Fix crlf issue with checkout tests

Move some checkout utility functions into a shared file and fix
some crlf filtering issues when verifying file contents.

tests-clar/checkout/checkout_helpers.c

+#include "clar_libgit2.h"
+#include "checkout_helpers.h"
+#include "refs.h"
+#include "fileops.h"
+
+/* this is essentially the code from git__unescape modified slightly */
+void strip_cr_from_buf(git_buf *buf)
+{
+	char *scan, *pos = buf->ptr, *end = pos + buf->size;
+
+	for (scan = pos; scan < end; pos++, scan++) {
+		if (*scan == '\r')
+			scan++; /* skip '\r' */
+		if (pos != scan)
+			*pos = *scan;
+	}
+
+	*pos = '\0';
+	buf->size = (pos - buf->ptr);
+}
+
+void assert_on_branch(git_repository *repo, const char *branch)
+{
+	git_reference *head;
+	git_buf bname = GIT_BUF_INIT;
+
+	cl_git_pass(git_reference_lookup(&head, repo, GIT_HEAD_FILE));
+	cl_assert_(git_reference_type(head) == GIT_REF_SYMBOLIC, branch);
+
+	cl_git_pass(git_buf_joinpath(&bname, "refs/heads", branch));
+	cl_assert_equal_s(bname.ptr, git_reference_symbolic_target(head));
+
+	git_reference_free(head);
+	git_buf_free(&bname);
+}
+
+void reset_index_to_treeish(git_object *treeish)
+{
+	git_object *tree;
+	git_index *index;
+	git_repository *repo = git_object_owner(treeish);
+
+	cl_git_pass(git_object_peel(&tree, treeish, GIT_OBJ_TREE));
+
+	cl_git_pass(git_repository_index(&index, repo));
+	cl_git_pass(git_index_read_tree(index, (git_tree *)tree));
+	cl_git_pass(git_index_write(index));
+
+	git_object_free(tree);
+	git_index_free(index);
+}
+
+static void test_file_contents_internal(
+	const char *path, const char *expectedcontents, bool strip_cr)
+{
+	int fd;
+	char data[1024] = {0};
+	git_buf buf = GIT_BUF_INIT;
+	size_t expectedlen = strlen(expectedcontents);
+
+	fd = p_open(path, O_RDONLY);
+	cl_assert(fd >= 0);
+
+	buf.ptr = data;
+	buf.size = p_read(fd, buf.ptr, 1024);
+
+	cl_git_pass(p_close(fd));
+
+	if (strip_cr)
+		strip_cr_from_buf(&buf);
+
+	cl_assert_equal_i((int)expectedlen, (int)buf.size);
+	cl_assert_equal_s(expectedcontents, buf.ptr);
+}
+
+void test_file_contents(const char *path, const char *expected)
+{
+	test_file_contents_internal(path, expected, false);
+}
+
+void test_file_contents_nocr(const char *path, const char *expected)
+{
+	test_file_contents_internal(path, expected, true);
+}

tests-clar/checkout/checkout_helpers.h

+#include "buffer.h"
+#include "git2/object.h"
+#include "git2/repository.h"
+
+extern void strip_cr_from_buf(git_buf *buf);
+extern void assert_on_branch(git_repository *repo, const char *branch);
+extern void reset_index_to_treeish(git_object *treeish);
+extern void test_file_contents(const char *path, const char *expected);
+extern void test_file_contents_nocr(const char *path, const char *expected);

tests-clar/checkout/index.c

 #include "clar_libgit2.h"
+#include "checkout_helpers.h"
 
 #include "git2/checkout.h"
 #include "repository.h"
 
 static git_repository *g_repo;
 
-static void reset_index_to_treeish(git_object *treeish)
-{
-	git_object *tree;
-	git_index *index;
-
-	cl_git_pass(git_object_peel(&tree, treeish, GIT_OBJ_TREE));
-
-	cl_git_pass(git_repository_index(&index, g_repo));
-	cl_git_pass(git_index_read_tree(index, (git_tree *)tree));
-	cl_git_pass(git_index_write(index));
-
-	git_object_free(tree);
-	git_index_free(index);
-}
-
 void test_checkout_index__initialize(void)
 {
 	git_tree *tree;
@@ -41,23 +27,6 @@ void test_checkout_index__cleanup(void)
 	cl_git_sandbox_cleanup();
 }
 
