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@@ -0,0 +1,19 @@
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+/**
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+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
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+ * For licensing, see LICENSE.md.
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+ */
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+
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+/* global window */
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+
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+import isWindow from '../../src/dom/iswindow';
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+
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+describe( 'isWindow()', () => {
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+ it( 'detects DOM Window', () => {
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+ expect( isWindow( window ) ).to.be.true;
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+ expect( isWindow( {} ) ).to.be.false;
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+ expect( isWindow( null ) ).to.be.false;
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+ expect( isWindow( undefined ) ).to.be.false;
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+ expect( isWindow( new Date() ) ).to.be.false;
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+ expect( isWindow( 42 ) ).to.be.false;
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+ } );
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+} );
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