ci: test flush

tests/test_simple_union.cpp

@@ -1,39 +1,40 @@
 #include <fstream>
 #include <iostream>
+#include <ostream>
 #include <string>
 
 void union_bytes(std::string &json) {
-  std::cout << "union_bytes 1" << std::endl;
+  std::cout << "union_bytes 1" << std::endl << std::flush;
   if (json[0] == json[1]) {
     printf("matching!\n");
   } else {
     printf("not matching!\n");
   }
-  std::cout << "union_bytes 2" << std::endl;
+  std::cout << "union_bytes 2" << std::endl << std::flush;
 }
 
 int main(int argc, const char *argv[]) {
-  std::cout << "main 1" << std::endl;
+  std::cout << "main 1" << std::endl << std::flush;
   if (argc < 2) {
-    std::cout << "Error! no file supplied!" << std::endl;
+    std::cout << "Error! no file supplied!" << std::endl << std::flush;
     return -1;
   }
   std::ifstream myfile;
-  std::cout << "main 2" << std::endl;
+  std::cout << "main 2" << std::endl << std::flush;
   myfile.open(argv[1]);
-  std::cout << "main 3" << std::endl;
+  std::cout << "main 3" << std::endl << std::flush;
   std::string line;
   std::string json;
-  std::cout << "main 4" << std::endl;
+  std::cout << "main 4" << std::endl << std::flush;
   if (myfile.is_open()) {
     while (getline(myfile, line)) {
       json += line + '\n';
     }
     union_bytes(json);
   } else {
-    std::cout << "FAILED TO OPEN DATA" << std::endl;
+    std::cout << "FAILED TO OPEN DATA" << std::endl << std::flush;
     return -1;
   }
-  std::cout << "main 5" << std::endl;
-  return 0;
+  std::cout << "main 5" << std::endl << std::flush;
+  return -1;
 }