test_must_fail git --no-pager show foo-tag
'
+test_expect_success 'set up a bit of history' '
+ test_commit main1 &&
+ test_commit main2 &&
+ test_commit main3 &&
+ git tag -m "annotated tag" annotated &&
+ git checkout -b side HEAD^^ &&
+ test_commit side2 &&
+ test_commit side3
+'
+
+test_expect_success 'showing two commits' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main2)
+ commit $(git rev-parse main3)
+ EOF
+ git show main2 main3 >actual &&
+ grep ^commit actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing a range walks (linear)' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main3)
+ commit $(git rev-parse main2)
+ EOF
+ git show main1..main3 >actual &&
+ grep ^commit actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing a range walks (Y shape, ^ first)' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main3)
+ commit $(git rev-parse main2)
+ EOF
+ git show ^side3 main3 >actual &&
+ grep ^commit actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing a range walks (Y shape, ^ last)' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main3)
+ commit $(git rev-parse main2)
+ EOF
+ git show main3 ^side3 >actual &&
+ grep ^commit actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing with -N walks' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main3)
+ commit $(git rev-parse main2)
+ EOF
+ git show -2 main3 >actual &&
+ grep ^commit actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing annotated tag' '
+ cat >expect <<-EOF &&
+ tag annotated
+ commit $(git rev-parse annotated^{commit})
+ EOF
+ git show annotated >actual &&
+ grep -E "^(commit|tag)" actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing annotated tag plus commit' '
+ cat >expect <<-EOF &&
+ tag annotated
+ commit $(git rev-parse annotated^{commit})
+ commit $(git rev-parse side3)
+ EOF
+ git show annotated side3 >actual &&
+ grep -E "^(commit|tag)" actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success 'showing range' '
+ cat >expect <<-EOF &&
+ commit $(git rev-parse main3)
+ commit $(git rev-parse main2)
+ EOF
+ git show ^side3 annotated >actual &&
+ grep -E "^(commit|tag)" actual >actual.filtered &&
+ test_cmp expect actual.filtered
+'
+
+test_expect_success '-s suppresses diff' '
+ echo main3 >expect &&
+ git show -s --format=%s main3 >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--quiet suppresses diff' '
+ echo main3 >expect &&
+ git show --quiet --format=%s main3 >actual &&
+ test_cmp expect actual
+'
+
test_done