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#!/bin/sh

test_description='git show'

. ./test-lib.sh

test_expect_success setup '
echo hello world >foo &&
H=$(git hash-object -w foo) &&
git tag -a foo-tag -m "Tags $H" $H &&
HH=$(expr "$H" : "\(..\)") &&
H38=$(expr "$H" : "..\(.*\)") &&
rm -f .git/objects/$HH/$H38
'

test_expect_success 'showing a tag that point at a missing object' '
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_done
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