Simplify fuzz test

src/fuzz.cpp

@@ -1,46 +1,42 @@
 #include "minify.h"
 #include "parser3.h"
 
-void testStreaming(std::string const &json) {
-  MinifyState streaming;
-  MinifyState batch;
+std::pair<std::string, parser3::Status> runStreaming(std::string copy) {
+  MinifyState state;
   auto c = minifyCallbacks();
-  parser3::Status streamingStatus = parser3::S_OK;
-  parser3::Status batchStatus = parser3::S_OK;
-  do {
-    auto copy = json;
-    parser3::Parser3 parser(&c, &streaming);
+  parser3::Parser3 parser(&c, &state);
   for (int i = 0; i < copy.size(); ++i) {
     auto s = parser.parse(copy.data() + i, 1);
     if (s != parser3::S_AGAIN) {
-        streamingStatus = s;
-        break;
+      return {state.result, s};
     }
   }
   auto s = parser.parse(nullptr, 0);
   if (s != parser3::S_OK) {
-      streamingStatus = s;
-      break;
+    return {state.result, s};
   }
-  } while (0);
-  do {
-    auto copy = json;
-    parser3::Parser3 parser(&c, &batch);
+  return {state.result, parser3::S_OK};
+}
+
+std::pair<std::string, parser3::Status> runBatch(std::string copy) {
+  MinifyState state;
+  auto c = minifyCallbacks();
+  parser3::Parser3 parser(&c, &state);
   auto s = parser.parse(copy.data(), copy.size());
   if (s != parser3::S_AGAIN) {
-      batchStatus = s;
-      break;
+    return {state.result, s};
   }
   s = parser.parse(nullptr, 0);
   if (s != parser3::S_OK) {
-      batchStatus = s;
-      break;
+    return {state.result, s};
   }
-  } while (0);
-  if (streamingStatus != batchStatus) {
-    abort();
-  }
-  if (streaming.result != batch.result) {
+  return {state.result, parser3::S_OK};
+}
+
+void testStreaming(std::string const &json) {
+  auto result1 = runStreaming(json);
+  auto result2 = runBatch(json);
+  if (result1 != result2) {
     abort();
   }
 }