code: def test_Declaration():
      u = symbols("u", real=True)
      vu = Variable(u, type=Type.from_expr(u))
      assert Declaration(vu).variable.type == real
      vn = Variable(n, type=Type.from_expr(n))
      assert Declaration(vn).variable.type == integer
  
      # PR 19107, does not allow comparison between expressions and Basic
      # lt = StrictLessThan(vu, vn)
      # assert isinstance(lt, StrictLessThan)
  
      vuc = Variable(
          u, Type.from_expr(u), value=3.0, attrs={value_const}
      )
      assert value_const in vuc.attrs
      assert pointer_const not in vuc.attrs
      decl = Declaration(vuc)
      assert decl.variable == vuc
      assert isinstance(decl.variable.value, Float)
      assert decl.variable.value == 3.0
      assert decl.func(*decl.args) == decl
      assert vuc.as_Declaration() == decl
      assert vuc.as_Declaration(value=None, attrs=None) == Declaration(
          vu
      )
  
      vy = Variable(y, type=integer, value=3)
      decl2 = Declaration(vy)
      assert decl2.variable == vy
      assert decl2.variable.value == Integer(3)
  
      vi = Variable(i, type=Type.from_expr(i), value=3.0)
      decl3 = Declaration(vi)
      assert decl3.variable.type == integer
      assert decl3.variable.value == 3.0
  
      raises(ValueError, lambda: Declaration(vi, 42))
  
imports: import math
  from sympy.core.containers import Tuple
  from sympy.core.numbers import nan, oo, Float, Integer
  from sympy.core.relational import Lt
  from sympy.core.symbol import symbols, Symbol
  from sympy.functions.elementary.trigonometric import sin
  from sympy.matrices.dense import Matrix
  from sympy.matrices.expressions.matexpr import MatrixSymbol
  from sympy.sets.fancysets import Range
  from sympy.tensor.indexed import Idx, IndexedBase
  from sympy.testing.pytest import raises
  from sympy.codegen.ast import Assignment, Attribute, aug_assign, CodeBlock, For, Type, Variable, Pointer, Declaration, AddAugmentedAssignment, SubAugmentedAssignment, MulAugmentedAssignment, DivAugmentedAssignment, ModAugmentedAssignment, value_const, pointer_const, integer, real, complex_, int8, uint8, float16, float32, float64, float80, float128, complex64, complex128, While, Scope, String, Print, QuotedString, FunctionPrototype, FunctionDefinition, Return, FunctionCall, untyped, IntBaseType, intc, Node, none, NoneToken, Token, Comment
label_desc: Use image node_id 20 for calling a global function with example usage: test_Declaration() without return types