Merge "Move Json{Reader,Writer} test to cts."

/*

 * Copyright (C) 2010 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.util;

import java.io.IOException;

import java.io.StringWriter;

import java.math.BigDecimal;

import java.math.BigInteger;

import junit.framework.TestCase;

public final class JsonWriterTest extends TestCase {

    public void testWrongTopLevelType() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        try {

            jsonWriter.value("a");

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testTwoNames() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.name("a");

        try {

            jsonWriter.name("a");

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testNameWithoutValue() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.name("a");

        try {

            jsonWriter.endObject();

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testValueWithoutName() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        try {

            jsonWriter.value(true);

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testMultipleTopLevelValues() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray().endArray();

        try {

            jsonWriter.beginArray();

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testBadNestingObject() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.beginObject();

        try {

            jsonWriter.endArray();

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testBadNestingArray() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.beginArray();

        try {

            jsonWriter.endObject();

            fail();

        } catch (IllegalStateException expected) {

        }

    }

    public void testNullName() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        try {

            jsonWriter.name(null);

            fail();

        } catch (NullPointerException expected) {

        }

    }

    public void testNullStringValue() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.name("a");

        jsonWriter.value((String) null);

        jsonWriter.endObject();

        assertEquals("{\"a\":null}", stringWriter.toString());

    }

    public void testNonFiniteDoubles() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        try {

            jsonWriter.value(Double.NaN);

            fail();

        } catch (IllegalArgumentException expected) {

        }

        try {

            jsonWriter.value(Double.NEGATIVE_INFINITY);

            fail();

        } catch (IllegalArgumentException expected) {

        }

        try {

            jsonWriter.value(Double.POSITIVE_INFINITY);

            fail();

        } catch (IllegalArgumentException expected) {

        }

    }

    public void testNonFiniteBoxedDoubles() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        try {

            jsonWriter.value(new Double(Double.NaN));

            fail();

        } catch (IllegalArgumentException expected) {

        }

        try {

            jsonWriter.value(new Double(Double.NEGATIVE_INFINITY));

            fail();

        } catch (IllegalArgumentException expected) {

        }

        try {

            jsonWriter.value(new Double(Double.POSITIVE_INFINITY));

            fail();

        } catch (IllegalArgumentException expected) {

        }

    }

    public void testDoubles() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value(-0.0);

        jsonWriter.value(1.0);

        jsonWriter.value(Double.MAX_VALUE);

        jsonWriter.value(Double.MIN_VALUE);

        jsonWriter.value(0.0);

        jsonWriter.value(-0.5);

        jsonWriter.value(Double.MIN_NORMAL);

        jsonWriter.value(Math.PI);

        jsonWriter.value(Math.E);

        jsonWriter.endArray();

        jsonWriter.close();

        assertEquals("[-0.0,"

                + "1.0,"

                + "1.7976931348623157E308,"

                + "4.9E-324,"

                + "0.0,"

                + "-0.5,"

                + "2.2250738585072014E-308,"

                + "3.141592653589793,"

                + "2.718281828459045]", stringWriter.toString());

    }

    public void testLongs() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value(0);

        jsonWriter.value(1);

        jsonWriter.value(-1);

        jsonWriter.value(Long.MIN_VALUE);

        jsonWriter.value(Long.MAX_VALUE);

        jsonWriter.endArray();

        jsonWriter.close();

        assertEquals("[0,"

                + "1,"

                + "-1,"

                + "-9223372036854775808,"

                + "9223372036854775807]", stringWriter.toString());

    }

    public void testNumbers() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value(new BigInteger("0"));

        jsonWriter.value(new BigInteger("9223372036854775808"));

        jsonWriter.value(new BigInteger("-9223372036854775809"));

        jsonWriter.value(new BigDecimal("3.141592653589793238462643383"));

        jsonWriter.endArray();

        jsonWriter.close();

        assertEquals("[0,"

                + "9223372036854775808,"

                + "-9223372036854775809,"

                + "3.141592653589793238462643383]", stringWriter.toString());

    }

    public void testBooleans() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value(true);

        jsonWriter.value(false);

        jsonWriter.endArray();

        assertEquals("[true,false]", stringWriter.toString());

    }

    public void testNulls() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.nullValue();

        jsonWriter.endArray();

        assertEquals("[null]", stringWriter.toString());

    }

    public void testStrings() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value("a");

        jsonWriter.value("a\"");

        jsonWriter.value("\"");

        jsonWriter.value(":");

        jsonWriter.value(",");

        jsonWriter.value("\b");

        jsonWriter.value("\f");

        jsonWriter.value("\n");

        jsonWriter.value("\r");

        jsonWriter.value("\t");

        jsonWriter.value(" ");

        jsonWriter.value("\\");

        jsonWriter.value("{");

        jsonWriter.value("}");

        jsonWriter.value("[");

        jsonWriter.value("]");

        jsonWriter.value("\0");

        jsonWriter.value("\u0019");

        jsonWriter.endArray();

        assertEquals("[\"a\","

                + "\"a\\\"\","

                + "\"\\\"\","

                + "\":\","

                + "\",\","

                + "\"\\b\","

                + "\"\\f\","

