52 lines
1.3 KiB
Java
52 lines
1.3 KiB
Java
/**
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package com.facebook.csslayout;
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import org.junit.Test;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNull;
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/**
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* Tests for {@link CSSNode}.
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*/
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public class CSSNodeTest {
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@Test
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public void testAddChildGetParent() {
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CSSNode parent = new CSSNode();
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CSSNode child = new CSSNode();
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assertNull(child.getParent());
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assertEquals(0, parent.getChildCount());
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parent.addChildAt(child, 0);
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assertEquals(1, parent.getChildCount());
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assertEquals(child, parent.getChildAt(0));
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assertEquals(parent, child.getParent());
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parent.removeChildAt(0);
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assertNull(child.getParent());
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assertEquals(0, parent.getChildCount());
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}
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@Test(expected = IllegalStateException.class)
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public void testCannotAddChildToMultipleParents() {
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CSSNode parent1 = new CSSNode();
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CSSNode parent2 = new CSSNode();
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CSSNode child = new CSSNode();
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parent1.addChildAt(child, 0);
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parent2.addChildAt(child, 0);
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}
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}
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