232   BIO *bio1, *bio2;  in TEST_P()  local
233   ASSERT_TRUE(BIO_new_bio_pair(&bio1, 10, &bio2, 10));  in TEST_P()
234   bssl::UniquePtr<BIO> free_bio1(bio1), free_bio2(bio2);  in TEST_P()
237     std::swap(bio1, bio2);  in TEST_P()
241   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
242   EXPECT_EQ(0u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
246   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
247   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
250   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
253   EXPECT_EQ(10, BIO_write(bio1, "1234567890___", 13));  in TEST_P()
254   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
255   EXPECT_EQ(-1, BIO_write(bio1, "z", 1));  in TEST_P()
256   EXPECT_TRUE(BIO_should_write(bio1));  in TEST_P()
259   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
264   EXPECT_EQ(5u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
269   EXPECT_EQ(10u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
272   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
273   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
274   EXPECT_EQ(5, BIO_write(bio1, "67890___", 8));  in TEST_P()
275   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
278   EXPECT_EQ(3u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
281   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
284   EXPECT_EQ(0u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
288   EXPECT_EQ(8, BIO_write(bio1, "abcdefgh", 8));  in TEST_P()
289   EXPECT_EQ(2u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
292   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
293   EXPECT_EQ(5, BIO_write(bio1, "ijklm___", 8));  in TEST_P()
294   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
297   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
300   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
304   ASSERT_EQ(5, BIO_read(bio1, buf, sizeof(buf)));  in TEST_P()
308   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
309   EXPECT_TRUE(BIO_shutdown_wr(bio1));  in TEST_P()
315   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
316   EXPECT_EQ(-1, BIO_write(bio1, "_____", 5));  in TEST_P()
324   ASSERT_EQ(5, BIO_read(bio1, buf, sizeof(buf)));  in TEST_P()