public void ContainsExpress_ReturnsTrueIfContainsExpression()
{
ExpressionTree tree = new ExpressionTree();
var expr = new MockExpression(1);
tree.AddExpression(expr);
Assert.True(tree.ContainsExpression(expr));
}
public void ContainsExpression_ThrowsArgumentNullException()
{
ExpressionTree tree = new ExpressionTree();
Assert.Throws<ArgumentNullException>(() => tree.ContainsExpression(null));
}
public void ContainsExpression_ReturnsFalseIfDoesntContainExpression()
{
ExpressionTree tree = new ExpressionTree();
Assert.False(tree.ContainsExpression(new MockExpression(1)));
}
