#!/bin/sh
#
# Copyright (c) 2009 Christian Couder
#

global test_description := ''Tests for "git reset" with "--merge" and "--keep" options''

source ./test-lib.sh

test_expect_success setup '
    for i in 1 2 3; do echo line $i; done >file1 &&
    cat file1 >file2 &&
    git add file1 file2 &&
    test_tick &&
    git commit -m "Initial commit" &&
    git tag initial &&
    echo line 4 >>file1 &&
    cat file1 >file2 &&
    test_tick &&
    git commit -m "add line 4 to file1" file1 &&
    git tag second
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     C       C     C    D     --merge  D       D     D
# file2:     C       D     D    D     --merge  C       D     D
test_expect_success 'reset --merge is ok with changes in file it does not touch' '
    git reset --merge HEAD^ &&
    ! grep 4 file1 &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
    test -z "$(git diff --cached)"
'

test_expect_success 'reset --merge is ok when switching back' '
    git reset --merge second &&
    grep 4 file1 &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     C       C     C    D     --keep   D       D     D
# file2:     C       D     D    D     --keep   C       D     D
test_expect_success 'reset --keep is ok with changes in file it does not touch' '
    git reset --hard second &&
    cat file1 >file2 &&
    git reset --keep HEAD^ &&
    ! grep 4 file1 &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
    test -z "$(git diff --cached)"
'

test_expect_success 'reset --keep is ok when switching back' '
    git reset --keep second &&
    grep 4 file1 &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     B       B     C    D     --merge  D       D     D
# file2:     C       D     D    D     --merge  C       D     D
test_expect_success 'reset --merge discards changes added to index (1)' '
    git reset --hard second &&
    cat file1 >file2 &&
    echo "line 5" >> file1 &&
    git add file1 &&
    git reset --merge HEAD^ &&
    ! grep 4 file1 &&
    ! grep 5 file1 &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
    test -z "$(git diff --cached)"
'

test_expect_success 'reset --merge is ok again when switching back (1)' '
    git reset --hard initial &&
    echo "line 5" >> file2 &&
    git add file2 &&
    git reset --merge second &&
    ! grep 4 file2 &&
    ! grep 5 file1 &&
    grep 4 file1 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     B       B     C    D     --keep   (disallowed)
test_expect_success 'reset --keep fails with changes in index in files it touches' '
    git reset --hard second &&
    echo "line 5" >> file1 &&
    git add file1 &&
    test_must_fail git reset --keep HEAD^
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     C       C     C    D     --merge  D       D     D
# file2:     C       C     D    D     --merge  D       D     D
test_expect_success 'reset --merge discards changes added to index (2)' '
    git reset --hard second &&
    echo "line 4" >> file2 &&
    git add file2 &&
    git reset --merge HEAD^ &&
    ! grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
    test -z "$(git diff)" &&
    test -z "$(git diff --cached)"
'

test_expect_success 'reset --merge is ok again when switching back (2)' '
    git reset --hard initial &&
    git reset --merge second &&
    ! grep 4 file2 &&
    grep 4 file1 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     C       C     C    D     --keep   D       D     D
# file2:     C       C     D    D     --keep   C       D     D
test_expect_success 'reset --keep keeps changes it does not touch' '
    git reset --hard second &&
    echo "line 4" >> file2 &&
    git add file2 &&
    git reset --keep HEAD^ &&
    grep 4 file2 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
    test -z "$(git diff --cached)"
'

