grep "^| | gpg: Good signature" actual
'
+test_expect_success 'log --graph --no-walk is forbidden' '
+ test_must_fail git log --graph --no-walk
+'
+
+test_expect_success 'log diagnoses bogus HEAD' '
+ git init empty &&
+ test_must_fail git -C empty log 2>stderr &&
+ test_i18ngrep does.not.have.any.commits stderr &&
+ echo 1234abcd >empty/.git/refs/heads/master &&
+ test_must_fail git -C empty log 2>stderr &&
+ test_i18ngrep broken stderr &&
+ echo "ref: refs/heads/invalid.lock" >empty/.git/HEAD &&
+ test_must_fail git -C empty log 2>stderr &&
+ test_i18ngrep broken stderr &&
+ test_must_fail git -C empty log --default totally-bogus 2>stderr &&
+ test_i18ngrep broken stderr
+'
+
+ test_expect_success 'set up --source tests' '
+ git checkout --orphan source-a &&
+ test_commit one &&
+ test_commit two &&
+ git checkout -b source-b HEAD^ &&
+ test_commit three
+ '
+
+ test_expect_success 'log --source paints branch names' '
+ cat >expect <<-\EOF &&
+ 09e12a9 source-b three
+ 8e393e1 source-a two
+ 1ac6c77 source-b one
+ EOF
+ git log --oneline --source source-a source-b >actual &&
+ test_cmp expect actual
+ '
+
+ test_expect_success 'log --source paints tag names' '
+ git tag -m tagged source-tag &&
+ cat >expect <<-\EOF &&
+ 09e12a9 source-tag three
+ 8e393e1 source-a two
+ 1ac6c77 source-tag one
+ EOF
+ git log --oneline --source source-tag source-a >actual &&
+ test_cmp expect actual
+ '
+
test_done