                + "\"\\n\","

                + "\"\\r\","

                + "\"\\t\","

                + "\" \","

                + "\"\\\\\","

                + "\"{\","

                + "\"}\","

                + "\"[\","

                + "\"]\","

                + "\"\\u0000\","

                + "\"\\u0019\"]", stringWriter.toString());

    }

    public void testUnicodeLineBreaksEscaped() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.value("\u2028 \u2029");

        jsonWriter.endArray();

        assertEquals("[\"\\u2028 \\u2029\"]", stringWriter.toString());

    }

    public void testEmptyArray() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.endArray();

        assertEquals("[]", stringWriter.toString());

    }

    public void testEmptyObject() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.endObject();

        assertEquals("{}", stringWriter.toString());

    }

    public void testObjectsInArrays() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginArray();

        jsonWriter.beginObject();

        jsonWriter.name("a").value(5);

        jsonWriter.name("b").value(false);

        jsonWriter.endObject();

        jsonWriter.beginObject();

        jsonWriter.name("c").value(6);

        jsonWriter.name("d").value(true);

        jsonWriter.endObject();

        jsonWriter.endArray();

        assertEquals("[{\"a\":5,\"b\":false},"

                + "{\"c\":6,\"d\":true}]", stringWriter.toString());

    }

    public void testArraysInObjects() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.name("a");

        jsonWriter.beginArray();

        jsonWriter.value(5);

        jsonWriter.value(false);

        jsonWriter.endArray();

        jsonWriter.name("b");

        jsonWriter.beginArray();

        jsonWriter.value(6);

        jsonWriter.value(true);

        jsonWriter.endArray();

        jsonWriter.endObject();

        assertEquals("{\"a\":[5,false],"

                + "\"b\":[6,true]}", stringWriter.toString());

    }

    public void testDeepNestingArrays() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        for (int i = 0; i < 20; i++) {

            jsonWriter.beginArray();

        }

        for (int i = 0; i < 20; i++) {

            jsonWriter.endArray();

        }

        assertEquals("[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]", stringWriter.toString());

    }

    public void testDeepNestingObjects() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        for (int i = 0; i < 20; i++) {

            jsonWriter.name("a");

            jsonWriter.beginObject();

        }

        for (int i = 0; i < 20; i++) {

            jsonWriter.endObject();

        }

        jsonWriter.endObject();

        assertEquals("{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":"

                + "{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{\"a\":{"

                + "}}}}}}}}}}}}}}}}}}}}}", stringWriter.toString());

    }

    public void testRepeatedName() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.beginObject();

        jsonWriter.name("a").value(true);

        jsonWriter.name("a").value(false);

        jsonWriter.endObject();

        // JsonWriter doesn't attempt to detect duplicate names

        assertEquals("{\"a\":true,\"a\":false}", stringWriter.toString());

    }

    public void testPrettyPrintObject() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.setIndent("   ");

        jsonWriter.beginObject();

        jsonWriter.name("a").value(true);

        jsonWriter.name("b").value(false);

        jsonWriter.name("c").value(5.0);

        jsonWriter.name("e").nullValue();

        jsonWriter.name("f").beginArray();

        jsonWriter.value(6.0);

        jsonWriter.value(7.0);

        jsonWriter.endArray();

        jsonWriter.name("g").beginObject();

        jsonWriter.name("h").value(8.0);

        jsonWriter.name("i").value(9.0);

        jsonWriter.endObject();

        jsonWriter.endObject();

        String expected = "{\n"

                + "   \"a\": true,\n"

                + "   \"b\": false,\n"

                + "   \"c\": 5.0,\n"

                + "   \"e\": null,\n"

                + "   \"f\": [\n"

                + "      6.0,\n"

                + "      7.0\n"

                + "   ],\n"

                + "   \"g\": {\n"

                + "      \"h\": 8.0,\n"

                + "      \"i\": 9.0\n"

                + "   }\n"

                + "}";

        assertEquals(expected, stringWriter.toString());

    }

    public void testPrettyPrintArray() throws IOException {

        StringWriter stringWriter = new StringWriter();

        JsonWriter jsonWriter = new JsonWriter(stringWriter);

        jsonWriter.setIndent("   ");

        jsonWriter.beginArray();

        jsonWriter.value(true);

        jsonWriter.value(false);

        jsonWriter.value(5.0);

        jsonWriter.nullValue();

        jsonWriter.beginObject();

        jsonWriter.name("a").value(6.0);

        jsonWriter.name("b").value(7.0);

        jsonWriter.endObject();

        jsonWriter.beginArray();

        jsonWriter.value(8.0);

        jsonWriter.value(9.0);

        jsonWriter.endArray();

        jsonWriter.endArray();

        String expected = "[\n"

                + "   true,\n"

                + "   false,\n"

                + "   5.0,\n"

                + "   null,\n"

                + "   {\n"

                + "      \"a\": 6.0,\n"

                + "      \"b\": 7.0\n"

                + "   },\n"

                + "   [\n"

                + "      8.0,\n"

                + "      9.0\n"

                + "   ]\n"

                + "]";

        assertEquals(expected, stringWriter.toString());

    }

}