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-rw-r--r--lib/cmdline_kunit.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/lib/cmdline_kunit.c b/lib/cmdline_kunit.c
new file mode 100644
index 0000000000..d4572dbc91
--- /dev/null
+++ b/lib/cmdline_kunit.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test cases for API provided by cmdline.c
+ */
+
+#include <kunit/test.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/string.h>
+
+static const char *cmdline_test_strings[] = {
+ "\"\"", "" , "=" , "\"-", "," , "-," , ",-" , "-" ,
+ "+," , "--", ",,", "''" , "\"\",", "\",\"", "-\"\"", "\"",
+};
+
+static const int cmdline_test_values[] = {
+ 1, 1, 1, 1, 2, 3, 2, 3,
+ 1, 3, 2, 1, 1, 1, 3, 1,
+};
+
+static_assert(ARRAY_SIZE(cmdline_test_strings) == ARRAY_SIZE(cmdline_test_values));
+
+static const char *cmdline_test_range_strings[] = {
+ "-7" , "--7" , "-1-2" , "7--9",
+ "7-" , "-7--9", "7-9," , "9-7" ,
+ "5-a", "a-5" , "5-8" , ",8-5",
+ "+,1", "-,4" , "-3,0-1,6", "4,-" ,
+ " +2", " -9" , "0-1,-3,6", "- 9" ,
+};
+
+static const int cmdline_test_range_values[][16] = {
+ { 1, -7, }, { 0, -0, }, { 4, -1, 0, +1, 2, }, { 0, 7, },
+ { 0, +7, }, { 0, -7, }, { 3, +7, 8, +9, 0, }, { 0, 9, },
+ { 0, +5, }, { 0, -0, }, { 4, +5, 6, +7, 8, }, { 0, 0, },
+ { 0, +0, }, { 0, -0, }, { 4, -3, 0, +1, 6, }, { 1, 4, },
+ { 0, +0, }, { 0, -0, }, { 4, +0, 1, -3, 6, }, { 0, 0, },
+};
+
+static_assert(ARRAY_SIZE(cmdline_test_range_strings) == ARRAY_SIZE(cmdline_test_range_values));
+
+static void cmdline_do_one_test(struct kunit *test, const char *in, int rc, int offset)
+{
+ const char *fmt = "Pattern: %s";
+ const char *out = in;
+ int dummy;
+ int ret;
+
+ ret = get_option((char **)&out, &dummy);
+
+ KUNIT_EXPECT_EQ_MSG(test, ret, rc, fmt, in);
+ KUNIT_EXPECT_PTR_EQ_MSG(test, out, in + offset, fmt, in);
+}
+
+static void cmdline_test_noint(struct kunit *test)
+{
+ unsigned int i = 0;
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ int rc = 0;
+ int offset;
+
+ /* Only first and leading '-' will advance the pointer */
+ offset = !!(*str == '-');
+ cmdline_do_one_test(test, str, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static void cmdline_test_lead_int(struct kunit *test)
+{
+ unsigned int i = 0;
+ char in[32];
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ int rc = cmdline_test_values[i];
+ int offset;
+
+ sprintf(in, "%u%s", get_random_u8(), str);
+ /* Only first '-' after the number will advance the pointer */
+ offset = strlen(in) - strlen(str) + !!(rc == 2);
+ cmdline_do_one_test(test, in, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static void cmdline_test_tail_int(struct kunit *test)
+{
+ unsigned int i = 0;
+ char in[32];
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ /* When "" or "-" the result will be valid integer */
+ int rc = strcmp(str, "") ? (strcmp(str, "-") ? 0 : 1) : 1;
+ int offset;
+
+ sprintf(in, "%s%u", str, get_random_u8());
+ /*
+ * Only first and leading '-' not followed by integer
+ * will advance the pointer.
+ */
+ offset = rc ? strlen(in) : !!(*str == '-');
+ cmdline_do_one_test(test, in, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static void cmdline_do_one_range_test(struct kunit *test, const char *in,
+ unsigned int n, const int *e)
+{
+ unsigned int i;
+ int r[16];
+ int *p;
+
+ memset(r, 0, sizeof(r));
+ get_options(in, ARRAY_SIZE(r), r);
+ KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (parsed) expected %d numbers, got %d",
+ n, e[0], r[0]);
+ for (i = 1; i < ARRAY_SIZE(r); i++)
+ KUNIT_EXPECT_EQ_MSG(test, r[i], e[i], "in test %u at %u", n, i);
+
+ memset(r, 0, sizeof(r));
+ get_options(in, 0, r);
+ KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (validated) expected %d numbers, got %d",
+ n, e[0], r[0]);
+
+ p = memchr_inv(&r[1], 0, sizeof(r) - sizeof(r[0]));
+ KUNIT_EXPECT_PTR_EQ_MSG(test, p, NULL, "in test %u at %u out of bound", n, p - r);
+}
+
+static void cmdline_test_range(struct kunit *test)
+{
+ unsigned int i = 0;
+
+ do {
+ const char *str = cmdline_test_range_strings[i];
+ const int *e = cmdline_test_range_values[i];
+
+ cmdline_do_one_range_test(test, str, i, e);
+ } while (++i < ARRAY_SIZE(cmdline_test_range_strings));
+}
+
+static struct kunit_case cmdline_test_cases[] = {
+ KUNIT_CASE(cmdline_test_noint),
+ KUNIT_CASE(cmdline_test_lead_int),
+ KUNIT_CASE(cmdline_test_tail_int),
+ KUNIT_CASE(cmdline_test_range),
+ {}
+};
+
+static struct kunit_suite cmdline_test_suite = {
+ .name = "cmdline",
+ .test_cases = cmdline_test_cases,
+};
+kunit_test_suite(cmdline_test_suite);
+
+MODULE_LICENSE("GPL");