public void OpenXmlElementTraversingMethodsTest()
{
Paragraph para = new Paragraph();
Run r1 = para.AppendChild(new Run());
Bold b1 = r1.AppendChild(new RunProperties()).AppendChild(new Bold());
Text t1 = r1.AppendChild(new Text());
Run r2 = para.AppendChild(new Run());
r2.AppendChild(new Text());
Run r3 = para.AppendChild(new Run());
Assert.Equal(7, para.Descendants().Count());
Assert.Equal(3, r1.Descendants().Count());
Assert.Single(r2.Descendants());
Assert.Empty(r3.Descendants());
Assert.Same(r1, para.Descendants().First());
Assert.Same(b1, para.Descendants().ElementAt(2));
Assert.Same(t1, para.Descendants().ElementAt(3));
Assert.Same(r2, para.Descendants().ElementAt(4));
Assert.Same(r3, para.Descendants().Last());
// ancestors
Assert.Empty(para.Ancestors());
Assert.Empty(para.Ancestors <Body>());
Assert.Single(r1.Ancestors());
Assert.Single(r1.Ancestors <Paragraph>());
Assert.Empty(r1.Ancestors <Body>());
Assert.Single(r3.Ancestors());
Assert.Single(r3.Ancestors <Paragraph>());
Assert.Empty(r3.Ancestors <Body>());
Assert.Equal(2, t1.Ancestors().Count());
Assert.Single(t1.Ancestors <Paragraph>());
Assert.Empty(t1.Ancestors <Body>());
Assert.Equal(3, b1.Ancestors().Count());
Assert.Single(b1.Ancestors <Paragraph>());
Assert.Single(b1.Ancestors <Run>());
Assert.Single(b1.Ancestors <RunProperties>());
Assert.Empty(b1.Ancestors <Body>());
Assert.Same(para, r1.Ancestors().First());
Assert.Same(para, r1.Ancestors <Paragraph>().First());
Assert.Same(r1, t1.Ancestors().First());
Assert.Same(para, t1.Ancestors().Last());
Assert.Same(r1, t1.Ancestors <Run>().First());
Assert.Same(para, t1.Ancestors <Paragraph>().First());
Assert.Same(para, b1.Ancestors().Last());
Assert.Same(r1, b1.Ancestors().ElementAt(1));
// IsBefore() / IsAfter()
Assert.False(para.IsBefore(para));
Assert.False(para.IsAfter(para));
Assert.False(r2.IsBefore(r2));
Assert.False(r2.IsAfter(r2));
Assert.True(para.IsBefore(r1));
Assert.False(para.IsAfter(r1));
Assert.True(para.IsBefore(b1));
Assert.False(para.IsAfter(b1));
Assert.False(r1.IsBefore(para));
Assert.True(r1.IsAfter(para));
Assert.False(r1.IsBefore(para));
Assert.True(r1.IsAfter(para));
Assert.True(r1.IsBefore(r2));
Assert.False(r1.IsAfter(r2));
Assert.False(r3.IsBefore(r1));
Assert.True(r3.IsAfter(r1));
Assert.False(b1.IsAfter(r2));
Assert.True(b1.IsBefore(r2));
Assert.True(r1.IsBefore(b1));
Assert.False(r1.IsAfter(b1));
Assert.True(b1.IsAfter(r1));
Assert.False(b1.IsBefore(r1));
Paragraph p2 = new Paragraph();
Run p2r1 = p2.AppendChild(new Run());
Assert.False(p2.IsBefore(para));
Assert.False(p2.IsAfter(para));
Assert.False(p2r1.IsAfter(para));
Assert.False(p2r1.IsBefore(para));
// ElementsBefore / ElementsAfter
Assert.False(para.ElementsBefore().Any());
Assert.False(para.ElementsAfter().Any());
Assert.True(r1.ElementsAfter().Any());
Assert.False(r1.ElementsBefore().Any());
Assert.False(r3.ElementsAfter().Any());
Assert.True(r3.ElementsBefore().Any());
Assert.True(r2.ElementsAfter().Any());
Assert.True(r2.ElementsBefore().Any());
Assert.Same(r1, r3.ElementsBefore().First());
Assert.Same(r2, r3.ElementsBefore().Last());
Assert.Same(r2, r1.ElementsAfter().First());
Assert.Same(r3, r1.ElementsAfter().Last());
Assert.False(b1.ElementsBefore().Any());
Assert.False(b1.ElementsAfter().Any());
}