u-string-list: move "remove duplicates" test to "u-string-list.c"

We use "test-tool string-list remove_duplicates" to test the
"string_list_remove_duplicates" function. As we have introduced the unit
test, we'd better remove the logic from shell script to C program to
improve test speed and readability.

As all the tests in shell script are removed, let's just delete the
"t0063-string-list.sh" and update the "meson.build" file to align with
this change.

Also we could simply remove "DISABLE_SIGN_COMPARE_WARNINGS" due to we
have already deleted related code.

Signed-off-by: shejialuo <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: shejialuo

t/helper/test-string-list.c

@@ -1,48 +1,9 @@
-#define DISABLE_SIGN_COMPARE_WARNINGS
-
 #include "test-tool.h"
 #include "strbuf.h"
 #include "string-list.h"
 
-/*
- * Parse an argument into a string list.  arg should either be a
- * ':'-separated list of strings, or "-" to indicate an empty string
- * list (as opposed to "", which indicates a string list containing a
- * single empty string).  list->strdup_strings must be set.
- */
-static void parse_string_list(struct string_list *list, const char *arg)
-{
-	if (!strcmp(arg, "-"))
-		return;
-
-	(void)string_list_split(list, arg, ':', -1);
-}
-
-static void write_list_compact(const struct string_list *list)
-{
-	int i;
-	if (!list->nr)
-		printf("-\n");
-	else {
-		printf("%s", list->items[0].string);
-		for (i = 1; i < list->nr; i++)
-			printf(":%s", list->items[i].string);
-		printf("\n");
-	}
-}
-
 int cmd__string_list(int argc, const char **argv)
 {
-	if (argc == 3 && !strcmp(argv[1], "remove_duplicates")) {
-		struct string_list list = STRING_LIST_INIT_DUP;
-
-		parse_string_list(&list, argv[2]);
-		string_list_remove_duplicates(&list, 0);
-		write_list_compact(&list);
-		string_list_clear(&list, 0);
-		return 0;
-	}
-
 	if (argc == 2 && !strcmp(argv[1], "sort")) {
 		struct string_list list = STRING_LIST_INIT_NODUP;
 		struct strbuf sb = STRBUF_INIT;

t/meson.build

@@ -124,7 +124,6 @@ integration_tests = [
   't0060-path-utils.sh',
   't0061-run-command.sh',
   't0062-revision-walking.sh',
-  't0063-string-list.sh',
   't0066-dir-iterator.sh',
   't0067-parse_pathspec_file.sh',
   't0068-for-each-repo.sh',

t/t0063-string-list.sh

@@ -169,3 +169,65 @@ void test_string_list__filter(void)
 
 	t_string_list_clear(&list, 0);
 }
+
+static void t_string_list_remove_duplicates(struct string_list *list, ...)
+{
+	struct string_list expected_strings = STRING_LIST_INIT_DUP;
+	va_list ap;
+
+	va_start(ap, list);
+	t_vcreate_string_list_dup(&expected_strings, 0, ap);
+	va_end(ap);
+
+	string_list_remove_duplicates(list, 0);
+	t_string_list_equal(list, &expected_strings);
+
+	string_list_clear(&expected_strings, 0);
+}
+
+void test_string_list__remove_duplicates(void)
+{
+	struct string_list list = STRING_LIST_INIT_DUP;
+
+	t_create_string_list_dup(&list, 0, NULL);
+	t_string_list_remove_duplicates(&list, NULL);
+
+	t_create_string_list_dup(&list, 0, "", NULL);
+	t_string_list_remove_duplicates(&list, "", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", NULL);
+	t_string_list_remove_duplicates(&list, "a", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", NULL);
+	t_string_list_remove_duplicates(&list, "a", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", "a", NULL);
+	t_string_list_remove_duplicates(&list, "a", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", "b", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "b", "b", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "b", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", "b", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "b", "b", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "b", "c", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", "b", "b", "c", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_create_string_list_dup(&list, 0, "a", "a", "a", "b", "b", "b",
+				 "c", "c", "c", NULL);
+	t_string_list_remove_duplicates(&list, "a", "b", "c", NULL);
+
+	t_string_list_clear(&list, 0);
+}