public void Parse_PlusExpression_ReturnsCorrectTree()
{
string text = "1+2";
ExpressionTree tree = ExpressionTree.Parse(text);
AssertingEnumerator enumerator = new AssertingEnumerator(tree.Root.Expression);
// +
// / \
// 1 2
enumerator.AssertNode(NodeKind.BinaryExpression);
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "1");
enumerator.AssertToken(NodeKind.PlusToken, TestingHelper.GetNodeKindText(NodeKind.PlusToken));
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "2");
}
public void Parse_AssignmentExpression_ReturnsCorrectTree()
{
string text = "a = 1";
ExpressionTree tree = ExpressionTree.Parse(text);
AssertingEnumerator enumerator = new AssertingEnumerator(tree.Root.Expression);
// =
// / \
// a 1
enumerator.AssertNode(NodeKind.AssignmentExpression);
enumerator.AssertNode(NodeKind.IdentifierExpression);
enumerator.AssertToken(NodeKind.IdentifierToken, "a");
enumerator.AssertToken(NodeKind.EqualsToken, TestingHelper.GetNodeKindText(NodeKind.EqualsToken));
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "1");
}
public void Parse_ParenthesizedExpression_ReturnsCorrectTree()
{
string text = "(1+2)*5";
ExpressionTree tree = ExpressionTree.Parse(text);
AssertingEnumerator enumerator = new AssertingEnumerator(tree.Root.Expression);
// *
// / \
// + 5
// / \
// 1 2
enumerator.AssertNode(NodeKind.BinaryExpression);
enumerator.AssertNode(NodeKind.ParenthesizedExpression);
enumerator.AssertToken(NodeKind.OpenParenthesisToken, TestingHelper.GetNodeKindText(NodeKind.OpenParenthesisToken));
enumerator.AssertNode(NodeKind.BinaryExpression);
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "1");
enumerator.AssertToken(NodeKind.PlusToken, TestingHelper.GetNodeKindText(NodeKind.PlusToken));
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "2");
enumerator.AssertToken(NodeKind.CloseParenthesisToken, TestingHelper.GetNodeKindText(NodeKind.CloseParenthesisToken));
enumerator.AssertToken(NodeKind.StarToken, TestingHelper.GetNodeKindText(NodeKind.StarToken));
enumerator.AssertNode(NodeKind.LiteralExpression);
enumerator.AssertToken(NodeKind.NumberToken, "5");
}
