serialize boolean in JSON to "true/false" instead of "0/1"

Change-Id: I90cf519c00eaf9ccd9fcab8035a91b9205587c3b

src/idl_gen_text.cpp

@@ -60,7 +60,12 @@ template<typename T> void Print(T val, Type type, int /*indent*/,
       return;
     }
   }
-  text += NumToString(val);
+
+  if (type.base_type == BASE_TYPE_BOOL) {
+    text += val ? "true" : "false";
+  } else {
+    text += NumToString(val);
+  }
 }
 
 // Print a vector a sequence of JSON values, comma separated, wrapped in "[]".

tests/test.cpp

@@ -635,6 +635,11 @@ void FuzzTest2() {
             Dummy();
           }
           break;
+        case flatbuffers::BASE_TYPE_BOOL:
+          AddToSchemaAndInstances("bool", deprecated
+                                  ? ""
+                                  : (lcg_rand() % 2 ? "true" : "false"));
+          break;
         default:
           // All the scalar types.
           schema += flatbuffers::kTypeNames[base_type];