-static void test_file_contents(const char *path, const char *expectedcontents)
-{
-	int fd;
-	char buffer[1024] = {0};
-	size_t expectedlen, actuallen;
-
-	fd = p_open(path, O_RDONLY);
-	cl_assert(fd >= 0);
-
-	expectedlen = strlen(expectedcontents);
-	actuallen = p_read(fd, buffer, 1024);
-	cl_git_pass(p_close(fd));
-
-	cl_assert_equal_sz(actuallen, expectedlen);
-	cl_assert_equal_s(buffer, expectedcontents);
-}
-
 void test_checkout_index__cannot_checkout_a_bare_repository(void)
 {
 	test_checkout_index__cleanup();

tests-clar/checkout/tree.c

 #include "clar_libgit2.h"
+#include "checkout_helpers.h"
 
 #include "git2/checkout.h"
 #include "repository.h"
@@ -137,21 +138,6 @@ void test_checkout_tree__doesnt_write_unrequested_files_to_worktree(void)
   cl_assert_equal_i(false, git_path_isfile("testrepo/readme.txt"));
 }
 
-static void assert_on_branch(git_repository *repo, const char *branch)
-{
-	git_reference *head;
-	git_buf bname = GIT_BUF_INIT;
-
-	cl_git_pass(git_reference_lookup(&head, repo, GIT_HEAD_FILE));
-	cl_assert_(git_reference_type(head) == GIT_REF_SYMBOLIC, branch);
-
-	cl_git_pass(git_buf_joinpath(&bname, "refs/heads", branch));
-	cl_assert_equal_s(bname.ptr, git_reference_symbolic_target(head));
-
-	git_reference_free(head);
-	git_buf_free(&bname);
-}
-
 void test_checkout_tree__can_switch_branches(void)
 {
 	git_checkout_opts opts = GIT_CHECKOUT_OPTS_INIT;
@@ -241,28 +227,11 @@ void test_checkout_tree__can_remove_ignored(void)
 	cl_assert(!git_path_isfile("testrepo/ignored_file"));
 }
 
-/* this is essentially the code from git__unescape modified slightly */
-static void strip_cr_from_buf(git_buf *buf)
-{
-	char *scan, *pos = buf->ptr;
-
-	for (scan = pos; *scan; pos++, scan++) {
-		if (*scan == '\r')
-			scan++; /* skip '\r' */
-		if (pos != scan)
-			*pos = *scan;
-	}
-
-	*pos = '\0';
-	buf->size = (pos - buf->ptr);
-}
-
 void test_checkout_tree__can_update_only(void)
 {
 	git_checkout_opts opts = GIT_CHECKOUT_OPTS_INIT;
 	git_oid oid;
 	git_object *obj = NULL;
-	git_buf buf = GIT_BUF_INIT;
 
 	/* first let's get things into a known state - by checkout out the HEAD */
 
@@ -273,10 +242,7 @@ void test_checkout_tree__can_update_only(void)
 
 	cl_assert(!git_path_isdir("testrepo/a"));
 
-	cl_git_pass(git_futils_readbuffer(&buf, "testrepo/branch_file.txt"));
-	strip_cr_from_buf(&buf);
-	cl_assert_equal_s("hi\nbye!\n", buf.ptr);
-	git_buf_free(&buf);
+	test_file_contents_nocr("testrepo/branch_file.txt", "hi\nbye!\n");
 
 	/* now checkout branch but with update only */
 
@@ -297,11 +263,7 @@ void test_checkout_tree__can_update_only(void)
 	cl_assert(!git_path_isdir("testrepo/a"));
 
 	/* but this file still should have been updated */
-	cl_git_pass(git_futils_readbuffer(&buf, "testrepo/branch_file.txt"));
-	strip_cr_from_buf(&buf);
-	cl_assert_equal_s("hi\n", buf.ptr);
-
-	git_buf_free(&buf);
+	test_file_contents_nocr("testrepo/branch_file.txt", "hi\n");
 
 	git_object_free(obj);
 }