158   file read_end, write_end;  in open_file()  local
159   file::pipe(read_end, write_end);  in open_file()
162   return read_end;  in open_file()
447   file read_end, write_end;  in TEST()  local
448   file::pipe(read_end, write_end);  in TEST()
451   EXPECT_READ(read_end, "test");  in TEST()
509   file read_end, write_end;  in TEST()  local
510   file::pipe(read_end, write_end);  in TEST()
511   EXPECT_NE(-1, read_end.descriptor());  in TEST()
514   EXPECT_READ(read_end, "test");  in TEST()
518   file read_end, write_end;  in TEST()  local
519   file::pipe(read_end, write_end);  in TEST()
520   int read_fd = read_end.descriptor();  in TEST()
521   EXPECT_EQ(read_fd, FMT_POSIX(fileno(read_end.fdopen("r").get())));  in TEST()