vim-patch:9.1.0661: the zip plugin is not tested. (#29993)

Problem:  the zip plugin is not tested.
Solution: include tests (Damien)

closes: vim/vim#15411

https://github.com/vim/vim/commit/d7af21e746f3992c650caf6b76465880b96302b4

Co-authored-by: Damien <141588647+xrandomname@users.noreply.github.com>

3 files changed, 140 insertions, 0 deletions

diff --git a/.github/workflows/test_windows.yml b/.github/workflows/test_windows.yml
index d92993a08c..db7ad93f55 100644
--- a/.github/workflows/test_windows.yml
+++ b/.github/workflows/test_windows.yml
@@ -60,6 +60,7 @@ jobs:
         uses: msys2/setup-msys2@v2
         with:
           update: true
+          install: unzip
           pacboy: >-
             make:p gcc:p diffutils:p
           release: false
diff --git a/test/old/testdir/samples/test.zip b/test/old/testdir/samples/test.zip
new file mode 100644
index 0000000000..6d34ac6992
--- /dev/null
+++ b/test/old/testdir/samples/test.zip
diff --git a/test/old/testdir/test_zip_plugin.vim b/test/old/testdir/test_zip_plugin.vim
new file mode 100644
index 0000000000..741e4ed91f
--- /dev/null
+++ b/test/old/testdir/test_zip_plugin.vim
@@ -0,0 +1,139 @@
+so check.vim
+
+CheckExecutable unzip
+
+if 0 " Find uncovered line
+  profile start zip_profile
+  profile! file */zip*.vim
+endif
+
+runtime plugin/zipPlugin.vim
+
+func Test_zip_basic()
+  let _sl = &shellslash
+  set noshellslash
+
+  "## get our zip file
+  if !filecopy("samples/test.zip", "X.zip")
+    call assert_report("Can't copy samples/test.zip")
+    return
+  endif
+  defer delete("X.zip")
+
+  e X.zip
+
+  "## Check header
+  call assert_match('^" zip\.vim version v\d\+', getline(1))
+  call assert_match('^" Browsing zipfile .*/X.zip', getline(2))
+  call assert_match('^" Select a file with cursor and press ENTER', getline(3))
+  call assert_match('^$', getline(4))
+
+  "## Check files listing
+  call assert_equal(["Xzip/", "Xzip/dir/", "Xzip/file.txt"], getline(5, 7))
+
+  "## Check ENTER on header
+  :1
+  exe ":normal \<cr>"
+  call assert_equal("X.zip", @%)
+
+  "## Check ENTER on directory
+  :1|:/^$//dir/
+  call assert_match('Please specify a file, not a directory',
+                  \ execute("normal \<CR>"))
+
+  "## Check ENTER on file
+  :1|:/^$//file/
+  exe ":normal \<cr>"
+  call assert_match('zipfile://.*/X.zip::Xzip/file.txt', @%)
+  call assert_equal('one', getline(1))
+
+  "## Check editing file
+  if executable("zip")
+    s/one/two/
+    call assert_equal("two", getline(1))
+    w
+    bw|bw
+    e X.zip
+
+    :1|:/^$//file/
+    exe "normal \<cr>"
+    call assert_equal("two", getline(1))
+  endif
+
+  only
+  e X.zip
+
+  "## Check extracting file
+  :1|:/^$//file/
+  normal x
+  call assert_true(filereadable("Xzip/file.txt"))
+  call delete("Xzip", "rf")
+
+  "## Check extracting directory
+  :1|:/^$//dir/
+  call assert_match('Please specify a file, not a directory', execute("normal x"))
+  call assert_equal("X.zip", @%)
+
+  "## Check "x" on header
+  :1
+  normal x
+  call assert_equal("X.zip", @%)
+  bw
+
+  "## Check opening zip when "unzip" program is missing
+  let save_zip_unzipcmd = g:zip_unzipcmd
+  let g:zip_unzipcmd = "/"
+  call assert_match('unzip not available on your system', execute("e X.zip"))
+
+  "## Check when "unzip" don't work
+  if executable("false")
+    let g:zip_unzipcmd = "false"
+    call assert_match('X\.zip is not a zip file', execute("e X.zip"))
+  endif
+  bw
+
+  let g:zip_unzipcmd = save_zip_unzipcmd
+  e X.zip
+
+  "## Check opening file when "unzip" is missing
+  let g:zip_unzipcmd = "/"
+  call assert_match('sorry, your system doesn''t appear to have the / program',
+                  \ execute("normal \<CR>"))
+
+  bw|bw
+  let g:zip_unzipcmd = save_zip_unzipcmd
+  e X.zip
+
+  "## Check :write when "zip" program is missing
+  :1|:/^$//file/
+  exe "normal \<cr>Goanother\<esc>"
+  let save_zip_zipcmd = g:zip_zipcmd
+  let g:zip_zipcmd = "/"
+  call assert_match('sorry, your system doesn''t appear to have the / program',
+                  \ execute("write"))
+
+  "## Check when "zip" report failure
+  if executable("false")
+    let g:zip_zipcmd = "false"
+    call assert_match('sorry, unable to update .*/X.zip with Xzip/file.txt',
+                    \ execute("write"))
+  endif
+  bw!|bw
+
+  let g:zip_zipcmd = save_zip_zipcmd
+
+  "## Check opening an no zipfile
+  call writefile(["qsdf"], "Xcorupt.zip", "D")
+  e! Xcorupt.zip
+  call assert_equal("qsdf", getline(1))
+
+  bw
+
+  "## Check no existing zipfile
+  call assert_match('File not readable', execute("e Xnot_exists.zip"))
+
+  bw
+
+  let &shellslash = _sl
+
+endfunc