public void ContainsExpress_ReturnsTrueIfContainsExpression()
{
ExpressionTree tree = new ExpressionTree();
var expr = new MockExpression(1);
tree.AddExpression(expr);
Assert.True(tree.ContainsExpression(expr));
}
public void AddExpression_AddsExpression()
{
ExpressionTree tree = new ExpressionTree();
MockExpression expr = new MockExpression(1);
tree.AddExpression(expr);
Assert.NotEmpty(tree.rootNode.Children);
Assert.NotNull(tree.rootNode.Children.FirstOrDefault());
Assert.Equal(expr, tree.rootNode.Children.Select(c => c as ExpressionNode).FirstOrDefault(c => c != null).Expression);
}