37f0d37ffc
Passing a gfp_t to KUNIT_EXPECT_EQ() causes a cast warning:
lib/kunit/string-stream-test.c:73:9: sparse: sparse: incorrect type in
initializer (different base types) expected long long right_value
got restricted gfp_t const __right
Avoid this by testing stream->gfp for the expected value and passing the
boolean result of this comparison to KUNIT_EXPECT_TRUE(), as was already
done a few lines above in string_stream_managed_init_test().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: d1a0d699bf
("kunit: string-stream: Add tests for freeing resource-managed string_stream")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311181918.0mpCu2Xh-lkp@intel.com/
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
545 lines
17 KiB
C
545 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* KUnit test for struct string_stream.
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*
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* Copyright (C) 2019, Google LLC.
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* Author: Brendan Higgins <brendanhiggins@google.com>
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*/
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#include <kunit/static_stub.h>
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#include <kunit/test.h>
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#include <linux/ktime.h>
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#include <linux/slab.h>
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#include <linux/timekeeping.h>
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#include "string-stream.h"
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struct string_stream_test_priv {
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/* For testing resource-managed free. */
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struct string_stream *expected_free_stream;
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bool stream_was_freed;
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bool stream_free_again;
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};
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/* Avoids a cast warning if kfree() is passed direct to kunit_add_action(). */
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static void kfree_wrapper(void *p)
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{
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kfree(p);
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}
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/* Avoids a cast warning if string_stream_destroy() is passed direct to kunit_add_action(). */
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static void cleanup_raw_stream(void *p)
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{
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struct string_stream *stream = p;
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string_stream_destroy(stream);
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}
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static char *get_concatenated_string(struct kunit *test, struct string_stream *stream)
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{
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char *str = string_stream_get_string(stream);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, str);
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kunit_add_action(test, kfree_wrapper, (void *)str);
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return str;
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}
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/* Managed string_stream object is initialized correctly. */
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static void string_stream_managed_init_test(struct kunit *test)
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{
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struct string_stream *stream;
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/* Resource-managed initialization. */
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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KUNIT_EXPECT_EQ(test, stream->length, 0);
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KUNIT_EXPECT_TRUE(test, list_empty(&stream->fragments));
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KUNIT_EXPECT_TRUE(test, (stream->gfp == GFP_KERNEL));
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KUNIT_EXPECT_FALSE(test, stream->append_newlines);
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KUNIT_EXPECT_TRUE(test, string_stream_is_empty(stream));
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}
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/* Unmanaged string_stream object is initialized correctly. */
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static void string_stream_unmanaged_init_test(struct kunit *test)
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{
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struct string_stream *stream;
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stream = alloc_string_stream(GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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kunit_add_action(test, cleanup_raw_stream, stream);
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KUNIT_EXPECT_EQ(test, stream->length, 0);
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KUNIT_EXPECT_TRUE(test, list_empty(&stream->fragments));
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KUNIT_EXPECT_TRUE(test, (stream->gfp == GFP_KERNEL));
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KUNIT_EXPECT_FALSE(test, stream->append_newlines);
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KUNIT_EXPECT_TRUE(test, string_stream_is_empty(stream));
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}
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static void string_stream_destroy_stub(struct string_stream *stream)
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{
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struct kunit *fake_test = kunit_get_current_test();
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struct string_stream_test_priv *priv = fake_test->priv;
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/* The kunit could own string_streams other than the one we are testing. */
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if (stream == priv->expected_free_stream) {
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if (priv->stream_was_freed)
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priv->stream_free_again = true;
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else
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priv->stream_was_freed = true;
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}
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/*
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* Calling string_stream_destroy() will only call this function again
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* because the redirection stub is still active.
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* Avoid calling deactivate_static_stub() or changing current->kunit_test
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* during cleanup.
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*/
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string_stream_clear(stream);
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kfree(stream);
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}
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/* kunit_free_string_stream() calls string_stream_desrtoy() */
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static void string_stream_managed_free_test(struct kunit *test)
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{
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struct string_stream_test_priv *priv = test->priv;
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priv->expected_free_stream = NULL;
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priv->stream_was_freed = false;
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priv->stream_free_again = false;
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kunit_activate_static_stub(test,
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string_stream_destroy,
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string_stream_destroy_stub);
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priv->expected_free_stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->expected_free_stream);
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/* This should call the stub function. */
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kunit_free_string_stream(test, priv->expected_free_stream);
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KUNIT_EXPECT_TRUE(test, priv->stream_was_freed);
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KUNIT_EXPECT_FALSE(test, priv->stream_free_again);
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}
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/* string_stream object is freed when test is cleaned up. */
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static void string_stream_resource_free_test(struct kunit *test)
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{
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struct string_stream_test_priv *priv = test->priv;
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struct kunit *fake_test;
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fake_test = kunit_kzalloc(test, sizeof(*fake_test), GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fake_test);
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kunit_init_test(fake_test, "string_stream_fake_test", NULL);
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fake_test->priv = priv;
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/*
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* Activate stub before creating string_stream so the
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* string_stream will be cleaned up first.
