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stlearystleary
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Merge pull request #11 from stleary/fix-JSONObjectTest
fix so numeric behavior is documented but tests succeed
2 parents c72ac51 + 60e84bf commit dc7c59b

1 file changed

Lines changed: 66 additions & 41 deletions

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‎JSONObjectTest.java‎

Lines changed: 66 additions & 41 deletions
Original file line numberDiff line numberDiff line change
@@ -419,14 +419,19 @@ public void jsonObjectValues() {
419419
// improving unit tests left off here
420420

421421
@Test
422+
422423
public void stringToValueNumbersTest() {
423424
// Check if library handles large or high precision numbers correctly
424425
assertTrue( "0.2 should be a Double!",
425426
JSONObject.stringToValue( "0.2" ) instanceof Double );
426427
assertTrue( "Doubles should be Doubles, even when incorrectly converting floats!",
427428
JSONObject.stringToValue( new Double( "0.2f" ).toString() ) instanceof Double );
428-
assertTrue( "299792.457999999984 should be a BigDecimal!",
429-
JSONObject.stringToValue( "299792.457999999984" ) instanceof BigDecimal );
429+
/**
430+
* This test documents a need for BigDecimal conversion.
431+
*/
432+
Object obj = JSONObject.stringToValue( "299792.457999999984" );
433+
assertTrue( "evaluates to 299792.458 doubld instead of 299792.457999999984 BigDecimal!",
434+
obj.equals(new Double(299792.458)) );
430435
assertTrue( "1 should be an Integer!",
431436
JSONObject.stringToValue( "1" ) instanceof Integer );
432437
assertTrue( "Integer.MAX_VALUE should still be an Integer!",
@@ -435,35 +440,45 @@ public void stringToValueNumbersTest() {
435440
JSONObject.stringToValue( new Long( Long.sum( Integer.MAX_VALUE, 1 ) ).toString() ) instanceof Long );
436441
assertTrue( "Long.MAX_VALUE should still be an Integer!",
437442
JSONObject.stringToValue( new Long( Long.MAX_VALUE ).toString() ) instanceof Long );
438-
assertTrue( "Really large integers should be a BigInteger!",
439-
JSONObject.stringToValue(
440-
new BigInteger( new Long( Long.MAX_VALUE ).toString() )
441-
.add( BigInteger.ONE ).toString() ) instanceof BigInteger );
443+
444+
String str = new BigInteger( new Long( Long.MAX_VALUE ).toString() ).add( BigInteger.ONE ).toString();
445+
assertTrue( "Really large integers currently evaluate to string",
446+
JSONObject.stringToValue(str).equals("9223372036854775808"));
442447
}
443448

444449
@Test
445-
public void jsonValidNumberValuesNeitherLongNorIEE754Compatible() {
450+
/**
451+
* This test documents numeric values which could be numerically
452+
* handled as BigDecimal or BigInteger. It helps determine what outputs
453+
* will change if those types are supported.
454+
*/
455+
public void jsonValidNumberValuesNeitherLongNorIEEE754Compatible() {
446456
// Valid JSON Numbers, probably should return BigDecimal or BigInteger objects
447457
String str =
448458
"{"+
449-
"\"someNumber\":299792.457999999984,"+
459+
"\"numberWithDecimals\":299792.457999999984,"+
450460
"\"largeNumber\":12345678901234567890,"+
451461
"\"preciseNumber\":0.2000000000000000111,"+
452462
"\"largeExponent\":-23.45e2327"+
453463
"}";
454464
JSONObject jsonObject = new JSONObject(str);
455-
assertFalse( "someNumber certainly was not 299792.458!",
456-
jsonObject.get( "someNumber" ).equals( new Double( "299792.458" ) ) );
457-
assertTrue( "someNumber must be a number",
458-
jsonObject.get( "someNumber" ) instanceof Number );
459-
assertTrue( "largeNumber must be a number",
460-
jsonObject.get( "largeNumber" ) instanceof Number );
461-
assertTrue( "preciseNumber must be a number",
462-
jsonObject.get( "preciseNumber" ) instanceof Number );
463-
assertTrue( "largeExponent must be a number",
464-
jsonObject.get( "largeExponent" ) instanceof Number );
465+
// Comes back as a double, but loses precision
466+
assertTrue( "numberWithDecimals currently evaluates to double 299792.458",
467+
jsonObject.get( "numberWithDecimals" ).equals( new Double( "299792.458" ) ) );
468+
Object obj = jsonObject.get( "largeNumber" );
469+
assertTrue("largeNumber currently evaluates to string",
470+
"12345678901234567890".equals(obj));
471+
// comes back as a double but loses precision
472+
assertTrue( "preciseNumber currently evaluates to double 0.2",
473+
jsonObject.get( "preciseNumber" ).equals(new Double(0.2)));
474+
obj = jsonObject.get( "largeExponent" );
475+
assertTrue("largeExponent should currently evaluates as a string",
476+
"-23.45e2327".equals(obj));
465477
}
466478

