[PULL 40/56] tests/unit: add test-fifo unit test

[Philippe Mathieu-Daudé]

From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

This tests the Fifo8 implementation basic operations as well as
testing the *_bufptr() in-place buffer functions and the newer
*_buf() functions that also handle wraparound of the internal
FIFO buffer.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Octavian Purdila <tavip@google.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240828122258.928947-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 tests/unit/test-fifo.c | 256 +++++++++++++++++++++++++++++++++++++++++
 tests/unit/meson.build |   1 +
 2 files changed, 257 insertions(+)
 create mode 100644 tests/unit/test-fifo.c

diff --git a/tests/unit/test-fifo.c b/tests/unit/test-fifo.c
new file mode 100644
index 0000000000..1e54cde871
--- /dev/null
+++ b/tests/unit/test-fifo.c
@@ -0,0 +1,256 @@
+/*
+ * Fifo8 tests
+ *
+ * Copyright 2024 Mark Cave-Ayland
+ *
+ * Authors:
+ *  Mark Cave-Ayland    <mark.cave-ayland@ilande.co.uk>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "migration/vmstate.h"
+#include "qemu/fifo8.h"
+
+const VMStateInfo vmstate_info_uint32;
+const VMStateInfo vmstate_info_buffer;
+
+
+static void test_fifo8_pop_bufptr_wrap(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in1[] = { 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_in2[] = { 0x5, 0x6, 0x7, 0x8, 0x1, 0x2 };
+    const uint8_t *buf;
+    uint32_t count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in1, sizeof(data_in1));
+    buf = fifo8_pop_bufptr(&fifo, 2, &count);
+    g_assert(count == 2);
+    g_assert(buf[0] == 0x1 && buf[1] == 0x2);
+
+    fifo8_push_all(&fifo, data_in2, sizeof(data_in2));
+    buf = fifo8_pop_bufptr(&fifo, 8, &count);
+    g_assert(count == 6);
+    g_assert(buf[0] == 0x3 && buf[1] == 0x4 && buf[2] == 0x5 &&
+             buf[3] == 0x6 && buf[4] == 0x7 && buf[5] == 0x8);
+
+    g_assert(fifo8_num_used(&fifo) == 2);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_pop_bufptr(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in[] = { 0x1, 0x2, 0x3, 0x4 };
+    const uint8_t *buf;
+    uint32_t count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in, sizeof(data_in));
+    buf = fifo8_pop_bufptr(&fifo, 2, &count);
+    g_assert(count == 2);
+    g_assert(buf[0] == 0x1 && buf[1] == 0x2);
+
+    g_assert(fifo8_num_used(&fifo) == 2);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_peek_bufptr_wrap(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in1[] = { 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_in2[] = { 0x5, 0x6, 0x7, 0x8, 0x1, 0x2 };
+    const uint8_t *buf;
+    uint32_t count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in1, sizeof(data_in1));
+    buf = fifo8_peek_bufptr(&fifo, 2, &count);
+    g_assert(count == 2);
+    g_assert(buf[0] == 0x1 && buf[1] == 0x2);
+
+    buf = fifo8_pop_bufptr(&fifo, 2, &count);
+    g_assert(count == 2);
+    g_assert(buf[0] == 0x1 && buf[1] == 0x2);
+    fifo8_push_all(&fifo, data_in2, sizeof(data_in2));
+
+    buf = fifo8_peek_bufptr(&fifo, 8, &count);
+    g_assert(count == 6);
+    g_assert(buf[0] == 0x3 && buf[1] == 0x4 && buf[2] == 0x5 &&
+             buf[3] == 0x6 && buf[4] == 0x7 && buf[5] == 0x8);
+
+    g_assert(fifo8_num_used(&fifo) == 8);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_peek_bufptr(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in[] = { 0x1, 0x2, 0x3, 0x4 };
+    const uint8_t *buf;
+    uint32_t count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in, sizeof(data_in));
+    buf = fifo8_peek_bufptr(&fifo, 2, &count);
+    g_assert(count == 2);
+    g_assert(buf[0] == 0x1 && buf[1] == 0x2);
+
+    g_assert(fifo8_num_used(&fifo) == 4);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_pop_buf_wrap(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in1[] = { 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_in2[] = { 0x5, 0x6, 0x7, 0x8, 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_out[4];
+    int count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in1, sizeof(data_in1));
+    fifo8_pop_buf(&fifo, NULL, 4);
+
+    fifo8_push_all(&fifo, data_in2, sizeof(data_in2));
