Added 4 (fuel only), tests type 2.

galaxy.cpp

@@ -83,7 +83,11 @@ int trade_type(port_type port1, port_type port2) {
     return 2;
   }
 
-  if (matches == 1) return 3;
+  if (matches == 1) {
+    if (inv2.foe[FUEL])
+      return 4;
+    return 3;
+  }
   return 0;
 }
 

test-galaxy.cpp

@@ -122,7 +122,11 @@ TEST(ports, trade_types) {
   expected[pair{4, 5}] = 1;
 
   // I'm checking 0's and 1's.
-  
+  expected[pair{1,3}] = 2;
+  expected[pair{2,3}] = 2;
+  expected[pair{4,6}] = 2;
+  expected[pair{5,6}] = 2;
+
   /*
   GTEST_COUT << "size:" << expected.size() << std::endl;
 
@@ -136,7 +140,7 @@ TEST(ports, trade_types) {
 
   for (int p1 = 1; p1 <= 8; ++p1) {
     for (int p2 = p1; p2 <= 8; ++p2) {
-      GTEST_COUT << "Type " << p1 << " and " << p2 << std::endl;
+      // GTEST_COUT << "Type " << p1 << " and " << p2 << std::endl;
       int t = trade_type(p1, p2);
       int t2 = trade_type(p2, p1);
       EXPECT_EQ(t, t2) << "Comparing reversed types";