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x/ramda/test/includes.js

:ram: Practical functional Javascript
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var R = require('../source');var eq = require('./shared/eq');

describe('includes', function() { it('returns true if an element is in a list', function() { eq(R.includes(7, [1, 2, 3, 9, 8, 7, 100, 200, 300]), true); });
it('returns false if an element is not in a list', function() { eq(R.includes(99, [1, 2, 3, 9, 8, 7, 100, 200, 300]), false); });
it('returns false for the empty list', function() { eq(R.includes(1, []), false); });
it('has R.equals semantics', function() { function Just(x) { this.value = x; } Just.prototype.equals = function(x) { return x instanceof Just && R.equals(x.value, this.value); };
eq(R.includes(0, [-0]), false); eq(R.includes(-0, [0]), false); eq(R.includes(NaN, [NaN]), true); eq(R.includes(new Just([42]), [new Just([42])]), true); });
it('returns true if substring is part of string', function() { eq(R.includes('ba', 'banana'), true); });
});