public void BeginExpression_WhenGivenAToken_PushesExpressionNode()
{
// Arrange:
var token = new Token {
TokenKind = TokenKind.String, Image = "<T>"
};
var stack = new Stack <IAstNode>();
stack.Push(_nodeFactoryMock.Object.Create(AstNodeType.Syntax, token));
var builder = new AstBuilder(_nodeFactoryMock.Object, _prodInfoFactoryMock.Object, stack, _tracerMock.Object);
// Act:
builder.BeginExpression(token);
// Assert:
Assert.That(stack.Count, Is.EqualTo(2));
Assert.That(stack.Peek(), Is.InstanceOf(typeof(IExpressionNode)));
Assert.That((stack.Peek() as IExpressionNode)?.Image, Is.EqualTo(token.Image));
Assert.That((stack.Peek() as IExpressionNode)?.Terms.Count, Is.EqualTo(0));
}
