Restructure StreamProxies to use common basis for matching directives

test/ZoneCodeGeneratorLibTests/Parsing/Impl/DefinesStreamProxyTests.cpp

@@ -294,4 +294,48 @@ namespace test::parsing::impl::defines_stream_proxy
 
         REQUIRE(proxy.Eof());
     }
+
+    TEST_CASE("DefinesStreamProxy: Ensure defines in disabled block are ignored", "[parsing][parsingstream]")
+    {
+        const std::vector<std::string> lines
+        {
+            "#ifdef LOLO",
+            "#define hello world",
+            "#endif",
+            "hello"
+        };
+
+        MockParserLineStream mockStream(lines);
+        DefinesStreamProxy proxy(&mockStream);
+
+        ExpectLine(&proxy, 1, "");
+        ExpectLine(&proxy, 2, "");
+        ExpectLine(&proxy, 3, "");
+        ExpectLine(&proxy, 4, "hello");
+
+        REQUIRE(proxy.Eof());
+    }
+
+    TEST_CASE("DefinesStreamProxy: Ensure undefs in disabled block are ignored", "[parsing][parsingstream]")
+    {
+        const std::vector<std::string> lines
+        {
+            "#define hello world",
+            "#ifdef LOLO",
+            "#undef hello",
+            "#endif",
+            "hello"
+        };
+
+        MockParserLineStream mockStream(lines);
+        DefinesStreamProxy proxy(&mockStream);
+
+        ExpectLine(&proxy, 1, "");
+        ExpectLine(&proxy, 2, "");
+        ExpectLine(&proxy, 3, "");
+        ExpectLine(&proxy, 4, "");
+        ExpectLine(&proxy, 5, "world");
+
+        REQUIRE(proxy.Eof());
+    }
 }