140 lines
5.4 KiB
Java
140 lines
5.4 KiB
Java
/*
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* Copyright (C) 2021 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.gson;
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import java.io.IOException;
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import java.io.StringReader;
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import java.math.BigDecimal;
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import com.google.gson.internal.LazilyParsedNumber;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.MalformedJsonException;
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import junit.framework.TestCase;
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public class ToNumberPolicyTest extends TestCase {
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public void testDouble() throws IOException {
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ToNumberStrategy strategy = ToNumberPolicy.DOUBLE;
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assertEquals(10.1, strategy.readNumber(fromString("10.1")));
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assertEquals(3.141592653589793D, strategy.readNumber(fromString("3.141592653589793238462643383279")));
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try {
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strategy.readNumber(fromString("1e400"));
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fail();
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} catch (MalformedJsonException expected) {
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assertEquals("JSON forbids NaN and infinities: Infinity at line 1 column 6 (char '\0') path $", expected.getMessage());
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}
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try {
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strategy.readNumber(fromString("\"not-a-number\""));
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fail();
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} catch (NumberFormatException expected) {
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}
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}
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public void testLazilyParsedNumber() throws IOException {
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ToNumberStrategy strategy = ToNumberPolicy.LAZILY_PARSED_NUMBER;
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assertEquals(new LazilyParsedNumber("10.1"), strategy.readNumber(fromString("10.1")));
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assertEquals(new LazilyParsedNumber("3.141592653589793238462643383279"), strategy.readNumber(fromString("3.141592653589793238462643383279")));
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assertEquals(new LazilyParsedNumber("1e400"), strategy.readNumber(fromString("1e400")));
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}
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public void testLongOrDouble() throws IOException {
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ToNumberStrategy strategy = ToNumberPolicy.LONG_OR_DOUBLE;
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assertEquals(10L, strategy.readNumber(fromString("10")));
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assertEquals(10.1, strategy.readNumber(fromString("10.1")));
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assertEquals(3.141592653589793D, strategy.readNumber(fromString("3.141592653589793238462643383279")));
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try {
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strategy.readNumber(fromString("1e400"));
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fail();
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} catch (MalformedJsonException expected) {
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assertEquals("JSON forbids NaN and infinities: Infinity; at path $", expected.getMessage());
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}
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try {
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strategy.readNumber(fromString("\"not-a-number\""));
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fail();
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} catch (JsonParseException expected) {
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assertEquals("Cannot parse not-a-number; at path $", expected.getMessage());
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}
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assertEquals(Double.NaN, strategy.readNumber(fromStringLenient("NaN")));
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assertEquals(Double.POSITIVE_INFINITY, strategy.readNumber(fromStringLenient("Infinity")));
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assertEquals(Double.NEGATIVE_INFINITY, strategy.readNumber(fromStringLenient("-Infinity")));
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try {
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strategy.readNumber(fromString("NaN"));
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fail();
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} catch (MalformedJsonException expected) {
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assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 (char 'N') path $", expected.getMessage());
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}
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try {
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strategy.readNumber(fromString("Infinity"));
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fail();
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} catch (MalformedJsonException expected) {
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assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 (char 'I') path $", expected.getMessage());
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}
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try {
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strategy.readNumber(fromString("-Infinity"));
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fail();
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} catch (MalformedJsonException expected) {
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assertEquals("Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 (char '-') path $", expected.getMessage());
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}
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}
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public void testBigDecimal() throws IOException {
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ToNumberStrategy strategy = ToNumberPolicy.BIG_DECIMAL;
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assertEquals(new BigDecimal("10.1"), strategy.readNumber(fromString("10.1")));
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assertEquals(new BigDecimal("3.141592653589793238462643383279"), strategy.readNumber(fromString("3.141592653589793238462643383279")));
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assertEquals(new BigDecimal("1e400"), strategy.readNumber(fromString("1e400")));
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try {
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strategy.readNumber(fromString("\"not-a-number\""));
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fail();
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} catch (JsonParseException expected) {
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assertEquals("Cannot parse not-a-number; at path $", expected.getMessage());
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}
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}
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public void testNullsAreNeverExpected() throws IOException {
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try {
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ToNumberPolicy.DOUBLE.readNumber(fromString("null"));
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fail();
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} catch (IllegalStateException expected) {
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}
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try {
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ToNumberPolicy.LAZILY_PARSED_NUMBER.readNumber(fromString("null"));
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fail();
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} catch (IllegalStateException expected) {
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}
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try {
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ToNumberPolicy.LONG_OR_DOUBLE.readNumber(fromString("null"));
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fail();
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} catch (IllegalStateException expected) {
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}
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try {
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ToNumberPolicy.BIG_DECIMAL.readNumber(fromString("null"));
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fail();
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} catch (IllegalStateException expected) {
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}
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}
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private static JsonReader fromString(String json) {
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return new JsonReader(new StringReader(json));
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}
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private static JsonReader fromStringLenient(String json) {
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JsonReader jsonReader = fromString(json);
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jsonReader.setLenient(true);
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return jsonReader;
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}
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}
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