.createParser(bytes.toByteArray());
assertToken(JsonToken.START_ARRAY, p.nextToken());
for (int i = 0; i < elements; ++i) {
JsonToken t = p.nextToken();
if (t != JsonToken.VALUE_NUMBER_FLOAT) {
fail("Expected floating-point number, got "+t+", element #"+i);
}
assertEquals((double) i, p.getDoubleValue());
}
assertToken(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
}