Quelle  self-id-sequence-helper-test.c

// SPDX-License-Identifier: GPL-2.0-or-later
//
// self-id-sequence-helper-test.c - An application of Kunit to test helpers of self ID sequence.
//
// Copyright (c) 2024 Takashi Sakamoto

#include <kunit/test.h>

#include "phy-packet-definitions.h"

static void test_self_id_sequence_enumerator_valid(struct kunit *test)
{
 static const u32 valid_sequences[] = {
  0x00000000,
  0x00000001, 0x00800000,
  0x00000001, 0x00800001, 0x00900000,
  0x00000000,
 };
 struct self_id_sequence_enumerator enumerator;
 const u32 *entry;
 unsigned int quadlet_count;

 enumerator.cursor = valid_sequences;
 enumerator.quadlet_count = ARRAY_SIZE(valid_sequences);

 entry = self_id_sequence_enumerator_next(&enumerator, &quadlet_count);
 KUNIT_EXPECT_PTR_EQ(test, entry, &valid_sequences[0]);
 KUNIT_EXPECT_EQ(test, quadlet_count, 1);
 KUNIT_EXPECT_EQ(test, enumerator.quadlet_count, 6);

 entry = self_id_sequence_enumerator_next(&enumerator, &quadlet_count);
 KUNIT_EXPECT_PTR_EQ(test, entry, &valid_sequences[1]);
 KUNIT_EXPECT_EQ(test, quadlet_count, 2);
 KUNIT_EXPECT_EQ(test, enumerator.quadlet_count, 4);

 entry = self_id_sequence_enumerator_next(&enumerator, &quadlet_count);
 KUNIT_EXPECT_PTR_EQ(test, entry, &valid_sequences[3]);
 KUNIT_EXPECT_EQ(test, quadlet_count, 3);
 KUNIT_EXPECT_EQ(test, enumerator.quadlet_count, 1);

 entry = self_id_sequence_enumerator_next(&enumerator, &quadlet_count);
 KUNIT_EXPECT_PTR_EQ(test, entry, &valid_sequences[6]);
 KUNIT_EXPECT_EQ(test, quadlet_count, 1);
 KUNIT_EXPECT_EQ(test, enumerator.quadlet_count, 0);

 entry = self_id_sequence_enumerator_next(&enumerator, &quadlet_count);
 KUNIT_EXPECT_EQ(test, PTR_ERR(entry), -ENODATA);
}

static void test_self_id_sequence_enumerator_invalid(struct kunit *test)
{
 static const u32 invalid_sequences[] = {
  0x00000001,
 };
 struct self_id_sequence_enumerator enumerator;
 const u32 *entry;
 unsigned int count;

 enumerator.cursor = invalid_sequences;
 enumerator.quadlet_count = ARRAY_SIZE(invalid_sequences);

 entry = self_id_sequence_enumerator_next(&enumerator, &count);
 KUNIT_EXPECT_EQ(test, PTR_ERR(entry), -EPROTO);
}

static void test_self_id_sequence_get_port_status(struct kunit *test)
{
 static const u32 expected[] = {
  0x000000e5,
  0x00839e79,
  0x0091e79d,
  0x00a279e4,
 };
 u32 quadlets [] = {
  0x00000001,
  0x00800001,
  0x00900001,
  0x00a00000,
 };
 enum phy_packet_self_id_port_status port_status[28];
 unsigned int port_capacity;
 unsigned int port_index;

 KUNIT_ASSERT_EQ(test, ARRAY_SIZE(expected), ARRAY_SIZE(quadlets));

 // With an extra port.
 port_capacity = self_id_sequence_get_port_capacity(ARRAY_SIZE(expected)) + 1;
 KUNIT_ASSERT_EQ(test, port_capacity, ARRAY_SIZE(port_status));

 for (port_index = 0; port_index < port_capacity; ++port_index) {
  port_status[port_index] =
   self_id_sequence_get_port_status(expected, ARRAY_SIZE(expected), port_index);
  self_id_sequence_set_port_status(quadlets, ARRAY_SIZE(quadlets), port_index,
       port_status[port_index]);
 }

 // Self ID zero.
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[0]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[1]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[2]);

 // Self ID one.
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[3]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[4]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[5]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[6]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[7]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[8]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[9]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[10]);

 // Self ID two.
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[11]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[12]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[13]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[14]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[15]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[16]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[17]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[18]);

 // Self ID three.
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[19]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[20]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[21]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[22]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[23]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[24]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[25]);
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[26]);

 // Our of order.
 KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[27]);

 KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
}

static struct kunit_case self_id_sequence_helper_test_cases[] = {
 KUNIT_CASE(test_self_id_sequence_enumerator_valid),
 KUNIT_CASE(test_self_id_sequence_enumerator_invalid),
 KUNIT_CASE(test_self_id_sequence_get_port_status),
 {}
};

static struct kunit_suite self_id_sequence_helper_test_suite = {
 .name = "self-id-sequence-helper",
 .test_cases = self_id_sequence_helper_test_cases,
};
kunit_test_suite(self_id_sequence_helper_test_suite);

MODULE_DESCRIPTION("Unit test suite for helpers of self ID sequence");
MODULE_LICENSE("GPL");