package com.fasterxml.jackson.core.main;
import com.fasterxml.jackson.core.*;
import java.io.*;
/**
* Set of basic unit tests for verifying that the basic generator
* functionality works as expected.
*/
public class TestJsonGenerator
extends com.fasterxml.jackson.test.BaseTest
{
// // // First, tests for primitive (non-structured) values
public void testStringWrite()
throws Exception
{
JsonFactory jf = new JsonFactory();
String[] inputStrings = new String[] { "", "X", "1234567890" };
for (int useReader = 0; useReader < 2; ++useReader) {
for (int writeString = 0; writeString < 2; ++writeString) {
for (int strIx = 0; strIx < inputStrings.length; ++strIx) {
String input = inputStrings[strIx];
JsonGenerator gen;
ByteArrayOutputStream bout = new ByteArrayOutputStream();
if (useReader != 0) {
gen = jf.createJsonGenerator(new OutputStreamWriter(bout, "UTF-8"));
} else {
gen = jf.createJsonGenerator(bout, JsonEncoding.UTF8);
}
if (writeString > 0) {
gen.writeString(input);
} else {
int len = input.length();
char[] buffer = new char[len + 20];
// Let's use non-zero base offset too...
input.getChars(0, len, buffer, strIx);
gen.writeString(buffer, strIx, len);
}
gen.flush();
gen.close();
JsonParser jp = jf.createJsonParser(new ByteArrayInputStream(bout.toByteArray()));
JsonToken t = jp.nextToken();
assertNotNull("Document \""+bout.toString("UTF-8")+"\" yielded no tokens", t);
assertEquals(JsonToken.VALUE_STRING, t);
assertEquals(input, jp.getText());
assertEquals(null, jp.nextToken());
jp.close();
}
}
}
}
public void testIntWrite()
throws Exception
{
doTestIntWrite(false);
doTestIntWrite(true);
}
public void testLongWrite()
throws Exception
{
doTestLongWrite(false);
doTestLongWrite(true);
}
public void testBooleanWrite()
throws Exception
{
for (int i = 0; i < 4; ++i) {
boolean state = (i & 1) == 0;
boolean pad = (i & 2) == 0;
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeBoolean(state);
if (pad) {
gen.writeRaw(" ");
}
gen.close();
String docStr = sw.toString();
JsonParser jp = createParserUsingReader(docStr);
JsonToken t = jp.nextToken();
String exp = Boolean.valueOf(state).toString();
if (!exp.equals(jp.getText())) {
fail("Expected '"+exp+"', got '"+jp.getText());
}
assertEquals(state ? JsonToken.VALUE_TRUE : JsonToken.VALUE_FALSE, t);
assertEquals(null, jp.nextToken());
jp.close();
}
}
public void testNullWrite()
throws Exception
{
for (int i = 0; i < 2; ++i) {
boolean pad = (i & 1) == 0;
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeNull();
if (pad) {
gen.writeRaw(" ");
}
gen.close();
String docStr = sw.toString();
JsonParser jp = createParserUsingReader(docStr);
JsonToken t = jp.nextToken();
String exp = "null";
if (!exp.equals(jp.getText())) {
fail("Expected '"+exp+"', got '"+jp.getText());
}
assertEquals(JsonToken.VALUE_NULL, t);
assertEquals(null, jp.nextToken());
jp.close();
}
}
// // Then root-level output testing
public void testRootIntsWrite()
throws Exception
{
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeNumber(1);
gen.writeNumber(2);
gen.writeNumber(-13);
gen.close();
String docStr = sw.toString();
JsonParser jp = createParserUsingReader(docStr);
assertEquals(JsonToken.VALUE_NUMBER_INT, jp.nextToken());
assertEquals(1, jp.getIntValue());
assertEquals(JsonToken.VALUE_NUMBER_INT, jp.nextToken());
assertEquals(2, jp.getIntValue());
assertEquals(JsonToken.VALUE_NUMBER_INT, jp.nextToken());
assertEquals(-13, jp.getIntValue());
jp.close();
}
// Convenience methods
public void testFieldValueWrites()
throws Exception
{
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeStartObject();
gen.writeNumberField("long", 3L);
gen.writeNumberField("double", 0.25);
gen.writeNumberField("float", -0.25f);
gen.writeEndObject();
gen.close();
assertEquals("{\"long\":3,\"double\":0.25,\"float\":-0.25}", sw.toString().trim());
}
/*
/**********************************************************
/* Internal methods
/**********************************************************
*/
private void doTestIntWrite(boolean pad)
throws Exception
{
int[] VALUES = new int[] {
0, 1, -9, 32, -32, 57, 13240, -9999, Integer.MAX_VALUE, Integer.MAX_VALUE
};
for (int i = 0; i < VALUES.length; ++i) {
int VALUE = VALUES[i];
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeNumber(VALUE);
if (pad) {
gen.writeRaw(" ");
}
gen.close();
String docStr = sw.toString();
JsonParser jp = createParserUsingReader(docStr);
JsonToken t = jp.nextToken();
assertNotNull("Document \""+docStr+"\" yielded no tokens", t);
// Number are always available as lexical representation too
String exp = ""+VALUE;
if (!exp.equals(jp.getText())) {
fail("Expected '"+exp+"', got '"+jp.getText());
}
assertEquals(JsonToken.VALUE_NUMBER_INT, t);
assertEquals(VALUE, jp.getIntValue());
assertEquals(null, jp.nextToken());
jp.close();
}
}
private void doTestLongWrite(boolean pad)
throws Exception
{
long[] VALUES = new long[] {
0L, 1L, -1L, -12005002294L, Long.MIN_VALUE, Long.MAX_VALUE
};
for (int i = 0; i < VALUES.length; ++i) {
long VALUE = VALUES[i];
StringWriter sw = new StringWriter();
JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
gen.writeNumber(VALUE);
if (pad) {
gen.writeRaw(" ");
}
gen.close();
String docStr = sw.toString();
JsonParser jp = createParserUsingReader(docStr);
JsonToken t = jp.nextToken();
assertNotNull("Document \""+docStr+"\" yielded no tokens", t);
String exp = ""+VALUE;
if (!exp.equals(jp.getText())) {
fail("Expected '"+exp+"', got '"+jp.getText());
}
assertEquals(JsonToken.VALUE_NUMBER_INT, t);
assertEquals(VALUE, jp.getLongValue());
assertEquals(null, jp.nextToken());
jp.close();
}
}
}