Added tests and support for U(1) group

tests/test_space.jl

@@ -0,0 +1,41 @@
+
+import Pkg
+#Pkg.activate("/lhome/ific/a/alramos/s.images/julia/workspace/LatticeGPU")
+Pkg.activate("/home/alberto/code/julia/LatticeGPU")
+using LatticeGPU, BenchmarkTools
+
+
+lp = SpaceParm{4}((8,12,6,6), (8,2,2,3))
+
+function test_point(pt::NTuple{2,Int64}, lp::SpaceParm)
+    ok = true
+    println("Global point: ", global_point(pt, lp))
+    for id in 1:lp.ndim
+        ua, ub = up(pt, id, lp)
+        println("  - UP in id $id: ", global_point((ua,ub), lp))
+        
+        da, db = dw(pt, id, lp)
+        println("  - DW in id $id: ", global_point((da,db), lp), "\n")
+        
+        ua2, ub2, da2, db2 = updw(pt, id, lp)
+        ok = ok && (ua == ua2)
+        ok = ok && (ub == ub2)
+        ok = ok && (da == da2)
+        ok = ok && (db == db2)
+    end
+    return ok
+end
+
+global ok = true
+for i in 1:lp.bsz, j in 1:lp.rsz
+    global ok = ok && test_point((i,j), lp)
+end
+
+if ok
+    println("ALL tests passed")
+else
+    println("ERROR in test")
+end
+    
+println(lp)
+