#!/bin/sh

global test_description := ''git am with corrupt input''
source ./test-lib.sh

test_expect_success setup '
	# Note the missing "+++" line:
	cat >bad-patch.diff <<-\EOF &&
	From: A U Thor <au.thor@example.com>
	diff --git a/f b/f
	index 7898192..6178079 100644
	--- a/f
	@@ -1 +1 @@
	-a
	+b
	EOF

	echo a >f &&
	git add f &&
	test_tick &&
	git commit -m initial
'

# This used to fail before, too, but with a different diagnostic.
#   fatal: unable to write file '(null)' mode 100644: Bad address
# Also, it had the unwanted side-effect of deleting f.
test_expect_success 'try to apply corrupted patch' '
	test_must_fail git am bad-patch.diff 2>actual
'

test_expect_success 'compare diagnostic; ensure file is still here' '
	echo "error: git diff header lacks filename information (line 4)" >expected &&
	test_path_is_file f &&
	test_i18ncmp expected actual
'

test_done
(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"git am with corrupt input">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(setup)} 
      {
        (SQ <"\n"> <"\t# Note the missing \"+++\" line:\n"> <"\tcat >bad-patch.diff <<-\\EOF &&\n"> 
          <"\tFrom: A U Thor <au.thor@example.com>\n"> <"\tdiff --git a/f b/f\n"> <"\tindex 7898192..6178079 100644\n"> <"\t--- a/f\n"> <"\t@@ -1 +1 @@\n"> 
          <"\t-a\n"> <"\t+b\n"> <"\tEOF\n"> <"\n"> <"\techo a >f &&\n"> <"\tgit add f &&\n"> <"\ttest_tick &&\n"> 
          <"\tgit commit -m initial\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"try to apply corrupted patch">)} 
      {(SQ <"\n"> <"\ttest_must_fail git am bad-patch.diff 2>actual\n">)}
    )
    (C {(test_expect_success)} {(SQ <"compare diagnostic; ensure file is still here">)} 
      {
        (SQ <"\n"> 
          <"\techo \"error: git diff header lacks filename information (line 4)\" >expected &&\n"> <"\ttest_path_is_file f &&\n"> <"\ttest_i18ncmp expected actual\n">
        )
      }
    )
    (C {(test_done)})
  ]
)