test_expect_success 'reset --keep keeps changes when switching back' '
    git reset --keep second &&
    grep 4 file2 &&
    grep 4 file1 &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     A       B     B    C     --merge  (disallowed)
test_expect_success 'reset --merge fails with changes in file it touches' '
    git reset --hard second &&
    echo "line 5" >> file1 &&
    test_tick &&
    git commit -m "add line 5" file1 &&
    sed -e "s/line 1/changed line 1/" <file1 >file3 &&
    mv file3 file1 &&
    test_must_fail git reset --merge HEAD^ 2>err.log &&
    grep file1 err.log | grep "not uptodate"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     A       B     B    C     --keep   (disallowed)
test_expect_success 'reset --keep fails with changes in file it touches' '
    git reset --hard second &&
    echo "line 5" >> file1 &&
    test_tick &&
    git commit -m "add line 5" file1 &&
    sed -e "s/line 1/changed line 1/" <file1 >file3 &&
    mv file3 file1 &&
    test_must_fail git reset --keep HEAD^ 2>err.log &&
    grep file1 err.log | grep "not uptodate"
'

test_expect_success 'setup 3 different branches' '
    git reset --hard second &&
    git branch branch1 &&
    git branch branch2 &&
    git branch branch3 &&
    git checkout branch1 &&
    echo "line 5 in branch1" >> file1 &&
    test_tick &&
    git commit -a -m "change in branch1" &&
    git checkout branch2 &&
    echo "line 5 in branch2" >> file1 &&
    test_tick &&
    git commit -a -m "change in branch2" &&
    git tag third &&
    git checkout branch3 &&
    echo a new file >file3 &&
    rm -f file1 &&
    git add file3 &&
    test_tick &&
    git commit -a -m "change in branch3"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     X       U     B    C     --merge  C       C     C
test_expect_success '"reset --merge HEAD^" is ok with pending merge' '
    git checkout third &&
    test_must_fail git merge branch1 &&
    git reset --merge HEAD^ &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
    test -z "$(git diff --cached)" &&
    test -z "$(git diff)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     X       U     B    C     --keep   (disallowed)
test_expect_success '"reset --keep HEAD^" fails with pending merge' '
    git reset --hard third &&
    test_must_fail git merge branch1 &&
    test_must_fail git reset --keep HEAD^ 2>err.log &&
    test_i18ngrep "middle of a merge" err.log
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     X       U     B    B     --merge  B       B     B
test_expect_success '"reset --merge HEAD" is ok with pending merge' '
    git reset --hard third &&
    test_must_fail git merge branch1 &&
    git reset --merge HEAD &&
    test "$(git rev-parse HEAD)" = "$(git rev-parse third)" &&
    test -z "$(git diff --cached)" &&
    test -z "$(git diff)"
'

# The next test will test the following:
#
#           working index HEAD target         working index HEAD
#           ----------------------------------------------------
# file1:     X       U     B    B     --keep   (disallowed)
test_expect_success '"reset --keep HEAD" fails with pending merge' '
    git reset --hard third &&
    test_must_fail git merge branch1 &&
    test_must_fail git reset --keep HEAD 2>err.log &&
    test_i18ngrep "middle of a merge" err.log
'

test_expect_success '--merge is ok with added/deleted merge' '
    git reset --hard third &&
    rm -f file2 &&
    test_must_fail git merge branch3 &&
    ! test -f file2 &&
    test -f file3 &&
    git diff --exit-code file3 &&
    git diff --exit-code branch3 file3 &&
    git reset --merge HEAD &&
    ! test -f file3 &&
    ! test -f file2 &&
    git diff --exit-code --cached
'

test_expect_success '--keep fails with added/deleted merge' '
    git reset --hard third &&
    rm -f file2 &&
    test_must_fail git merge branch3 &&
    ! test -f file2 &&
    test -f file3 &&
    git diff --exit-code file3 &&
    git diff --exit-code branch3 file3 &&
    test_must_fail git reset --keep HEAD 2>err.log &&
    test_i18ngrep "middle of a merge" err.log
'

