t5520: test work tree fast-forward when fetch updates head

Since b10ac50 (Fix pulling into the same branch., 2005-08-25), git-pull, upon detecting that git-fetch updated the current head, will fast-forward the working tree to the updated head commit. Implement tests to ensure that the fast-forward occurs in such a case, as well as to ensure that the user-friendly advice is printed upon failure. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Paul Tan committed May 29, 2015 at 19:44 UTC 9f992262fb8fdbac94f3a86f6bdf7182aab7feb6
1 file changed +21
t/t5520-pull.sh
+21
@@ -183,6 +183,27 @@ test_expect_success 'fail if the index has unresolved entries' '
183 test_cmp expected file
184 '
185
186 +test_expect_success 'fast-forwards working tree if branch head is updated' '
187 + git checkout -b third second^ &&
188 + test_when_finished "git checkout -f copy && git branch -D third" &&
189 + test "$(cat file)" = file &&
190 + git pull . second:third 2>err &&
191 + test_i18ngrep "fetch updated the current branch head" err &&
192 + test "$(cat file)" = modified &&
193 + test "$(git rev-parse third)" = "$(git rev-parse second)"
194 +'
195 +
196 +test_expect_success 'fast-forward fails with conflicting work tree' '
197 + git checkout -b third second^ &&
198 + test_when_finished "git checkout -f copy && git branch -D third" &&
199 + test "$(cat file)" = file &&
200 + echo conflict >file &&
201 + test_must_fail git pull . second:third 2>err &&
202 + test_i18ngrep "Cannot fast-forward your working tree" err &&
203 + test "$(cat file)" = conflict &&
204 + test "$(git rev-parse third)" = "$(git rev-parse second)"
205 +'
206 +
207 test_expect_success '--rebase' '
208 git branch to-rebase &&
209 echo modified again > file &&