tests: Remove broken net_buf unit tests

The net_buf unit tests were doing some pretty hacky stuff with
defining a dummy _net_buf_pool_list variable to fulfil the linker
magic that happens with a real build. Until now the code got lucky in
that the simple net_buf_alloc() tests didn't depend on
_net_buf_pool_list being valid, however with the coming redesign even
net_buf_alloc will require proper setup of this.

Since the unit tests were extremely minimal, and not testing anything
beyond what tests/net/buf already tests, just remove them for now.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

doc/subsystems/test/ztest.rst

@@ -70,27 +70,6 @@ and are used to decide whether a test failed or passed by verifying whether an
 interaction with an object occurred, and if required, to assert the order of
 that interaction.
 
-The :file:`samples/testing/unit` folder contains an example for testing
-the net-buf api of Zephyr.
-
-CMakeLists.txt
-
-.. literalinclude:: ../../../samples/testing/unit/CMakeLists.txt
-   :language: CMake
-   :linenos:
-
-sample.yaml
-
-.. literalinclude:: ../../../samples/testing/unit/sample.yaml
-   :language: yaml
-   :linenos:
-
-main.c
-
-.. literalinclude:: ../../../samples/testing/unit/main.c
-   :language: c
-   :linenos:
-
 API reference
 *************
 

samples/testing/unit/CMakeLists.txt

@@ -1,5 +0,0 @@
-list(APPEND INCLUDE subsys)
-
-include($ENV{ZEPHYR_BASE}/tests/unit/unittest.cmake)
-project(none)
-

samples/testing/unit/main.c

@@ -1,69 +0,0 @@
-/*
- * Copyright (c) 2016 Intel Corporation
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <ztest.h>
-#include <net/buf.h>
-
-struct net_buf_pool _net_buf_pool_list[1];
-
-unsigned int irq_lock(void)
-{
-	return 0;
-}
-
-void irq_unlock(unsigned int key)
-{
-}
-
-#include <net/buf.c>
-
-void k_queue_init(struct k_queue *fifo) {}
-void k_queue_append_list(struct k_queue *fifo, void *head, void *tail) {}
-
-int k_is_in_isr(void)
-{
-	return 0;
-}
-
-void *k_queue_get(struct k_queue *fifo, s32_t timeout)
-{
-	return NULL;
-}
-
-void k_queue_append(struct k_queue *fifo, void *data)
-{
-}
-
-void k_queue_prepend(struct k_queue *fifo, void *data)
-{
-}
-
-#define TEST_BUF_COUNT 1
-#define TEST_BUF_SIZE 74
-
-NET_BUF_POOL_DEFINE(bufs_pool, TEST_BUF_COUNT, TEST_BUF_SIZE,
-		    sizeof(int), NULL);
-
-static void test_get_single_buffer(void)
-{
-	struct net_buf *buf;
-
-	buf = net_buf_alloc(&bufs_pool, K_NO_WAIT);
-
-	zassert_equal(buf->ref, 1, "Invalid refcount");
-	zassert_equal(buf->len, 0, "Invalid length");
-	zassert_equal(buf->flags, 0, "Invalid flags");
-	zassert_equal_ptr(buf->frags, NULL, "Frags not NULL");
-}
-
-void test_main(void)
-{
-	ztest_test_suite(net_buf_test,
-		ztest_unit_test(test_get_single_buffer)
-	);
-
-	ztest_run_test_suite(net_buf_test);
-}

samples/testing/unit/sample.yaml

@@ -1,7 +0,0 @@
-sample:
-  description: TBD
-  name: TBD
-tests:
-  test:
-    tags: buf
-    type: unit

tests/unit/net/buf/CMakeLists.txt

@@ -1,5 +0,0 @@
-list(APPEND INCLUDE subsys)
-
-include($ENV{ZEPHYR_BASE}/tests/unit/unittest.cmake)
-project(none)
-

tests/unit/net/buf/main.c

@@ -1,69 +0,0 @@
-/*
- * Copyright (c) 2016 Intel Corporation
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <ztest.h>
-#include <net/buf.h>
-
-struct net_buf_pool _net_buf_pool_list[1];
-
-unsigned int irq_lock(void)
-{
-	return 0;
-}
-
-void irq_unlock(unsigned int key)
-{
-}
-
-#include <net/buf.c>
-
-void k_queue_init(struct k_queue *queue) {}
-void k_queue_append_list(struct k_queue *queue, void *head, void *tail) {}
-
-int k_is_in_isr(void)
-{
-	return 0;
-}
-
-void *k_queue_get(struct k_queue *queue, s32_t timeout)
-{
-	return NULL;
-}
-
-void k_queue_append(struct k_queue *queue, void *data)
-{
-}
-
-void k_queue_prepend(struct k_queue *fifo, void *data)
-{
-}
-
-#define TEST_BUF_COUNT 1
-#define TEST_BUF_SIZE 74
-
-NET_BUF_POOL_DEFINE(bufs_pool, TEST_BUF_COUNT, TEST_BUF_SIZE,
-		    sizeof(int), NULL);
-
-static void test_get_single_buffer(void)
-{
-	struct net_buf *buf;
-
-	buf = net_buf_alloc(&bufs_pool, K_NO_WAIT);
-
-	zassert_equal(buf->ref, 1, "Invalid refcount");
-	zassert_equal(buf->len, 0, "Invalid length");
-	zassert_equal(buf->flags, 0, "Invalid flags");
-	zassert_equal_ptr(buf->frags, NULL, "Frags not NULL");
-}
-
-void test_main(void)
-{
-	ztest_test_suite(net_buf_test,
-		ztest_unit_test(test_get_single_buffer)
-	);
-
-	ztest_run_test_suite(net_buf_test);
-}

tests/unit/net/buf/testcase.yaml

@@ -1,5 +0,0 @@
-tests:
-  test:
-    tags: buf
-    timeout: 5
-    type: unit