From 4e7aadf540136409407637dbbf2492525de65eba Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 31 Mar 2020 18:57:22 +0200
Subject: [PATCH] added tests for bt::normalized_at, and some old tests for
 distances

---
 binary-tiling.cpp |  2 ++
 devmods/tests.cpp | 82 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 devmods/tests.cpp

diff --git a/binary-tiling.cpp b/binary-tiling.cpp
index dc83f0c3..8ea815e9 100644
--- a/binary-tiling.cpp
+++ b/binary-tiling.cpp
@@ -654,6 +654,8 @@ EX namespace bt {
    *
    *  Otherwise: just return h
    *
+   *  See also: in devmods/tests.cpp, -bt-test tests whether this works correctly
+   *
    */
 
   EX transmatrix normalized_at(hyperpoint h) {
diff --git a/devmods/tests.cpp b/devmods/tests.cpp
new file mode 100644
index 00000000..4c05b5e3
--- /dev/null
+++ b/devmods/tests.cpp
@@ -0,0 +1,82 @@
+#include "../hyper.h"
+#include <iostream>
+#include <thread>
+
+namespace hr {
+
+namespace tests {
+
+int readArgs() {
+  using namespace arg;
+           
+  if(0) ;
+  else if(argis("-test-dist")) {
+    start_game();
+    shift(); int d = argi();
+    vector<cell*> l = currentmap->allcells();
+    int errors = 0;
+    int unknown = 0;
+    for(cell *c1: l) if(c1->cpdist <= d)
+    for(cell *c2: l) if(c2->cpdist <= d) {
+      int cd = celldistance(c1, c2);
+      int bcd = bounded_celldistance(c1, c2);
+      if(bcd == DISTANCE_UNKNOWN)
+        unknown++;
+      else if(cd != bcd) {
+        errors++;
+        println(hlog, "distance error: ", tie(c1,c2), " cd = ", cd, " bcd = ", bcd);
+        }
+      }
+
+    int q = 0;
+    for(cell *c: l) if(c->cpdist <= d) q++;
+    
+    println(hlog, "cells checked: ", q, " errors: ", errors, " unknown: ", unknown, " in: ", full_geometry_name());
+    
+    if(errors) exit(1);
+    }
+  else if(argis("-test-bt")) {
+    PHASEFROM(3);
+    for(int i=0; i<gGUARD; i++) {
+      eGeometry g = eGeometry(i);      
+      
+      set_geometry(g);
+      ld aer = bt::area_expansion_rate();
+      if(!aer) continue;
+      
+      // if(cgflags & qDEPRECATED) continue;
+      // if(cgflags & qHYBRID) continue;
+      // if(arb::in() || arcm::in()) continue;
+      // if(!(bt::in() || nonisotropic || among(geometry, gEuclidSquare, 
+
+      println(hlog, "testing geometry: ", ginf[g].menu_displayed_name);
+
+      start_game();      
+
+      int co = bt::expansion_coordinate();
+
+      int cx = (co + 1) % WDIM;
+      int cy = (co + 2) % WDIM;
+      auto oxy = [&] (ld x, ld y, ld z) { hyperpoint h = Hypc; h[co] = z; h[cx] = x; if(WDIM == 3) h[cy] = y; return tC0(bt::normalized_at(h)); };
+      ld shrunk_x = geo_dist(oxy(0,0,-1), oxy(.01,0,-1), iTable);
+      ld shrunk_y = geo_dist(oxy(0,0,-1), oxy(0,.01,-1), iTable);
+      ld expand_x = geo_dist(oxy(0,0,+1), oxy(.01,0,+1), iTable);
+      ld expand_y = geo_dist(oxy(0,0,+1), oxy(0,.01,+1), iTable);
+      if(WDIM == 2) shrunk_y = expand_y = 1;
+      println(hlog, "should be 1: ", lalign(10, (shrunk_x * shrunk_y * bt::area_expansion_rate()) / (expand_x * expand_y)), " : ", tie(shrunk_x, shrunk_y, expand_x, expand_y, aer));
+      if(geometry == gArnoldCat)
+        println(hlog, "(but not in Arnold's cat)");
+      }
+    }
+  else return 1;
+  return 0;
+  }
+
+auto hooks = addHook(hooks_args, 100, readArgs);
+ 
+// Bolza:: genus 2 => Euler characteristic -2
+// octagon: -2/6
+// ~> 6 octagons
+
+}
+}