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*/
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priv->expected_free_stream = NULL;
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priv->stream_was_freed = false;
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priv->stream_free_again = false;
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kunit_activate_static_stub(fake_test,
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string_stream_destroy,
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string_stream_destroy_stub);
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priv->expected_free_stream = kunit_alloc_string_stream(fake_test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->expected_free_stream);
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/* Set current->kunit_test to fake_test so the static stub will be called. */
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current->kunit_test = fake_test;
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/* Cleanup test - the stub function should be called */
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kunit_cleanup(fake_test);
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/* Set current->kunit_test back to current test. */
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current->kunit_test = test;
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KUNIT_EXPECT_TRUE(test, priv->stream_was_freed);
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KUNIT_EXPECT_FALSE(test, priv->stream_free_again);
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}
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/*
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* Add a series of lines to a string_stream. Check that all lines
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* appear in the correct order and no characters are dropped.
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*/
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static void string_stream_line_add_test(struct kunit *test)
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{
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struct string_stream *stream;
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char line[60];
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char *concat_string, *pos, *string_end;
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size_t len, total_len;
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int num_lines, i;
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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/* Add series of sequence numbered lines */
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total_len = 0;
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for (i = 0; i < 100; ++i) {
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len = snprintf(line, sizeof(line),
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"The quick brown fox jumps over the lazy penguin %d\n", i);
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/* Sanity-check that our test string isn't truncated */
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KUNIT_ASSERT_LT(test, len, sizeof(line));
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string_stream_add(stream, line);
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total_len += len;
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}
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num_lines = i;
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concat_string = get_concatenated_string(test, stream);
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KUNIT_EXPECT_NOT_ERR_OR_NULL(test, concat_string);
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KUNIT_EXPECT_EQ(test, strlen(concat_string), total_len);
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/*
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* Split the concatenated string at the newlines and check that
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* all the original added strings are present.
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*/
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pos = concat_string;
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for (i = 0; i < num_lines; ++i) {
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string_end = strchr(pos, '\n');
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KUNIT_EXPECT_NOT_NULL(test, string_end);
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/* Convert to NULL-terminated string */
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*string_end = '\0';
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snprintf(line, sizeof(line),
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"The quick brown fox jumps over the lazy penguin %d", i);
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KUNIT_EXPECT_STREQ(test, pos, line);
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pos = string_end + 1;
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}
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/* There shouldn't be any more data after this */
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KUNIT_EXPECT_EQ(test, strlen(pos), 0);
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}
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/* Add a series of lines of variable length to a string_stream. */
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static void string_stream_variable_length_line_test(struct kunit *test)
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{
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static const char line[] =
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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" 0123456789!$%^&*()_-+={}[]:;@'~#<>,.?/|";
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struct string_stream *stream;
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struct rnd_state rnd;
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char *concat_string, *pos, *string_end;
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size_t offset, total_len;
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int num_lines, i;
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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/*
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* Log many lines of varying lengths until we have created
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* many fragments.
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* The "randomness" must be repeatable.
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*/
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prandom_seed_state(&rnd, 3141592653589793238ULL);
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total_len = 0;
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for (i = 0; i < 100; ++i) {
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offset = prandom_u32_state(&rnd) % (sizeof(line) - 1);
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string_stream_add(stream, "%s\n", &line[offset]);
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total_len += sizeof(line) - offset;
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}
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num_lines = i;
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concat_string = get_concatenated_string(test, stream);
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KUNIT_EXPECT_NOT_ERR_OR_NULL(test, concat_string);
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KUNIT_EXPECT_EQ(test, strlen(concat_string), total_len);
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/*
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* Split the concatenated string at the newlines and check that
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* all the original added strings are present.