+    count = fifo8_pop_buf(&fifo, NULL, 4);
+    g_assert(count == 4);
+    count = fifo8_pop_buf(&fifo, data_out, 4);
+    g_assert(count == 4);
+    g_assert(data_out[0] == 0x1 && data_out[1] == 0x2 &&
+             data_out[2] == 0x3 && data_out[3] == 0x4);
+
+    g_assert(fifo8_num_used(&fifo) == 0);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_pop_buf(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in[] = { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8 };
+    uint8_t data_out[] = { 0xff, 0xff, 0xff, 0xff };
+    int count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in, sizeof(data_in));
+    count = fifo8_pop_buf(&fifo, NULL, 4);
+    g_assert(count == 4);
+    count = fifo8_pop_buf(&fifo, data_out, 4);
+    g_assert(data_out[0] == 0x5 && data_out[1] == 0x6 &&
+             data_out[2] == 0x7 && data_out[3] == 0x8);
+
+    g_assert(fifo8_num_used(&fifo) == 0);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_peek_buf_wrap(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in1[] = { 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_in2[] = { 0x5, 0x6, 0x7, 0x8, 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_out[4];
+    int count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in1, sizeof(data_in1));
+    fifo8_pop_buf(&fifo, NULL, 4);
+
+    fifo8_push_all(&fifo, data_in2, sizeof(data_in2));
+    count = fifo8_peek_buf(&fifo, NULL, 4);
+    g_assert(count == 4);
+    count = fifo8_peek_buf(&fifo, data_out, 4);
+    g_assert(count == 4);
+    g_assert(data_out[0] == 0x5 && data_out[1] == 0x6 &&
+             data_out[2] == 0x7 && data_out[3] == 0x8);
+
+    g_assert(fifo8_num_used(&fifo) == 8);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_peek_buf(void)
+{
+    Fifo8 fifo;
+    uint8_t data_in[] = { 0x1, 0x2, 0x3, 0x4 };
+    uint8_t data_out[] = { 0xff, 0xff, 0xff, 0xff };
+    int count;
+
+    fifo8_create(&fifo, 8);
+
+    fifo8_push_all(&fifo, data_in, sizeof(data_in));
+    count = fifo8_peek_buf(&fifo, NULL, 4);
+    g_assert(count == 4);
+    g_assert(data_out[0] == 0xff && data_out[1] == 0xff &&
+             data_out[2] == 0xff && data_out[3] == 0xff);
+
+    count = fifo8_peek_buf(&fifo, data_out, 4);
+    g_assert(count == 4);
+    g_assert(data_out[0] == 0x1 && data_out[1] == 0x2 &&
+             data_out[2] == 0x3 && data_out[3] == 0x4);
+
+    g_assert(fifo8_num_used(&fifo) == 4);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_peek(void)
+{
+    Fifo8 fifo;
+    uint8_t c;
+
+    fifo8_create(&fifo, 8);
+    fifo8_push(&fifo, 0x1);
+    fifo8_push(&fifo, 0x2);
+
+    c = fifo8_peek(&fifo);
+    g_assert(c == 0x1);
+    fifo8_pop(&fifo);
+    c = fifo8_peek(&fifo);
+    g_assert(c == 0x2);
+
+    g_assert(fifo8_num_used(&fifo) == 1);
+    fifo8_destroy(&fifo);
+}
+
+static void test_fifo8_pushpop(void)
+{
+    Fifo8 fifo;
+    uint8_t c;
+
+    fifo8_create(&fifo, 8);
+    fifo8_push(&fifo, 0x1);
+    fifo8_push(&fifo, 0x2);
+
+    c = fifo8_pop(&fifo);
+    g_assert(c == 0x1);
+    c = fifo8_pop(&fifo);
+    g_assert(c == 0x2);
+
+    g_assert(fifo8_num_used(&fifo) == 0);
+    fifo8_destroy(&fifo);
+}
+
+int main(int argc, char *argv[])
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/fifo8/pushpop", test_fifo8_pushpop);
+    g_test_add_func("/fifo8/peek", test_fifo8_peek);
+    g_test_add_func("/fifo8/peek_buf", test_fifo8_peek_buf);
+    g_test_add_func("/fifo8/peek_buf_wrap", test_fifo8_peek_buf_wrap);
+    g_test_add_func("/fifo8/pop_buf", test_fifo8_pop_buf);
+    g_test_add_func("/fifo8/pop_buf_wrap", test_fifo8_pop_buf_wrap);
+    g_test_add_func("/fifo8/peek_bufptr", test_fifo8_peek_bufptr);
+    g_test_add_func("/fifo8/peek_bufptr_wrap", test_fifo8_peek_bufptr_wrap);
+    g_test_add_func("/fifo8/pop_bufptr", test_fifo8_pop_bufptr);
+    g_test_add_func("/fifo8/pop_bufptr_wrap", test_fifo8_pop_bufptr_wrap);
+    return g_test_run();
+}
diff --git a/tests/unit/meson.build b/tests/unit/meson.build
index 972d792883..21d101301b 100644
--- a/tests/unit/meson.build
+++ b/tests/unit/meson.build
@@ -47,6 +47,7 @@ tests = {
   'test-logging': [],
   'test-qapi-util': [],
   'test-interval-tree': [],
+  'test-fifo': [],
 }
 
 if have_system or have_tools
-- 
2.45.2