229   BIO *bio1, *bio2;  in TEST_P()  local
230   ASSERT_TRUE(BIO_new_bio_pair(&bio1, 10, &bio2, 10));  in TEST_P()
231   bssl::UniquePtr<BIO> free_bio1(bio1), free_bio2(bio2);  in TEST_P()
234     std::swap(bio1, bio2);  in TEST_P()
238   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
239   EXPECT_EQ(0u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
243   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
244   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
247   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
250   EXPECT_EQ(10, BIO_write(bio1, "1234567890___", 13));  in TEST_P()
251   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
252   EXPECT_EQ(-1, BIO_write(bio1, "z", 1));  in TEST_P()
253   EXPECT_TRUE(BIO_should_write(bio1));  in TEST_P()
256   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
261   EXPECT_EQ(5u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
266   EXPECT_EQ(10u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
269   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
270   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
271   EXPECT_EQ(5, BIO_write(bio1, "67890___", 8));  in TEST_P()
272   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
275   EXPECT_EQ(3u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
278   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
281   EXPECT_EQ(0u, BIO_ctrl_get_read_request(bio1));  in TEST_P()
285   EXPECT_EQ(8, BIO_write(bio1, "abcdefgh", 8));  in TEST_P()
286   EXPECT_EQ(2u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
289   EXPECT_EQ(5u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
290   EXPECT_EQ(5, BIO_write(bio1, "ijklm___", 8));  in TEST_P()
291   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
294   EXPECT_EQ(10u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
297   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
301   ASSERT_EQ(5, BIO_read(bio1, buf, sizeof(buf)));  in TEST_P()
305   EXPECT_EQ(5, BIO_write(bio1, "12345", 5));  in TEST_P()
306   EXPECT_TRUE(BIO_shutdown_wr(bio1));  in TEST_P()
312   EXPECT_EQ(0u, BIO_ctrl_get_write_guarantee(bio1));  in TEST_P()
313   EXPECT_EQ(-1, BIO_write(bio1, "_____", 5));  in TEST_P()
321   ASSERT_EQ(5, BIO_read(bio1, buf, sizeof(buf)));  in TEST_P()