TanTan
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74 lines
2.2 KiB
Plaintext
74 lines
2.2 KiB
Plaintext
'use strict';
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var test = require('tape');
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var hasToStringTag = require('has-tostringtag/shams')();
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var inspect = require('object-inspect');
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var isBoolean = require('../');
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test('not Booleans', function (t) {
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t.test('primitives', function (st) {
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// @ts-expect-error
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st.notOk(isBoolean(), 'undefined is not Boolean');
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st.notOk(isBoolean(null), 'null is not Boolean');
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st.notOk(isBoolean(0), '0 is not Boolean');
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st.notOk(isBoolean(NaN), 'NaN is not Boolean');
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st.notOk(isBoolean(Infinity), 'Infinity is not Boolean');
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st.notOk(isBoolean('foo'), 'string is not Boolean');
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st.end();
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});
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t.test('objects', function (st) {
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st.notOk(isBoolean(Object(42)), 'number object is not Boolean');
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st.notOk(isBoolean([]), 'array is not Boolean');
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st.notOk(isBoolean({}), 'object is not Boolean');
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st.notOk(isBoolean(function () {}), 'function is not Boolean');
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st.notOk(isBoolean(/a/g), 'regex literal is not Boolean');
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st.notOk(isBoolean(new RegExp('a', 'g')), 'regex object is not Boolean');
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st.notOk(isBoolean(new Date()), 'new Date() is not Boolean');
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st.end();
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});
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t.end();
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});
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test('@@toStringTag', { skip: !hasToStringTag }, function (t) {
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/** @type {{ toString(): unknown; valueOf(): unknown; [Symbol.toStringTag]?: string; }} */
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var fakeBoolean = {
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toString: function () { return 'true'; },
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valueOf: function () { return true; }
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};
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fakeBoolean[Symbol.toStringTag] = 'Boolean';
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t.notOk(isBoolean(fakeBoolean), 'fake Boolean with @@toStringTag "Boolean" is not Boolean');
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t.end();
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});
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test('Booleans', function (t) {
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t.ok(isBoolean(true), 'true is Boolean');
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t.ok(isBoolean(false), 'false is Boolean');
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t.ok(isBoolean(Object(true)), 'Object(true) is Boolean');
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t.ok(isBoolean(Object(false)), 'Object(false) is Boolean');
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t.end();
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});
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test('Proxy', { skip: typeof Proxy !== 'function' || !hasToStringTag }, function (t) {
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/** @type {Record<PropertyKey, unknown>} */
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var target = {};
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target[Symbol.toStringTag] = 'Boolean';
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var fake = new Proxy(target, { has: function () { return false; } });
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t.equal(
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isBoolean(target),
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false,
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inspect(target) + ' is not a Boolean'
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);
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t.equal(
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isBoolean(fake),
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false,
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inspect(fake) + ' is not a Boolean'
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);
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t.end();
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});
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