[PATCH 1/3] t0033: add tests for safe.directory

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <derrickstolee@github.com>

It is difficult to change the ownership on a directory in our test
suite, so insert a new GIT_TEST_ASSUME_DIFFERENT_OWNER environment
variable to trick Git into thinking we are in a differently-owned
directory. This allows us to test that the config is parsed correctly.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
 setup.c                   |  3 ++-
 t/t0033-safe-directory.sh | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100755 t/t0033-safe-directory.sh

diff --git a/setup.c b/setup.c
index c8f67bfed52..f54f449008a 100644
--- a/setup.c
+++ b/setup.c
@@ -1119,7 +1119,8 @@ static int ensure_valid_ownership(const char *path)
 {
 	struct safe_directory_data data = { .path = path };
 
-	if (is_path_owned_by_current_user(path))
+	if (is_path_owned_by_current_user(path) &&
+	    !git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0))
 		return 1;
 
 	read_very_early_config(safe_directory_cb, &data);
diff --git a/t/t0033-safe-directory.sh b/t/t0033-safe-directory.sh
new file mode 100755
index 00000000000..9380ff3d017
--- /dev/null
+++ b/t/t0033-safe-directory.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+test_description='verify safe.directory checks'
+
+. ./test-lib.sh
+
+GIT_TEST_ASSUME_DIFFERENT_OWNER=1
+export GIT_TEST_ASSUME_DIFFERENT_OWNER
+
+expect_rejected_dir () {
+	test_must_fail git status 2>err &&
+	grep "safe.directory" err
+}
+
+test_expect_success 'safe.directory is not set' '
+	expect_rejected_dir
+'
+
+test_expect_success 'safe.directory does not match' '
+	git config --global safe.directory bogus &&
+	expect_rejected_dir
+'
+
+test_expect_success 'safe.directory matches' '
+	git config --global --add safe.directory "$(pwd)" &&
+	git status
+'
+
+test_expect_success 'safe.directory matches, but is reset' '
+	git config --global --add safe.directory "" &&
+	expect_rejected_dir
+'
+
+test_done
-- 
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