1 files changed, 90 insertions, 0 deletions
diff --git a/tests/util/qsort.c b/tests/util/qsort.c
new file mode 100644
index 000000000..d8fa20a0a
--- /dev/null
+++ b/tests/util/qsort.c
@@ -0,0 +1,90 @@
+#include "clar_libgit2.h"
+
+#define assert_sorted(a, cmp) \
+	_assert_sorted(a, ARRAY_SIZE(a), sizeof(*a), cmp)
+
+struct big_entries {
+	char c[311];
+};
+
+static void _assert_sorted(void *els, size_t n, size_t elsize, git__sort_r_cmp cmp)
+{
+	int8_t *p = els;
+
+	git__qsort_r(p, n, elsize, cmp, NULL);
+	while (n-- > 1) {
+		cl_assert(cmp(p, p + elsize, NULL) <= 0);
+		p += elsize;
+	}
+}
+
+static int cmp_big(const void *_a, const void *_b, void *payload)
+{
+	const struct big_entries *a = (const struct big_entries *)_a, *b = (const struct big_entries *)_b;
+	GIT_UNUSED(payload);
+	return (a->c[0] < b->c[0]) ? -1 : (a->c[0] > b->c[0]) ? +1 : 0;
+}
+
+static int cmp_int(const void *_a, const void *_b, void *payload)
+{
+	int a = *(const int *)_a, b = *(const int *)_b;
+	GIT_UNUSED(payload);
+	return (a < b) ? -1 : (a > b) ? +1 : 0;
+}
+
+static int cmp_str(const void *_a, const void *_b, void *payload)
+{
+	GIT_UNUSED(payload);
+	return strcmp((const char *) _a, (const char *) _b);
+}
+
+void test_qsort__array_with_single_entry(void)
+{
+	int a[] = { 10 };
+	assert_sorted(a, cmp_int);
+}
+
+void test_qsort__array_with_equal_entries(void)
+{
+	int a[] = { 4, 4, 4, 4 };
+	assert_sorted(a, cmp_int);
+}
+
+void test_qsort__sorted_array(void)
+{
+	int a[] = { 1, 10 };
+	assert_sorted(a, cmp_int);
+}
+
+void test_qsort__unsorted_array(void)
+{
+	int a[] = { 123, 9, 412938, 10, 234, 89 };
+	assert_sorted(a, cmp_int);
+}
+
+void test_qsort__sorting_strings(void)
+{
+	char *a[] = { "foo", "bar", "baz" };
+	assert_sorted(a, cmp_str);
+}
+
+void test_qsort__sorting_big_entries(void)
+{
+	struct big_entries a[5];
+
+	memset(&a, 0, sizeof(a));
+
+	memset(a[0].c, 'w', sizeof(a[0].c) - 1);
+	memset(a[1].c, 'c', sizeof(a[1].c) - 1);
+	memset(a[2].c, 'w', sizeof(a[2].c) - 1);
+	memset(a[3].c, 'h', sizeof(a[3].c) - 1);
+	memset(a[4].c, 'a', sizeof(a[4].c) - 1);
+
+	assert_sorted(a, cmp_big);
+
+	cl_assert_equal_i(strspn(a[0].c, "a"), sizeof(a[0].c) - 1);
+	cl_assert_equal_i(strspn(a[1].c, "c"), sizeof(a[1].c) - 1);
+	cl_assert_equal_i(strspn(a[2].c, "h"), sizeof(a[2].c) - 1);
+	cl_assert_equal_i(strspn(a[3].c, "w"), sizeof(a[3].c) - 1);
+	cl_assert_equal_i(strspn(a[4].c, "w"), sizeof(a[4].c) - 1);
+}