/* * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2019 SAP SE. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
static size_t print_lorem(outputStream* st) { // Create a ResourceMark just to make sure the stream does not use ResourceArea
ResourceMark rm; staticconstchar* const lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, " "sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lacinia at quis " "risus sed vulputate odio ut enim blandit. Amet risus nullam eget felis eget. Viverra " "orci sagittis eu volutpat odio facilisis mauris sit. Erat velit scelerisque in dictum non."; staticconst size_t len_lorem = strlen(lorem); // Randomly alternate between short and long writes at a ratio of 9:1. constbool short_write = (os::random() % 10) > 0; const size_t len = os::random() % (short_write ? 10 : len_lorem);
st->write(lorem, len); return len;
}
staticvoid do_test_stringStream(stringStream* ss, size_t expected_cap) {
test_stringStream_is_zero_terminated(ss);
size_t written = 0; for (int i = 0; i < 1000; i ++) {
written += print_lorem(ss); if (expected_cap > 0 && written >= expected_cap) {
ASSERT_EQ(ss->size(), expected_cap - 1);
} else {
ASSERT_EQ(ss->size(), written);
} // Internal buffer should always be zero-terminated.
test_stringStream_is_zero_terminated(ss);
} // Reset should zero terminate too
ss->reset();
ASSERT_EQ(ss->size(), (size_t)0);
test_stringStream_is_zero_terminated(ss);
}
TEST_VM(ostream, bufferedStream_static) { char buf[100 + 1]; char* canary_at = buf + sizeof(buf) - 1;
*canary_at = 'X';
size_t stream_buf_size = sizeof(buf) - 1;
bufferedStream bs(buf, stream_buf_size);
size_t written = 0; for (int i = 0; i < 100; i ++) {
written += print_lorem(&bs); if (written < stream_buf_size) {
ASSERT_EQ(bs.size(), written);
} else {
ASSERT_EQ(bs.size(), stream_buf_size - 1);
}
}
ASSERT_EQ(*canary_at, 'X'); // canary
}
TEST_VM(ostream, bufferedStream_dynamic_small) {
bufferedStream bs(1); // small to excercise realloc.
size_t written = 0; // The max cap imposed is 100M, we should be safely below this in this test. for (int i = 0; i < 10; i ++) {
written += print_lorem(&bs);
ASSERT_EQ(bs.size(), written);
}
}
/* Activate to manually test bufferedStream dynamic cap.
TEST_VM(ostream, bufferedStream_dynamic_large) { bufferedStream bs(1); // small to excercise realloc. size_t written = 0; // The max cap imposed is 100M. Writing this much should safely hit it. // Note that this will assert in debug builds which is the expected behavior. size_t expected_cap_at = 100 * M; for (int i = 0; i < 10000000; i ++) { written += print_lorem(&bs); if (written < expected_cap_at) { ASSERT_EQ(bs.size(), written); } else { ASSERT_EQ(bs.size(), expected_cap_at - 1); } } }
*/
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