#!/bin/sh

global test_description := ''git checkout --patch''

source ./lib-patch-mode.sh

test_expect_success PERL 'setup' '
	mkdir dir &&
	echo parent > dir/foo &&
	echo dummy > bar &&
	git add bar dir/foo &&
	git commit -m initial &&
	test_tick &&
	test_commit second dir/foo head &&
	set_and_save_state bar bar_work bar_index &&
	save_head
'

# note: bar sorts before dir/foo, so the first 'n' is always to skip 'bar'

test_expect_success PERL 'saying "n" does nothing' '
	set_and_save_state dir/foo work head &&
	(echo n; echo n) | git checkout -p &&
	verify_saved_state bar &&
	verify_saved_state dir/foo
'

test_expect_success PERL 'git checkout -p' '
	(echo n; echo y) | git checkout -p &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'git checkout -p with staged changes' '
	set_state dir/foo work index &&
	(echo n; echo y) | git checkout -p &&
	verify_saved_state bar &&
	verify_state dir/foo index index
'

test_expect_success PERL 'git checkout -p HEAD with NO staged changes: abort' '
	set_and_save_state dir/foo work head &&
	(echo n; echo y; echo n) | git checkout -p HEAD &&
	verify_saved_state bar &&
	verify_saved_state dir/foo
'

test_expect_success PERL 'git checkout -p HEAD with NO staged changes: apply' '
	(echo n; echo y; echo y) | git checkout -p HEAD &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'git checkout -p HEAD with change already staged' '
	set_state dir/foo index index &&
	# the third n is to get out in case it mistakenly does not apply
	(echo n; echo y; echo n) | git checkout -p HEAD &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'git checkout -p HEAD^' '
	# the third n is to get out in case it mistakenly does not apply
	(echo n; echo y; echo n) | git checkout -p HEAD^ &&
	verify_saved_state bar &&
	verify_state dir/foo parent parent
'

test_expect_success PERL 'git checkout -p handles deletion' '
	set_state dir/foo work index &&
	rm dir/foo &&
	(echo n; echo y) | git checkout -p &&
	verify_saved_state bar &&
	verify_state dir/foo index index
'

# The idea in the rest is that bar sorts first, so we always say 'y'
# first and if the path limiter fails it'll apply to bar instead of
# dir/foo.  There's always an extra 'n' to reject edits to dir/foo in
# the failure case (and thus get out of the loop).

test_expect_success PERL 'path limiting works: dir' '
	set_state dir/foo work head &&
	(echo y; echo n) | git checkout -p dir &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'path limiting works: -- dir' '
	set_state dir/foo work head &&
	(echo y; echo n) | git checkout -p -- dir &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'path limiting works: HEAD^ -- dir' '
	# the third n is to get out in case it mistakenly does not apply
	(echo y; echo n; echo n) | git checkout -p HEAD^ -- dir &&
	verify_saved_state bar &&
	verify_state dir/foo parent parent
'

test_expect_success PERL 'path limiting works: foo inside dir' '
	set_state dir/foo work head &&
	# the third n is to get out in case it mistakenly does not apply
	(echo y; echo n; echo n) | (cd dir && git checkout -p foo) &&
	verify_saved_state bar &&
	verify_state dir/foo head head
'

test_expect_success PERL 'none of this moved HEAD' '
	verify_saved_head
'

test_done
(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"git checkout --patch">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./lib-patch-mode.sh)})
    (C {(test_expect_success)} {(PERL)} {(SQ <setup>)} 
      {
        (SQ <"\n"> <"\tmkdir dir &&\n"> <"\techo parent > dir/foo &&\n"> <"\techo dummy > bar &&\n"> 
          <"\tgit add bar dir/foo &&\n"> <"\tgit commit -m initial &&\n"> <"\ttest_tick &&\n"> <"\ttest_commit second dir/foo head &&\n"> 
          <"\tset_and_save_state bar bar_work bar_index &&\n"> <"\tsave_head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"saying \"n\" does nothing">)} 
      {
        (SQ <"\n"> <"\tset_and_save_state dir/foo work head &&\n"> 
          <"\t(echo n; echo n) | git checkout -p &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_saved_state dir/foo\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p">)} 
      {
        (SQ <"\n"> <"\t(echo n; echo y) | git checkout -p &&\n"> <"\tverify_saved_state bar &&\n"> 
          <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p with staged changes">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo work index &&\n"> 
          <"\t(echo n; echo y) | git checkout -p &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo index index\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p HEAD with NO staged changes: abort">)} 
      {
        (SQ <"\n"> <"\tset_and_save_state dir/foo work head &&\n"> 
          <"\t(echo n; echo y; echo n) | git checkout -p HEAD &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_saved_state dir/foo\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p HEAD with NO staged changes: apply">)} 
      {
        (SQ <"\n"> <"\t(echo n; echo y; echo y) | git checkout -p HEAD &&\n"> 
          <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p HEAD with change already staged">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo index index &&\n"> 
          <"\t# the third n is to get out in case it mistakenly does not apply\n"> <"\t(echo n; echo y; echo n) | git checkout -p HEAD &&\n"> <"\tverify_saved_state bar &&\n"> 
          <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p HEAD^">)} 
      {
        (SQ <"\n"> <"\t# the third n is to get out in case it mistakenly does not apply\n"> 
          <"\t(echo n; echo y; echo n) | git checkout -p HEAD^ &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo parent parent\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"git checkout -p handles deletion">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo work index &&\n"> <"\trm dir/foo &&\n"> 
          <"\t(echo n; echo y) | git checkout -p &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo index index\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"path limiting works: dir">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo work head &&\n"> 
          <"\t(echo y; echo n) | git checkout -p dir &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"path limiting works: -- dir">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo work head &&\n"> 
          <"\t(echo y; echo n) | git checkout -p -- dir &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"path limiting works: HEAD^ -- dir">)} 
      {
        (SQ <"\n"> <"\t# the third n is to get out in case it mistakenly does not apply\n"> 
          <"\t(echo y; echo n; echo n) | git checkout -p HEAD^ -- dir &&\n"> <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo parent parent\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"path limiting works: foo inside dir">)} 
      {
        (SQ <"\n"> <"\tset_state dir/foo work head &&\n"> 
          <"\t# the third n is to get out in case it mistakenly does not apply\n"> <"\t(echo y; echo n; echo n) | (cd dir && git checkout -p foo) &&\n"> 
          <"\tverify_saved_state bar &&\n"> <"\tverify_state dir/foo head head\n">
        )
      }
    )
    (C {(test_expect_success)} {(PERL)} {(SQ <"none of this moved HEAD">)} 
      {(SQ <"\n"> <"\tverify_saved_head\n">)}
    )
    (C {(test_done)})
  ]
)