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var test = require('tape');
var hasSymbols = require('has-symbols/shams')();
var utilInspect = require('../util.inspect');
var repeat = require('string.prototype.repeat');
var inspect = require('..');
test('inspect', function (t) {
t.plan(5);
var obj = [{ inspect: function xyzInspect() { return '!XYZ¡'; } }, []];
var stringResult = '[ !XYZ¡, [] ]';
var falseResult = '[ { inspect: [Function: xyzInspect] }, [] ]';
t.equal(inspect(obj), stringResult);
t.equal(inspect(obj, { customInspect: true }), stringResult);
t.equal(inspect(obj, { customInspect: 'symbol' }), falseResult);
t.equal(inspect(obj, { customInspect: false }), falseResult);
t['throws'](
function () { inspect(obj, { customInspect: 'not a boolean or "symbol"' }); },
TypeError,
'`customInspect` must be a boolean or the string "symbol"'
);
});
test('inspect custom symbol', { skip: !hasSymbols || !utilInspect || !utilInspect.custom }, function (t) {
t.plan(4);
var obj = { inspect: function stringInspect() { return 'string'; } };
obj[utilInspect.custom] = function custom() { return 'symbol'; };
var symbolResult = '[ symbol, [] ]';
var stringResult = '[ string, [] ]';
var falseResult = '[ { inspect: [Function: stringInspect]' + (utilInspect.custom ? ', [' + inspect(utilInspect.custom) + ']: [Function: custom]' : '') + ' }, [] ]';
var symbolStringFallback = utilInspect.custom ? symbolResult : stringResult;
var symbolFalseFallback = utilInspect.custom ? symbolResult : falseResult;
t.equal(inspect([obj, []]), symbolStringFallback);
t.equal(inspect([obj, []], { customInspect: true }), symbolStringFallback);
t.equal(inspect([obj, []], { customInspect: 'symbol' }), symbolFalseFallback);
t.equal(inspect([obj, []], { customInspect: false }), falseResult);
});
test('symbols', { skip: !hasSymbols }, function (t) {
t.plan(2);
var obj = { a: 1 };
obj[Symbol('test')] = 2;
obj[Symbol.iterator] = 3;
Object.defineProperty(obj, Symbol('non-enum'), {
enumerable: false,
value: 4
});
if (typeof Symbol.iterator === 'symbol') {
t.equal(inspect(obj), '{ a: 1, [Symbol(test)]: 2, [Symbol(Symbol.iterator)]: 3 }', 'object with symbols');
t.equal(inspect([obj, []]), '[ { a: 1, [Symbol(test)]: 2, [Symbol(Symbol.iterator)]: 3 }, [] ]', 'object with symbols in array');
} else {
// symbol sham key ordering is unreliable
t.match(
inspect(obj),
/^(?:{ a: 1, \[Symbol\(test\)\]: 2, \[Symbol\(Symbol.iterator\)\]: 3 }|{ a: 1, \[Symbol\(Symbol.iterator\)\]: 3, \[Symbol\(test\)\]: 2 })$/,
'object with symbols (nondeterministic symbol sham key ordering)'
);
t.match(
inspect([obj, []]),
/^\[ (?:{ a: 1, \[Symbol\(test\)\]: 2, \[Symbol\(Symbol.iterator\)\]: 3 }|{ a: 1, \[Symbol\(Symbol.iterator\)\]: 3, \[Symbol\(test\)\]: 2 }), \[\] \]$/,
'object with symbols in array (nondeterministic symbol sham key ordering)'
);
}
});
test('maxStringLength', function (t) {
t['throws'](
function () { inspect('', { maxStringLength: -1 }); },
TypeError,
'maxStringLength must be >= 0, or Infinity, not negative'
);
var str = repeat('a', 1e8);
t.equal(
inspect([str], { maxStringLength: 10 }),
'[ \'aaaaaaaaaa\'... 99999990 more characters ]',
'maxStringLength option limits output'
);
t.equal(
inspect(['f'], { maxStringLength: null }),
'[ \'\'... 1 more character ]',
'maxStringLength option accepts `null`'
);
t.equal(
inspect([str], { maxStringLength: Infinity }),
'[ \'' + str + '\' ]',
'maxStringLength option accepts ∞'
);
t.end();
});