test_done
(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"Tests for \"git reset\" with \"--merge\" and \"--keep\" options">)}
          spids: [13]
        )
      ]
      spids: [13]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(setup)} 
      {
        (SQ <"\n"> <"    for i in 1 2 3; do echo line $i; done >file1 &&\n"> 
          <"    cat file1 >file2 &&\n"> <"    git add file1 file2 &&\n"> <"    test_tick &&\n"> <"    git commit -m \"Initial commit\" &&\n"> 
          <"    git tag initial &&\n"> <"    echo line 4 >>file1 &&\n"> <"    cat file1 >file2 &&\n"> <"    test_tick &&\n"> 
          <"    git commit -m \"add line 4 to file1\" file1 &&\n"> <"    git tag second\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge is ok with changes in file it does not touch">)} 
      {
        (SQ <"\n"> <"    git reset --merge HEAD^ &&\n"> <"    ! grep 4 file1 &&\n"> 
          <"    grep 4 file2 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse initial)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge is ok when switching back">)} 
      {
        (SQ <"\n"> <"    git reset --merge second &&\n"> <"    grep 4 file1 &&\n"> 
          <"    grep 4 file2 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep is ok with changes in file it does not touch">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    cat file1 >file2 &&\n"> 
          <"    git reset --keep HEAD^ &&\n"> <"    ! grep 4 file1 &&\n"> <"    grep 4 file2 &&\n"> 
          <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse initial)\" &&\n"> <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep is ok when switching back">)} 
      {
        (SQ <"\n"> <"    git reset --keep second &&\n"> <"    grep 4 file1 &&\n"> 
          <"    grep 4 file2 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge discards changes added to index (1)">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    cat file1 >file2 &&\n"> 
          <"    echo \"line 5\" >> file1 &&\n"> <"    git add file1 &&\n"> <"    git reset --merge HEAD^ &&\n"> <"    ! grep 4 file1 &&\n"> 
          <"    ! grep 5 file1 &&\n"> <"    grep 4 file2 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse initial)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge is ok again when switching back (1)">)} 
      {
        (SQ <"\n"> <"    git reset --hard initial &&\n"> <"    echo \"line 5\" >> file2 &&\n"> 
          <"    git add file2 &&\n"> <"    git reset --merge second &&\n"> <"    ! grep 4 file2 &&\n"> <"    ! grep 5 file1 &&\n"> 
          <"    grep 4 file1 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep fails with changes in index in files it touches">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    echo \"line 5\" >> file1 &&\n"> 
          <"    git add file1 &&\n"> <"    test_must_fail git reset --keep HEAD^\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge discards changes added to index (2)">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    echo \"line 4\" >> file2 &&\n"> 
          <"    git add file2 &&\n"> <"    git reset --merge HEAD^ &&\n"> <"    ! grep 4 file2 &&\n"> 
          <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse initial)\" &&\n"> <"    test -z \"$(git diff)\" &&\n"> <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge is ok again when switching back (2)">)} 
      {
        (SQ <"\n"> <"    git reset --hard initial &&\n"> <"    git reset --merge second &&\n"> 
          <"    ! grep 4 file2 &&\n"> <"    grep 4 file1 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep keeps changes it does not touch">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    echo \"line 4\" >> file2 &&\n"> 
          <"    git add file2 &&\n"> <"    git reset --keep HEAD^ &&\n"> <"    grep 4 file2 &&\n"> 
          <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse initial)\" &&\n"> <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep keeps changes when switching back">)} 
      {
        (SQ <"\n"> <"    git reset --keep second &&\n"> <"    grep 4 file2 &&\n"> 
          <"    grep 4 file1 &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --merge fails with changes in file it touches">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    echo \"line 5\" >> file1 &&\n"> 
