Tighten some tests.

Author: joto

test/t/tag_and_type/reader_test_cases.cpp

@@ -28,7 +28,7 @@ inline std::vector<uint32_t> read_data(const std::string& data) {
                 }
                 break;
             default:
-                message.skip();
+                REQUIRE(false); // should never be here
         }
     }
 

test/t/vector_tile/reader_test_cases.cpp

@@ -11,6 +11,7 @@ static std::string get_name(protozero::pbf_reader layer) { // copy!
     while (layer.next(1)) { // required string name
         return layer.get_string();
     }
+    REQUIRE(false); // should never be here
     return "";
 }
 
@@ -42,6 +43,7 @@ TEST_CASE("reading vector tiles") {
                 }
             } else {
                 item.skip();
+                REQUIRE(false); // should never be here
             }
         }