End of Day; Add topology generation and iterators

test/qft.jl

@@ -0,0 +1,23 @@
+using FeynmanDiagramGenerator
+
+import FeynmanDiagramGenerator.QFT
+
+@testset "QED" begin
+    theory = QED
+
+    for (p1, p2, p3, b) in [
+        (Electron(), Positron(), Photon(), true),
+        (Muon(), AntiMuon(), Photon(), true),
+        (Tauon(), AntiTauon(), Photon(), true),
+        (Electron(), Positron(), Positron(), false),
+        (Electron(), AntiMuon(), Photon(), false),
+        (Electron(), Positron(), ZBoson(), false)
+    ]
+        @test can_interact(theory, p1, p2, p3) == b
+        @test can_interact(theory, p1, p2, p3) == b
+        @test can_interact(theory, p2, p1, p3) == b
+        @test can_interact(theory, p2, p3, p1) == b
+        @test can_interact(theory, p3, p1, p2) == b
+        @test can_interact(theory, p3, p2, p1) == b
+    end
+end

test/runtests.jl

@@ -3,3 +3,7 @@ using SafeTestsets
 @safetestset "Trees" begin
     include("trees.jl")
 end
+
+@safetestset "QFT" begin
+    include("qft.jl")
+end