Added test for resolving array references in exprresolve (#56471)

added test to take care of non-real-index handling while resolving array
references in exprresolve to test julia/base/cartesian.jl - line 427 to
432

Author: Priynsh

test/cartesian.jl

@@ -1,12 +1,20 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-@test Base.Cartesian.exprresolve(:(1 + 3)) == 4
+
 ex = Base.Cartesian.exprresolve(:(if 5 > 4; :x; else :y; end))
 @test ex.args[2] == QuoteNode(:x)
 
 @test Base.Cartesian.lreplace!("val_col", Base.Cartesian.LReplace{String}(:col, "col", 1)) == "val_1"
 @test Base.setindex(CartesianIndex(1,5,4),3,2) == CartesianIndex(1, 3, 4)
-
+@testset "Expression Resolve" begin
+    @test Base.Cartesian.exprresolve(:(1 + 3)) == 4
+    ex1 = Expr(:ref, [1, 2, 3], 2)
+    result1 = Base.Cartesian.exprresolve(ex1)
+    @test result1 == 2
+    ex2 = Expr(:ref, [1, 2, 3], "non-real-index")
+    result2 = Base.Cartesian.exprresolve(ex2)
+    @test result2 == ex2
+end
 @testset "CartesianIndices constructions" begin
     @testset "AbstractUnitRange" begin
         for oinds in [