          <"    test_tick &&\n"> <"    git commit -m \"add line 5\" file1 &&\n"> 
          <"    sed -e \"s/line 1/changed line 1/\" <file1 >file3 &&\n"> <"    mv file3 file1 &&\n"> <"    test_must_fail git reset --merge HEAD^ 2>err.log &&\n"> 
          <"    grep file1 err.log | grep \"not uptodate\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"reset --keep fails with changes in file it touches">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    echo \"line 5\" >> file1 &&\n"> 
          <"    test_tick &&\n"> <"    git commit -m \"add line 5\" file1 &&\n"> 
          <"    sed -e \"s/line 1/changed line 1/\" <file1 >file3 &&\n"> <"    mv file3 file1 &&\n"> <"    test_must_fail git reset --keep HEAD^ 2>err.log &&\n"> 
          <"    grep file1 err.log | grep \"not uptodate\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"setup 3 different branches">)} 
      {
        (SQ <"\n"> <"    git reset --hard second &&\n"> <"    git branch branch1 &&\n"> 
          <"    git branch branch2 &&\n"> <"    git branch branch3 &&\n"> <"    git checkout branch1 &&\n"> 
          <"    echo \"line 5 in branch1\" >> file1 &&\n"> <"    test_tick &&\n"> <"    git commit -a -m \"change in branch1\" &&\n"> 
          <"    git checkout branch2 &&\n"> <"    echo \"line 5 in branch2\" >> file1 &&\n"> <"    test_tick &&\n"> 
          <"    git commit -a -m \"change in branch2\" &&\n"> <"    git tag third &&\n"> <"    git checkout branch3 &&\n"> <"    echo a new file >file3 &&\n"> 
          <"    rm -f file1 &&\n"> <"    git add file3 &&\n"> <"    test_tick &&\n"> <"    git commit -a -m \"change in branch3\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"\"reset --merge HEAD^\" is ok with pending merge">)} 
      {
        (SQ <"\n"> <"    git checkout third &&\n"> <"    test_must_fail git merge branch1 &&\n"> 
          <"    git reset --merge HEAD^ &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse second)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\" &&\n"> <"    test -z \"$(git diff)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"\"reset --keep HEAD^\" fails with pending merge">)} 
      {
        (SQ <"\n"> <"    git reset --hard third &&\n"> <"    test_must_fail git merge branch1 &&\n"> 
          <"    test_must_fail git reset --keep HEAD^ 2>err.log &&\n"> <"    test_i18ngrep \"middle of a merge\" err.log\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"\"reset --merge HEAD\" is ok with pending merge">)} 
      {
        (SQ <"\n"> <"    git reset --hard third &&\n"> <"    test_must_fail git merge branch1 &&\n"> 
          <"    git reset --merge HEAD &&\n"> <"    test \"$(git rev-parse HEAD)\" = \"$(git rev-parse third)\" &&\n"> 
          <"    test -z \"$(git diff --cached)\" &&\n"> <"    test -z \"$(git diff)\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"\"reset --keep HEAD\" fails with pending merge">)} 
      {
        (SQ <"\n"> <"    git reset --hard third &&\n"> <"    test_must_fail git merge branch1 &&\n"> 
          <"    test_must_fail git reset --keep HEAD 2>err.log &&\n"> <"    test_i18ngrep \"middle of a merge\" err.log\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"--merge is ok with added/deleted merge">)} 
      {
        (SQ <"\n"> <"    git reset --hard third &&\n"> <"    rm -f file2 &&\n"> 
          <"    test_must_fail git merge branch3 &&\n"> <"    ! test -f file2 &&\n"> <"    test -f file3 &&\n"> <"    git diff --exit-code file3 &&\n"> 
          <"    git diff --exit-code branch3 file3 &&\n"> <"    git reset --merge HEAD &&\n"> <"    ! test -f file3 &&\n"> <"    ! test -f file2 &&\n"> 
          <"    git diff --exit-code --cached\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"--keep fails with added/deleted merge">)} 
      {
        (SQ <"\n"> <"    git reset --hard third &&\n"> <"    rm -f file2 &&\n"> 
          <"    test_must_fail git merge branch3 &&\n"> <"    ! test -f file2 &&\n"> <"    test -f file3 &&\n"> <"    git diff --exit-code file3 &&\n"> 
          <"    git diff --exit-code branch3 file3 &&\n"> <"    test_must_fail git reset --keep HEAD 2>err.log &&\n"> 
          <"    test_i18ngrep \"middle of a merge\" err.log\n">
        )
      }
    )
    (C {(test_done)})
  ]
)