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