test(topology): add wedges test

Test file included in main test/runtests.jl
Tests wedge element topology

test/topology/test_wedges.jl

@@ -0,0 +1,30 @@
+# This file is a part of JuliaFEM.
+# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
+
+using JuliaFEM
+using Test
+using StaticArrays
+
+@testset "Wedge Elements" begin
+    @testset "Wedge{6}" begin
+        @test nnodes(Wedge{6}()) == 6
+        @test dim(Wedge{6}()) == 3
+        @test nvertices(Wedge{6}()) == 6
+        @test nedges(Wedge{6}()) == 9
+        @test nfaces(Wedge{6}()) == 5
+        
+        # Entity counts
+        @test nentities(Wedge{6}, Vertex) == 6
+        @test nentities(Wedge{6}, Edge) == 9
+        @test nentities(Wedge{6}, Face) == 5
+        @test nentities(Wedge{6}, Cell) == 1
+    end
+    
+    @testset "Wedge{15}" begin
+        @test nnodes(Wedge{15}()) == 15
+        @test nvertices(Wedge{15}()) == 6  # Same topology
+        @test nedges(Wedge{15}()) == 9
+        @test nfaces(Wedge{15}()) == 5
+        @test nentities(Wedge{15}, Edge) == 9
+    end
+end