1 files changed, 75 insertions, 0 deletions
diff --git a/Build/source/utils/asymptote/tests/pic/trans.asy b/Build/source/utils/asymptote/tests/pic/trans.asy
new file mode 100644
index 00000000000..9a2e02decfa
--- /dev/null
+++ b/Build/source/utils/asymptote/tests/pic/trans.asy
@@ -0,0 +1,75 @@
+import TestLib;
+
+StartTest("trans");
+
+// Ensure the same test each time.
+srand(3456);
+
+pair randompair()
+{
+  return (unitrand(),unitrand());
+}
+
+path randombox()
+{
+  return box(randompair(), randompair());
+}
+
+// For now, only tests transforms which take axes to axes.
+transform randomtrans()
+{
+  return rotate(90 * (rand() % 4)) * shift(unitrand(), unitrand());
+}
+
+real tolerance = 1e-4;
+
+void testpic(int objs, int trans)
+{
+  path[] pp;
+  picture orig;
+  for (int i = 0; i < objs; ++i) {
+    pp.push(randombox());
+    fill(orig, pp[i]);
+  }
+
+  picture pic = orig;
+  transform t = identity();
+  for (int i = 0; i < trans; ++i)
+  {
+    transform tt = randomtrans();
+    pic = tt * pic;
+    t = tt * t;
+  }
+
+  pair m = pic.userMin2(), M = pic.userMax2();
+  pair pm = min(t * pp), pM = max(t * pp);
+
+  assert(abs(m-pm) < tolerance);
+  assert(abs(M-pM) < tolerance);
+}
+
+for (int i = 0; i < 100; ++i)
+  testpic(1,1);
+for (int i = 0; i < 100; ++i)
+  testpic(1,1);
+for (int i = 0; i < 100; ++i)
+  testpic(3,1);
+for (int i = 0; i < 100; ++i)
+  testpic(1,2);
+for (int i = 0; i < 100; ++i)
+  testpic(2,2);
+for (int i = 0; i < 100; ++i)
+  testpic(3,2);
+for (int i = 0; i < 100; ++i)
+  testpic(3,4);
+for (int i = 0; i < 100; ++i)
+  testpic(1,4);
+for (int i = 0; i < 100; ++i)
+  testpic(2,4);
+for (int i = 0; i < 100; ++i)
+  testpic(3,4);
+for (int i = 0; i < 100; ++i)
+  testpic(3,4);
+
+
+EndTest();