A lot of the expectation and assertion infrastructure prints out fairly complicated test failure messages, so add a C++ style log library for for logging test results.
Signed-off-by: Brendan Higgins brendanhiggins@google.com --- include/kunit/kunit-stream.h | 50 ++++++++++++ include/kunit/test.h | 2 + kunit/Makefile | 3 +- kunit/kunit-stream.c | 153 +++++++++++++++++++++++++++++++++++ kunit/test.c | 8 ++ 5 files changed, 215 insertions(+), 1 deletion(-) create mode 100644 include/kunit/kunit-stream.h create mode 100644 kunit/kunit-stream.c
diff --git a/include/kunit/kunit-stream.h b/include/kunit/kunit-stream.h new file mode 100644 index 0000000000000..3b3119450be3f --- /dev/null +++ b/include/kunit/kunit-stream.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * C++ stream style string formatter and printer used in KUnit for outputting + * KUnit messages. + * + * Copyright (C) 2018, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#ifndef _KUNIT_KUNIT_STREAM_H +#define _KUNIT_KUNIT_STREAM_H + +#include <linux/types.h> +#include <kunit/string-stream.h> + +struct kunit; + +/** + * struct kunit_stream - a std::stream style string builder. + * @set_level: sets the level that this string should be printed at. + * @add: adds the formatted input to the internal buffer. + * @append: adds the contents of other to this. + * @commit: prints out the internal buffer to the user. + * @clear: clears the internal buffer. + * + * A std::stream style string builder. Allows messages to be built up and + * printed all at once. + */ +struct kunit_stream { + void (*set_level)(struct kunit_stream *this, const char *level); + void (*add)(struct kunit_stream *this, const char *fmt, ...); + void (*append)(struct kunit_stream *this, struct kunit_stream *other); + void (*commit)(struct kunit_stream *this); + void (*clear)(struct kunit_stream *this); + /* private: internal use only. */ + struct kunit *test; + spinlock_t lock; /* Guards level. */ + const char *level; + struct string_stream *internal_stream; +}; + +/** + * kunit_new_stream() - constructs a new &struct kunit_stream. + * @test: The test context object. + * + * Constructs a new test managed &struct kunit_stream. + */ +struct kunit_stream *kunit_new_stream(struct kunit *test); + +#endif /* _KUNIT_KUNIT_STREAM_H */ diff --git a/include/kunit/test.h b/include/kunit/test.h index 583840e24ffda..ea424095e4fb4 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -11,6 +11,7 @@
#include <linux/types.h> #include <linux/slab.h> +#include <kunit/kunit-stream.h>
struct kunit_resource;
@@ -171,6 +172,7 @@ struct kunit { void (*vprintk)(const struct kunit *test, const char *level, struct va_format *vaf); + void (*fail)(struct kunit *test, struct kunit_stream *stream); };
int kunit_init_test(struct kunit *test, const char *name); diff --git a/kunit/Makefile b/kunit/Makefile index 275b565a0e81f..6ddc622ee6b1c 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_KUNIT) += test.o \ - string-stream.o + string-stream.o \ + kunit-stream.o diff --git a/kunit/kunit-stream.c b/kunit/kunit-stream.c new file mode 100644 index 0000000000000..70f5182245e0b --- /dev/null +++ b/kunit/kunit-stream.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * C++ stream style string formatter and printer used in KUnit for outputting + * KUnit messages. + * + * Copyright (C) 2018, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#include <kunit/test.h> +#include <kunit/kunit-stream.h> +#include <kunit/string-stream.h> + +static const char *kunit_stream_get_level(struct kunit_stream *this) +{ + unsigned long flags; + const char *level; + + spin_lock_irqsave(&this->lock, flags); + level = this->level; + spin_unlock_irqrestore(&this->lock, flags); + + return level; +} + +static void kunit_stream_set_level(struct kunit_stream *this, const char *level) +{ + unsigned long flags; + + spin_lock_irqsave(&this->lock, flags); + this->level = level; + spin_unlock_irqrestore(&this->lock, flags); +} + +static void kunit_stream_add(struct kunit_stream *this, const char *fmt, ...) +{ + va_list args; + struct string_stream *stream = this->internal_stream; + + va_start(args, fmt); + if (stream->vadd(stream, fmt, args) < 0) + kunit_err(this->test, "Failed to allocate fragment: %s", fmt); + + va_end(args); +} + +static void kunit_stream_append(struct kunit_stream *this, + struct kunit_stream *other) +{ + struct string_stream *other_stream = other->internal_stream; + const char *other_content; + + other_content = other_stream->get_string(other_stream); + + if (!other_content) { + kunit_err(this->test, + "Failed to get string from second argument for appending."); + return; + } + + this->add(this, other_content); +} + +static void kunit_stream_clear(struct kunit_stream *this) +{ + this->internal_stream->clear(this->internal_stream); +} + +static void kunit_stream_commit(struct kunit_stream *this) +{ + struct string_stream *stream = this->internal_stream; + struct string_stream_fragment *fragment; + const char *level; + char *buf; + + level = kunit_stream_get_level(this); + if (!level) { + kunit_err(this->test, + "Stream was committed without a specified log level."); + level = KERN_ERR; + this->set_level(this, level); + } + + buf = stream->get_string(stream); + if (!buf) { + kunit_err(this->test, + "Could not allocate buffer, dumping stream:"); + list_for_each_entry(fragment, &stream->fragments, node) { + kunit_err(this->test, fragment->fragment); + } + goto cleanup; + } + + kunit_printk(level, this->test, buf); + kfree(buf); + +cleanup: + this->clear(this); +} + +static int kunit_stream_init(struct kunit_resource *res, void *context) +{ + struct kunit *test = context; + struct kunit_stream *stream; + + stream = kzalloc(sizeof(*stream), GFP_KERNEL); + if (!stream) + return -ENOMEM; + res->allocation = stream; + stream->test = test; + spin_lock_init(&stream->lock); + stream->internal_stream = new_string_stream(); + + if (!stream->internal_stream) + return -ENOMEM; + + stream->set_level = kunit_stream_set_level; + stream->add = kunit_stream_add; + stream->append = kunit_stream_append; + stream->commit = kunit_stream_commit; + stream->clear = kunit_stream_clear; + + return 0; +} + +static void kunit_stream_free(struct kunit_resource *res) +{ + struct kunit_stream *stream = res->allocation; + + if (!stream->internal_stream->is_empty(stream->internal_stream)) { + kunit_err(stream->test, + "End of test case reached with uncommitted stream entries."); + stream->commit(stream); + } + + destroy_string_stream(stream->internal_stream); + kfree(stream); +} + +struct kunit_stream *kunit_new_stream(struct kunit *test) +{ + struct kunit_resource *res; + + res = kunit_alloc_resource(test, + kunit_stream_init, + kunit_stream_free, + test); + + if (res) + return res->allocation; + else + return NULL; +} diff --git a/kunit/test.c b/kunit/test.c index fb1a786e4c94f..abeb939dc7fa2 100644 --- a/kunit/test.c +++ b/kunit/test.c @@ -63,12 +63,20 @@ static void kunit_vprintk(const struct kunit *test, "kunit %s: %pV", test->name, vaf); }
+static void kunit_fail(struct kunit *test, struct kunit_stream *stream) +{ + kunit_set_success(test, false); + stream->set_level(stream, KERN_ERR); + stream->commit(stream); +} + int kunit_init_test(struct kunit *test, const char *name) { spin_lock_init(&test->lock); INIT_LIST_HEAD(&test->resources); test->name = name; test->vprintk = kunit_vprintk; + test->fail = kunit_fail;
return 0; }