[PATCH v5 4/6] dir_iterator: add tests for dir_iterator API

[Daniel Ferreira <bnmvco@gmail.com>]

Create t/helper/test-dir-iterator.c, which prints relevant information
about a directory tree iterated over with dir_iterator.

Create t/t0065-dir-iterator.sh, which tests that dir_iterator does
iterate through a whole directory tree and that post-order directory
iteration is correctly implemented.

Signed-off-by: Daniel Ferreira <bnmvco@gmail.com>
---
 Makefile                     |  1 +
 t/helper/test-dir-iterator.c | 32 +++++++++++++++++++++++++++++++
 t/t0065-dir-iterator.sh      | 45 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 t/helper/test-dir-iterator.c
 create mode 100755 t/t0065-dir-iterator.sh

diff --git a/Makefile b/Makefile
index a5a11e7..d0245f3 100644
--- a/Makefile
+++ b/Makefile
@@ -607,6 +607,7 @@ TEST_PROGRAMS_NEED_X += test-ctype
 TEST_PROGRAMS_NEED_X += test-config
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
+TEST_PROGRAMS_NEED_X += test-dir-iterator
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
 TEST_PROGRAMS_NEED_X += test-dump-split-index
 TEST_PROGRAMS_NEED_X += test-dump-untracked-cache
diff --git a/t/helper/test-dir-iterator.c b/t/helper/test-dir-iterator.c
new file mode 100644
index 0000000..b4a148f
--- /dev/null
+++ b/t/helper/test-dir-iterator.c
@@ -0,0 +1,32 @@
+#include "cache.h"
+#include "blob.h"
+#include "dir.h"
+#include "streaming.h"
+#include "iterator.h"
+#include "dir-iterator.h"
+
+int cmd_main(int argc, const char **argv) {
+	if (argc < 2) {
+		return 1;
+	}
+
+	struct strbuf path = STRBUF_INIT;
+	strbuf_add(&path, argv[1], strlen(argv[1]));
+
+	unsigned flag = 0;
+	if (argc == 3 && strcmp(argv[2], "--post-order") == 0)
+		flag = DIR_ITERATOR_POST_ORDER_TRAVERSAL;
+
+	struct dir_iterator *diter = dir_iterator_begin((&path)->buf, flag);
+
+	while (dir_iterator_advance(diter) == ITER_OK) {
+		if (S_ISDIR(diter->st.st_mode))
+			printf("[d] ");
+		else
+			printf("[f] ");
+
+		printf("(%s) %s\n", diter->relative_path, diter->path.buf);
+	}
+
+	return 0;
+}
diff --git a/t/t0065-dir-iterator.sh b/t/t0065-dir-iterator.sh
new file mode 100755
index 0000000..3c8ea9a
--- /dev/null
+++ b/t/t0065-dir-iterator.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+test_description='Test directory iteration.'
+
+. ./test-lib.sh
+
+ITER_SORTED_OUTPUT='[d] (a) ./dir/a
+[d] (a/b) ./dir/a/b
+[d] (a/b/c) ./dir/a/b/c
+[d] (d) ./dir/d
+[d] (d/e) ./dir/d/e
+[d] (d/e/d) ./dir/d/e/d
+[f] (a/b/c/d) ./dir/a/b/c/d
+[f] (a/e) ./dir/a/e
+[f] (b) ./dir/b
+[f] (c) ./dir/c
+[f] (d/e/d/a) ./dir/d/e/d/a'
+
+test_expect_success 'dir-iterator should iterate through all files' '
+	mkdir -p dir &&
+	mkdir -p dir/a/b/c/ &&
+	date >dir/b &&
+	date >dir/c &&
+	mkdir -p dir/d/e/d/ &&
+	date >dir/a/b/c/d &&
+	date >dir/a/e &&
+	date >dir/d/e/d/a &&
+
+	test-dir-iterator ./dir >it &&
+	test "$(sort it)" == "$ITER_SORTED_OUTPUT"
+'
+
+ITER_POST_ORDER_OUTPUT='[f] (a/b/c/d) ./dir2/a/b/c/d
+[d] (a/b/c) ./dir2/a/b/c
+[d] (a/b) ./dir2/a/b
+[d] (a) ./dir2/a'
+
+test_expect_success 'dir-iterator should list files properly on post-order mode' '
+	mkdir -p dir2/a/b/c/ &&
+	date >dir2/a/b/c/d &&
+
+	test "$(test-dir-iterator ./dir2 --post-order)" == "$ITER_POST_ORDER_OUTPUT"
+'
+
+test_done
-- 
2.7.4 (Apple Git-66)