Basic JSON conformance

These sets of tests check some of the basic JSON functionality. Most JSON modules should easily pass these.

Converting Python to JSON

The first set of tests are for encoding basic Python objects to JSON. Since JSON requires that the top-level object must be either a lsit or a dictionary; all Python values are included in a list so the JSON requirements can be satisfied.

Table 1: Basic Python to JSON

Test#	from Python	to JSON	demjson	jsonlib	python-cjson	python-json	simplejson
1–1	[]	[]	yes	yes	yes	yes	yes
1–2	[42]	[42]	yes	yes, outputs: [42L]	yes	yes	yes
1–3	[True]	[true]	yes	yes	yes	yes	yes
1–4	[False]	[false]	yes	yes	yes	yes	yes
1–5	[None]	[null]	yes	yes	yes	yes	yes
1–6	["hello"]	["hello"]	yes	yes	yes	yes	yes
1–7	()	[]	yes	yes	yes	yes	yes
1–8	{}	{}	yes	yes	yes	yes	yes
1–9	{"a":7}	{"a":7}	yes	yes	yes	yes	yes

Converting JSON to Python

When converting from JSON, we test the demjson module in both its strict mode as well as its loose mode to show the difference in behavior.

These tests are for decoding JSON objects into Python. Since JSON requires that the top-level object must be either a list or a dictionary; all the JSON values are encoded as such.

Table 2: Basic JSON to Python

Test#	from JSON	to Python	demjson/strict	demjson/loose	jsonlib	python-cjson	python-json	simplejson
2–1	[]	[]	yes	yes	yes	yes	yes	yes
2–2	[true]	[True]	yes	yes	yes	yes	yes	yes
2–3	[false]	[False]	yes	yes	yes	yes	yes	yes
2–4	[null]	[None]	yes	yes	yes	yes	yes	yes
2–5	[42]	[42]	yes	yes	yes	yes	yes	yes
2–6	["hello"]	['hello']	yes	yes	yes	yes	yes	yes
2–7	{}	{}	yes	yes	yes	yes	yes	yes
2–8	{"a":7}	{'a':7}	yes	yes	yes	yes	yes	yes

The following tests see how strictly the JSON parsers are in allowing input that is not valid JSON, yet is still valid JavaScript. A correct implementation must either raise an error, or must convert the value with semantics equivalent to JavaScript's.

Table 3: Invalid JSON but valid JavaScript to Python

Test#	Invalid JSON, Legal JavaScript	demjson/strict	demjson/loose	jsonlib	python-cjson	python-json	simplejson
3–1		yes: error	yes: error	yes: error	yes: error	yes: error	yes: error
3–2	42	yes: error	almost, outputs: 42	almost, outputs: 42L	almost, outputs: 42	almost, outputs: 42	almost, outputs: 42
3–3	"abc"	yes: error	almost, outputs: 'abc'	almost, outputs: 'abc'	almost, outputs: 'abc'	almost, outputs: 'abc'	almost, outputs: 'abc'
3–4	[1,]	yes: error	almost, outputs: [1]	yes: error	yes: error	yes: error	yes: error
3–5	[1,,2]	yes: error	almost, outputs: [1,demjson.unde fined,2]	yes: error	yes: error	yes: error	yes: error
3–6	[undefined]	yes: error	almost, outputs: [demjson.undefi ned]	yes: error	yes: error	yes: error	yes: error
3–7	['abc']	yes: error	almost, outputs: ["abc"]	yes: error	yes: error	yes: error	yes: error
3–8	{abc:42}	yes: error	almost, outputs: {"abc":42}	yes: error	yes: error	yes: error	yes: error
3–9	{_a_z:42}	yes: error	almost, outputs: {"_a_z":42}	yes: error	yes: error	yes: error	yes: error
3–10	{$x_:42}	yes: error	almost, outputs: {"$x_":42}	yes: error	yes: error	yes: error	yes: error
3–11	{99:42}	yes: error	almost, outputs: {99:42}	yes: error	yes: error	yes: error	yes: error
3–12	[/*1,*/2]	yes: error	almost, outputs: [2]	yes: error	yes: error	almost, outputs: [2]	yes: error
3–13	[//1, 2]	yes: error	almost, outputs: [2]	yes: error	yes: error	almost, outputs: [2]	yes: error
3–14	[// /*1,*/3, 2]	yes: error	almost, outputs: [2]	yes: error	yes: error	almost, outputs: [2]	yes: error
3–15	[/*1,//*/3, 2]	yes: error	yes: error	yes: error	yes: error	yes: error	yes: error

The following tests use input that is both invalid JSON as well as invalid JavaScript. A compliant parser should always result in an error.

Table 4: Invalid JSON and invalid JavaScript to Python

Test#	Invalid JSON, Invalid JavaScript	demjson/strict	demjson/loose	jsonlib	python-cjson	python-json	simplejson
4–1	{null:42}	yes: error	yes: error	yes: error	yes: error	yes: error	yes: error
4–2	{true:42}	yes: error	yes: error	yes: error	yes: error	yes: error	yes: error

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