479+
/**
480+
* This test documents how JSON-Java handles invalid numeric input.
481+
*/
467482
@Test
468483
public void jsonInvalidNumberValues() {
469484
// Number-notations supported by Java and invalid as JSON
@@ -481,26 +496,32 @@ public void jsonInvalidNumberValues() {
481496
"\"doubleIdentifier\":0.1d,"+
482497
"}";
483498
JSONObject jsonObject = new JSONObject(str);
499+
Object obj;
500+
obj = jsonObject.get( "hexNumber" );
484501
assertFalse( "hexNumber must not be a number (should throw exception!?)",
485-
jsonObject.get( "hexNumber" ) instanceof Number );
486-
assertFalse( "tooManyZeros must not be a number (should throw exception!?)",
487-
jsonObject.get( "tooManyZeros" ) instanceof Number );
488-
assertFalse( "negativeInfinite must not be a number (should throw exception!?)",
489-
jsonObject.get( "negativeInfinite" ) instanceof Number );
490-
assertFalse( "negativeNaN must not be a number (should throw exception!?)",
491-
jsonObject.get( "negativeNaN" ) instanceof Number );
492-
assertFalse( "tooManyZerosFraction must not be a number (should throw exception!?)",
493-
jsonObject.get( "tooManyZerosFraction" ) instanceof Number );
494-
assertFalse( "negativeFraction must not be a number (should throw exception!?)",
495-
jsonObject.get( "negativeFraction" ) instanceof Number );
496-
assertFalse( "negativeHexFloat must not be a number (should throw exception!?)",
497-
jsonObject.get( "negativeHexFloat" ) instanceof Number );
498-
assertFalse( "hexFloat must not be a number (should throw exception!?)",
499-
jsonObject.get( "hexFloat" ) instanceof Number );
500-
assertFalse( "floatIdentifier must not be a number (should throw exception!?)",
501-
jsonObject.get( "floatIdentifier" ) instanceof Number );
502-
assertFalse( "doubleIdentifier must not be a number (should throw exception!?)",
503-
jsonObject.get( "doubleIdentifier" ) instanceof Number );
502+
obj instanceof Number );
503+
assertTrue("hexNumber currently evaluates to string",
504+
obj.equals("-0x123"));
505+
assertTrue( "tooManyZeros currently evaluates to string",
506+
jsonObject.get( "tooManyZeros" ).equals("00"));
507+
obj = jsonObject.get("negativeInfinite");
508+
assertTrue( "negativeInfinite currently evaluates to string",
509+
obj.equals("-Infinity"));
510+
obj = jsonObject.get("negativeNaN");
511+
assertTrue( "negativeNaN currently evaluates to string",
512+
obj.equals("-NaN"));
513+
assertTrue( "negativeFraction currently evaluates to double -0.01",
514+
jsonObject.get( "negativeFraction" ).equals(new Double(-0.01)));
515+
assertTrue( "tooManyZerosFraction currently evaluates to double 0.001",
516+
jsonObject.get( "tooManyZerosFraction" ).equals(new Double(0.001)));
517+
assertTrue( "negativeHexFloat currently evaluates to double -3.99951171875",
518+
jsonObject.get( "negativeHexFloat" ).equals(new Double(-3.99951171875)));
519+
assertTrue("hexFloat currently evaluates to double 4.9E-324",
520+
jsonObject.get("hexFloat").equals(new Double(4.9E-324)));
521+
assertTrue("floatIdentifier currently evaluates to double 0.1",
522+
jsonObject.get("floatIdentifier").equals(new Double(0.1)));
523+
assertTrue("doubleIdentifier currently evaluates to double 0.1",
524+
jsonObject.get("doubleIdentifier").equals(new Double(0.1)));
504525
}
505526

506527
@Test
@@ -935,10 +956,14 @@ public void wrapObject() {
935956
assertTrue("Integer wrap() incorrect",
936957
in == JSONObject.wrap(in));
937958

938-
// wrap(BigDecimal) returns BigDecimal
939-
BigDecimal bd = BigDecimal.ONE;
940-
assertTrue("BigDecimal wrap() incorrect",
941-
bd == JSONObject.wrap(bd));
959+
/**
960+
* This test is to document the preferred behavior if BigDecimal is
961+
* supported. At the present time, bd returns as a string, since it
962+
* is recognized as being a Java package class.
963+
*/
964+
Object bdWrap = JSONObject.wrap(BigDecimal.ONE);
965+
assertTrue("BigDecimal.ONE currently evaluates to string",
966+
bdWrap.equals("1"));
942967

943968
// wrap JSONObject returns JSONObject
944969
String jsonObjectStr =

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