1 files changed, 93 insertions, 0 deletions
diff --git a/tests/odb/mixed.c b/tests/odb/mixed.c
new file mode 100644
index 000000000..51970ceec
--- /dev/null
+++ b/tests/odb/mixed.c
@@ -0,0 +1,93 @@
+#include "clar_libgit2.h"
+#include "odb.h"
+
+static git_odb *_odb;
+
+void test_odb_mixed__initialize(void)
+{
+	cl_git_pass(git_odb_open(&_odb, cl_fixture("duplicate.git/objects")));
+}
+
+void test_odb_mixed__cleanup(void)
+{
+	git_odb_free(_odb);
+	_odb = NULL;
+}
+
+void test_odb_mixed__dup_oid(void) {
+	const char hex[] = "ce013625030ba8dba906f756967f9e9ca394464a";
+	const char short_hex[] = "ce01362";
+	git_oid oid;
+	git_odb_object *obj;
+
+	cl_git_pass(git_oid_fromstr(&oid, hex));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, GIT_OID_HEXSZ));
+	git_odb_object_free(obj);
+	cl_git_pass(git_oid_fromstrn(&oid, short_hex, sizeof(short_hex) - 1));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, sizeof(short_hex) - 1));
+	git_odb_object_free(obj);
+}
+
+/* some known sha collisions of file content:
+ *   'aabqhq' and 'aaazvc' with prefix 'dea509d0' (+ '9' and + 'b')
+ *   'aaeufo' and 'aaaohs' with prefix '81b5bff5' (+ 'f' and + 'b')
+ *   'aafewy' and 'aaepta' with prefix '739e3c4c'
+ *   'aahsyn' and 'aadrjg' with prefix '0ddeaded' (+ '9' and + 'e')
+ */
+
+void test_odb_mixed__dup_oid_prefix_0(void) {
+	char hex[10];
+	git_oid oid;
+	git_odb_object *obj;
+
+	/* ambiguous in the same pack file */
+
+	strncpy(hex, "dea509d0", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_assert_equal_i(
+		GIT_EAMBIGUOUS, git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+
+	strncpy(hex, "dea509d09", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+
+	strncpy(hex, "dea509d0b", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+
+	/* ambiguous in different pack files */
+
+	strncpy(hex, "81b5bff5", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_assert_equal_i(
+		GIT_EAMBIGUOUS, git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+
+	strncpy(hex, "81b5bff5b", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+
+	strncpy(hex, "81b5bff5f", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+
+	/* ambiguous in pack file and loose */
+
+	strncpy(hex, "0ddeaded", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_assert_equal_i(
+		GIT_EAMBIGUOUS, git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+
+	strncpy(hex, "0ddeaded9", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+
+	strncpy(hex, "0ddeadede", sizeof(hex));
+	cl_git_pass(git_oid_fromstrn(&oid, hex, strlen(hex)));
+	cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, strlen(hex)));
+	git_odb_object_free(obj);
+}