Add tests for offset integers

Author: Sov-trotter

test/runtests.jl

@@ -421,5 +421,35 @@ end
     @test found && point ≈ Point(0.0, 4.0)
     @test intersects(a, f) === (false, Point(0.0, 0.0))
 end
+@testset "Offsetintegers" begin
+    x = 1
+    @test GeometryBasics.raw(x) isa Int64
+    @test GeometryBasics.value(x) == x
+
+    x = ZeroIndex(1)
+    @test eltype(x) == Int64
+
+    x = OffsetInteger{0}(1)
+    @test typeof(x) == OffsetInteger{0,Int64}
+
+    x1 = OffsetInteger{0}(2)
+    @test GeometryBasics.pure_max(x, x1) == x1
+    @test promote_rule(typeof(x), typeof(x1)) == OffsetInteger{0,Int64}
+    x2 = 1
+    @test promote_rule(typeof(x2), typeof(x1)) == Int64
+    @test Base.to_index(x1) == 2
+    @test -(x1) == OffsetInteger{0,Int64}(-2)
+    @test abs(x1) == OffsetInteger{0,Int64}(2)
+    @test +(x, x1) == OffsetInteger{0,Int64}(3)
+    @test *(x, x1) == OffsetInteger{0,Int64}(2)
+    @test -(x, x1) == OffsetInteger{0,Int64}(-1)
+    #test for /
+    @test div(x, x1) == OffsetInteger{0,Int64}(0)
+    @test ==(x, x1) 
+    @test >=(x, x1) 
+    @test <=(x, x1)
+    @test !>(x, x1)
+    @test !<(x, x1)
+end
 
 end  # testset "GeometryBasics"