Improve test coverage.
* Test equality of different length strings. * Add tab to json_pack whitespace test. * Test json_sprintf with empty result and invalid UTF. * Test json_get_alloc_funcs with NULL arguments. * Test invalid arguments. * Add test_chaos to test allocation failure code paths. * Remove redundant json_is_string checks from json_string_equal and json_string_copy. Both functions are static and can only be called with a json string. Fixes to issues found by test_chaos: * Fix crash on OOM in pack_unpack.c:read_string(). * Unconditionally free string in string_create upon allocation failure. Update load.c:parse_value() to reflect this. This resolves a leak on allocation failure for pack_unpack.c:pack_string() and value.c:json_sprintf(). Although not visible from CodeCoverage these changes significantly increase branch coverage. Especially in src/value.c where we previously covered 67.4% of branches and now cover 96.3% of branches.
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@@ -74,6 +74,13 @@ static void test_equal_simple()
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fail("unable to create an string");
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if(json_equal(value1, value2))
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fail("json_equal fails for two inequal strings");
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json_decref(value2);
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value2 = json_string("bar2");
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if(!value2)
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fail("unable to create an string");
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if(json_equal(value1, value2))
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fail("json_equal fails for two inequal length strings");
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json_decref(value1);
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json_decref(value2);
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