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*/
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prandom_seed_state(&rnd, 3141592653589793238ULL);
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pos = concat_string;
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for (i = 0; i < num_lines; ++i) {
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string_end = strchr(pos, '\n');
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KUNIT_EXPECT_NOT_NULL(test, string_end);
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/* Convert to NULL-terminated string */
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*string_end = '\0';
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offset = prandom_u32_state(&rnd) % (sizeof(line) - 1);
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KUNIT_EXPECT_STREQ(test, pos, &line[offset]);
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pos = string_end + 1;
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}
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/* There shouldn't be any more data after this */
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KUNIT_EXPECT_EQ(test, strlen(pos), 0);
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}
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/* Appending the content of one string stream to another. */
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static void string_stream_append_test(struct kunit *test)
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{
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static const char * const strings_1[] = {
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"one", "two", "three", "four", "five", "six",
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"seven", "eight", "nine", "ten",
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};
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static const char * const strings_2[] = {
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"Apple", "Pear", "Orange", "Banana", "Grape", "Apricot",
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};
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struct string_stream *stream_1, *stream_2;
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const char *stream1_content_before_append, *stream_2_content;
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char *combined_content;
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size_t combined_length;
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int i;
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stream_1 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_1);
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stream_2 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_2);
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/* Append content of empty stream to empty stream */
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string_stream_append(stream_1, stream_2);
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KUNIT_EXPECT_EQ(test, strlen(get_concatenated_string(test, stream_1)), 0);
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/* Add some data to stream_1 */
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for (i = 0; i < ARRAY_SIZE(strings_1); ++i)
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string_stream_add(stream_1, "%s\n", strings_1[i]);
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stream1_content_before_append = get_concatenated_string(test, stream_1);
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/* Append content of empty stream to non-empty stream */
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string_stream_append(stream_1, stream_2);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream_1),
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stream1_content_before_append);
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/* Add some data to stream_2 */
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for (i = 0; i < ARRAY_SIZE(strings_2); ++i)
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string_stream_add(stream_2, "%s\n", strings_2[i]);
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/* Append content of non-empty stream to non-empty stream */
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string_stream_append(stream_1, stream_2);
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/*
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* End result should be the original content of stream_1 plus
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* the content of stream_2.
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*/
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stream_2_content = get_concatenated_string(test, stream_2);
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combined_length = strlen(stream1_content_before_append) + strlen(stream_2_content);
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combined_length++; /* for terminating \0 */
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combined_content = kunit_kmalloc(test, combined_length, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, combined_content);
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snprintf(combined_content, combined_length, "%s%s",
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stream1_content_before_append, stream_2_content);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream_1), combined_content);
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/* Append content of non-empty stream to empty stream */
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kunit_free_string_stream(test, stream_1);
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stream_1 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_1);
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string_stream_append(stream_1, stream_2);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream_1), stream_2_content);
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}
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/* Appending the content of one string stream to one with auto-newlining. */
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static void string_stream_append_auto_newline_test(struct kunit *test)
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{
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struct string_stream *stream_1, *stream_2;
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/* Stream 1 has newline appending enabled */
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stream_1 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_1);
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string_stream_set_append_newlines(stream_1, true);
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KUNIT_EXPECT_TRUE(test, stream_1->append_newlines);
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/* Stream 2 does not append newlines */
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stream_2 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_2);
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/* Appending a stream with a newline should not add another newline */
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string_stream_add(stream_1, "Original string\n");
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string_stream_add(stream_2, "Appended content\n");
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string_stream_add(stream_2, "More stuff\n");
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string_stream_append(stream_1, stream_2);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream_1),
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"Original string\nAppended content\nMore stuff\n");
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kunit_free_string_stream(test, stream_2);
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stream_2 = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream_2);
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/*
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* Appending a stream without newline should add a final newline.
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* The appended string_stream is treated as a single string so newlines
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* should not be inserted between fragments.
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*/
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string_stream_add(stream_2, "Another");
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string_stream_add(stream_2, "And again");
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string_stream_append(stream_1, stream_2);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream_1),
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"Original string\nAppended content\nMore stuff\nAnotherAnd again\n");
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}
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/* Adding an empty string should not create a fragment. */
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static void string_stream_append_empty_string_test(struct kunit *test)
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{
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struct string_stream *stream;
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int original_frag_count;
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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/* Formatted empty string */
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string_stream_add(stream, "%s", "");
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KUNIT_EXPECT_TRUE(test, string_stream_is_empty(stream));
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KUNIT_EXPECT_TRUE(test, list_empty(&stream->fragments));
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/* Adding an empty string to a non-empty stream */
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string_stream_add(stream, "Add this line");
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original_frag_count = list_count_nodes(&stream->fragments);
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string_stream_add(stream, "%s", "");
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KUNIT_EXPECT_EQ(test, list_count_nodes(&stream->fragments), original_frag_count);
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream), "Add this line");
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}
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/* Adding strings without automatic newline appending */
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static void string_stream_no_auto_newline_test(struct kunit *test)
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{
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struct string_stream *stream;
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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/*
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* Add some strings with and without newlines. All formatted newlines
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* should be preserved. It should not add any extra newlines.
