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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.text;
import org.junit.Test;
import java.util.LinkedHashMap;
import java.util.Map;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author bratseth
*/
public class JSONTest {
@Test
public void testMapToString() {
Map<String,Object> map = new LinkedHashMap<>();
map.put("a \"key\"", 3);
map.put("key2", "value");
map.put("key3", 3.3);
assertEquals("{\"a \\\"key\\\"\":3,\"key2\":\"value\",\"key3\":3.3}", JSON.encode(map));
}
@Test
public void testEquals() {
assertTrue(JSON.equals("{}", "{}"));
// Whitespace is irrelevant
assertTrue(JSON.equals("{}", "\n{ }"));
// Order of fields in object is irrelevant
assertTrue(JSON.equals("{\"a\":0, \"c\":1}", "{\"c\":1, \"a\":0}"));
// Object equality is not using subset
assertFalse(JSON.equals("{\"a\":0}", "{\"a\":0, \"b\":0}"));
assertFalse(JSON.equals("{\"a\":0, \"b\":0}", "{\"a\":0}"));
// Order of elements of array is significant
assertFalse(JSON.equals("[\"a\",\"b\"]", "[\"b\",\"a\"]"));
// Verify null-valued fields are not ignored
assertFalse(JSON.equals("{\"a\":null}", "{}"));
// Current impl uses BigInteger if integer doesn't fit in a long.
assertEquals(9223372036854775807L, Long.MAX_VALUE);
assertTrue(JSON.equals("{\"a\": 9223372036854775807}", "{\"a\": 9223372036854775807}"));
// double 1.0 and int 1 are different
assertTrue(JSON.equals("{\"a\": 1}", "{\"a\": 1}"));
assertTrue(JSON.equals("{\"a\": 1.0}", "{\"a\": 1.0}"));
assertFalse(JSON.equals("{\"a\": 1.0}", "{\"a\": 1}"));
// Double-precision on numbers. Constant from Math.E.
assertTrue(JSON.equals("{\"e\": 2.71828182845904}", "{\"e\": 2.71828182845904}"));
// Double.MAX_VALUE is 1.7976931348623157e+308
assertTrue(JSON.equals("{\"e\": 1.7976931348623156e+308}", "{\"e\": 1.7976931348623156e+308}"));
// Justification of above float values
double e1 = 2.7182818284590452354;
double e2 = 2.718281828459045;
double e3 = 2.71828182845904;
assertEquals(e1, Math.E, -1);
assertEquals(e1, e2, -1);
assertNotEquals(e1, e3, -1);
// Invalid JSON throws RuntimeException
assertRuntimeException(() -> JSON.equals("", "{}"));
assertRuntimeException(() -> JSON.equals("{}", ""));
assertRuntimeException(() -> JSON.equals("{", "{}"));
assertRuntimeException(() -> JSON.equals("{}", "{"));
}
@Test
public void implementationSpecificEqualsBehavior() {
// Exception thrown if outside a long
assertTrue( JSON.equals("{\"a\": 9223372036854775807}", "{\"a\": 9223372036854775807}"));
assertRuntimeException(() -> JSON.equals("{\"a\": 9223372036854775808}", "{\"a\": 9223372036854775808}"));
// Infinity if floating point number outside of double, and hence equal
assertTrue(JSON.equals("{\"a\": 2.7976931348623158e+308}", "{\"a\": 2.7976931348623158e+308}"));
// Ignores extraneous precision
assertTrue(JSON.equals( "{\"e\": 2.7182818284590452354}",
"{\"e\": 2.7182818284590452354}"));
assertTrue(JSON.equals( "{\"e\": 2.7182818284590452354}",
"{\"e\": 2.7182818284590452355}"));
assertFalse(JSON.equals("{\"e\": 2.7182818284590452354}",
"{\"e\": 2.71828182845904}"));
// Comparing equal but syntactically different numbers
assertFalse(JSON.equals("{\"a\": 1.0}", "{\"a\":1}"));
assertTrue(JSON.equals("{\"a\": 1.0}", "{\"a\":1.00}"));
assertTrue(JSON.equals("{\"a\": 1.0}", "{\"a\":1.0000000000000000000000000000}"));
assertTrue(JSON.equals("{\"a\": 10.0}", "{\"a\":1e1}"));
assertTrue(JSON.equals("{\"a\": 1.2}", "{\"a\":12e-1}"));
}
private static void assertRuntimeException(Runnable runnable) {
try {
runnable.run();
fail("Expected RuntimeException to be thrown, but no exception was thrown");
} catch (RuntimeException e) {
// OK
}
}
}
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