t4054: test diff --no-index with stdin
"git diff --no-index" supports reading from stdin with the path "-". There is no test coverage for this so add a regression test before changing the code in the next commit. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Phillip Wood committed
Jul 5, 2023 at 20:49 UTC
df521462f01b61314c9c18a4b58a53db0cd7bf3c
1 file changed
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t/t4053-diff-no-index.sh
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@@ -205,6 +205,25 @@ test_expect_success POSIXPERM,SYMLINKS 'diff --no-index normalizes: mode not lik
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test_cmp expected actual
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'
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+test_expect_success "diff --no-index treats '-' as stdin" '
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+ cat >expect <<-EOF &&
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+ diff --git a/- b/a/1
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+ index $ZERO_OID..$(git hash-object --stdin <a/1) 100644
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+ --- a/-
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+ +++ b/a/1
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+ @@ -1 +1 @@
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+ -x
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+ +1
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+ EOF
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+
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+ test_write_lines x | test_expect_code 1 \
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+ git -c core.abbrev=no diff --no-index -- - a/1 >actual &&
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+ test_cmp expect actual &&
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+
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+ test_write_lines 1 | git diff --no-index -- a/1 - >actual &&
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+ test_must_be_empty actual
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+'
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+
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test_expect_success 'diff --no-index refuses to diff stdin and a directory' '
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test_must_fail git diff --no-index -- - a </dev/null 2>err &&
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grep "fatal: cannot compare stdin to a directory" err