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*/
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string_stream_add(stream, "One");
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string_stream_add(stream, "Two\n");
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string_stream_add(stream, "%s\n", "Three");
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string_stream_add(stream, "%s", "Four\n");
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string_stream_add(stream, "Five\n%s", "Six");
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string_stream_add(stream, "Seven\n\n");
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string_stream_add(stream, "Eight");
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KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream),
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"OneTwo\nThree\nFour\nFive\nSixSeven\n\nEight");
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}
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/* Adding strings with automatic newline appending */
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static void string_stream_auto_newline_test(struct kunit *test)
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{
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struct string_stream *stream;
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stream = kunit_alloc_string_stream(test, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
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string_stream_set_append_newlines(stream, true);
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KUNIT_EXPECT_TRUE(test, stream->append_newlines);
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/*
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* Add some strings with and without newlines. Newlines should
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* be appended to lines that do not end with \n, but newlines
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* resulting from the formatting should not be changed.
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*/
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string_stream_add(stream, "One");
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string_stream_add(stream, "Two\n");
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string_stream_add(stream, "%s\n", "Three");
|
|
string_stream_add(stream, "%s", "Four\n");
|
|
string_stream_add(stream, "Five\n%s", "Six");
|
|
string_stream_add(stream, "Seven\n\n");
|
|
string_stream_add(stream, "Eight");
|
|
KUNIT_EXPECT_STREQ(test, get_concatenated_string(test, stream),
|
|
"One\nTwo\nThree\nFour\nFive\nSix\nSeven\n\nEight\n");
|
|
}
|
|
|
|
/*
|
|
* This doesn't actually "test" anything. It reports time taken
|
|
* and memory used for logging a large number of lines.
|
|
*/
|
|
static void string_stream_performance_test(struct kunit *test)
|
|
{
|
|
struct string_stream_fragment *frag_container;
|
|
struct string_stream *stream;
|
|
char test_line[101];
|
|
ktime_t start_time, end_time;
|
|
size_t len, bytes_requested, actual_bytes_used, total_string_length;
|
|
int offset, i;
|
|
|
|
stream = kunit_alloc_string_stream(test, GFP_KERNEL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
|
|
|
|
memset(test_line, 'x', sizeof(test_line) - 1);
|
|
test_line[sizeof(test_line) - 1] = '\0';
|
|
|
|
start_time = ktime_get();
|
|
for (i = 0; i < 10000; i++) {
|
|
offset = i % (sizeof(test_line) - 1);
|
|
string_stream_add(stream, "%s: %d\n", &test_line[offset], i);
|
|
}
|
|
end_time = ktime_get();
|
|
|
|
/*
|
|
* Calculate memory used. This doesn't include invisible
|
|
* overhead due to kernel allocator fragment size rounding.
|
|
*/
|
|
bytes_requested = sizeof(*stream);
|
|
actual_bytes_used = ksize(stream);
|
|
total_string_length = 0;
|
|
|
|
list_for_each_entry(frag_container, &stream->fragments, node) {
|
|
bytes_requested += sizeof(*frag_container);
|
|
actual_bytes_used += ksize(frag_container);
|
|
|
|
len = strlen(frag_container->fragment);
|
|
total_string_length += len;
|
|
bytes_requested += len + 1; /* +1 for '\0' */
|
|
actual_bytes_used += ksize(frag_container->fragment);
|
|
}
|
|
|
|
kunit_info(test, "Time elapsed: %lld us\n",
|
|
ktime_us_delta(end_time, start_time));
|
|
kunit_info(test, "Total string length: %zu\n", total_string_length);
|
|
kunit_info(test, "Bytes requested: %zu\n", bytes_requested);
|
|
kunit_info(test, "Actual bytes allocated: %zu\n", actual_bytes_used);
|
|
}
|
|
|
|
static int string_stream_test_init(struct kunit *test)
|
|
{
|
|
struct string_stream_test_priv *priv;
|
|
|
|
priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
test->priv = priv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct kunit_case string_stream_test_cases[] = {
|
|
KUNIT_CASE(string_stream_managed_init_test),
|
|
KUNIT_CASE(string_stream_unmanaged_init_test),
|
|
KUNIT_CASE(string_stream_managed_free_test),
|
|
KUNIT_CASE(string_stream_resource_free_test),
|
|
KUNIT_CASE(string_stream_line_add_test),
|
|
KUNIT_CASE(string_stream_variable_length_line_test),
|
|
KUNIT_CASE(string_stream_append_test),
|
|
KUNIT_CASE(string_stream_append_auto_newline_test),
|
|
KUNIT_CASE(string_stream_append_empty_string_test),
|
|
KUNIT_CASE(string_stream_no_auto_newline_test),
|
|
KUNIT_CASE(string_stream_auto_newline_test),
|
|
KUNIT_CASE(string_stream_performance_test),
|
|
{}
|
|
};
|
|
|
|
static struct kunit_suite string_stream_test_suite = {
|
|
.name = "string-stream-test",
|
|
.test_cases = string_stream_test_cases,
|
|
.init = string_stream_test_init,
|
|
};
|
|
kunit_test_suites(&string_stream_test_suite);
|