test: reorg #15698

Problem:
Subdirectories like "visual", "insert", "normal" encourage people to
separate *related* tests for no good reason.  Typically the _mode_ is
not the relevant topic of a test (and when it is, _then_ create
an appropriate describe() or it()).

Solution:
- Delete the various `test/functional/<mode>/` subdirectories, move
  their tests to more meaningful topics.
- Rename `…/normal/` to `…/editor/`.
  - Move or merge `…/visual/*` and `…/insert/*` tests into here where
    appropriate.
- Rename `…/eval/` to `…/vimscript/`.
  - Move `…/viml/*` into here also.

* test(reorg): insert/* => editor/mode_insert_spec.lua
* test(reorg): cmdline/* => editor/mode_cmdline_spec.lua
* test(reorg): eval core tests => eval_spec.lua

1 files changed, 0 insertions, 80 deletions

diff --git a/test/functional/eval/environ_spec.lua b/test/functional/eval/environ_spec.lua
deleted file mode 100644
index 9e19568249..0000000000
--- a/test/functional/eval/environ_spec.lua
+++ /dev/null
@@ -1,80 +0,0 @@
-local helpers = require('test.functional.helpers')(after_each)
-local clear = helpers.clear
-local eq = helpers.eq
-local environ = helpers.funcs.environ
-local exists = helpers.funcs.exists
-local system = helpers.funcs.system
-local nvim_prog = helpers.nvim_prog
-local command = helpers.command
-local eval = helpers.eval
-local setenv = helpers.funcs.setenv
-
-describe('environment variables', function()
-  it('environ() handles empty env variable', function()
-    clear({env={EMPTY_VAR=""}})
-    eq("", environ()['EMPTY_VAR'])
-    eq(nil, environ()['DOES_NOT_EXIST'])
-  end)
-
-  it('exists() handles empty env variable', function()
-    clear({env={EMPTY_VAR=""}})
-    eq(1, exists('$EMPTY_VAR'))
-    eq(0, exists('$DOES_NOT_EXIST'))
-  end)
-end)
-
-describe('empty $HOME', function()
-  local original_home = os.getenv('HOME')
-
-  -- recover $HOME after each test
-  after_each(function()
-    if original_home ~= nil then
-      setenv('HOME', original_home)
-    end
-    os.remove('test_empty_home')
-    os.remove('./~')
-  end)
-
-  local function tilde_in_cwd()
-    -- get files in cwd
-    command("let test_empty_home_cwd_files = split(globpath('.', '*'), '\n')")
-    -- get the index of the file named '~'
-    command('let test_empty_home_tilde_index = index(test_empty_home_cwd_files, "./~")')
-    return eval('test_empty_home_tilde_index') ~= -1
-  end
-
-  local function write_and_test_tilde()
-    system({nvim_prog, '-u', 'NONE', '-i', 'NONE', '--headless',
-                                          '-c', 'write test_empty_home', '+q'})
-    eq(false, tilde_in_cwd())
-  end
-
-  it("'~' folder not created in cwd if $HOME and related env not defined", function()
-    command("unlet $HOME")
-    write_and_test_tilde()
-
-    command("let $HOMEDRIVE='C:'")
-    command("let $USERPROFILE='C:\\'")
-    write_and_test_tilde()
-
-    command("unlet $HOMEDRIVE")
-    write_and_test_tilde()
-
-    command("unlet $USERPROFILE")
-    write_and_test_tilde()
-
-    command("let $HOME='%USERPROFILE%'")
-    command("let $USERPROFILE='C:\\'")
-    write_and_test_tilde()
-  end)
-
-  it("'~' folder not created in cwd if writing a file with invalid $HOME", function()
-    setenv('HOME', '/path/does/not/exist')
-    write_and_test_tilde()
-  end)
-
-  it("'~' folder not created in cwd if writing a file with $HOME=''", function()
-    command("let $HOME=''")
-    write_and_test_tilde()
-  end)
-end)