tests: Migrate legacy test 74.

Helped-By: David Bürgin <676c7473@gmail.com>
Helped-By: Justin M. Keyes <justinkz@gmail.com>

test/functional/legacy/074_global_var_in_viminfo_spec.lua

@@ -0,0 +1,59 @@
+-- Tests for storing global variables in the .viminfo file
+
+local helpers, lfs = require('test.functional.helpers'), require('lfs')
+local clear, execute, eq, neq, eval, wait, spawn =
+  helpers.clear, helpers.execute, helpers.eq, helpers.neq, helpers.eval,
+  helpers.wait, helpers.spawn
+
+describe('storing global variables in viminfo files', function()
+  setup(function()
+    clear()
+    os.remove("Xviminfo")
+  end)
+
+  it('is working', function()
+    local nvim2 = helpers.spawn({helpers.nvim_prog, '-u', 'NONE', '--embed'})
+    helpers.set_session(nvim2)
+
+    local test_dict = {foo = 1, bar = 0, longvarible = 1000}
+    local test_list = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+      17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
+      35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
+      53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70,
+      71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88,
+      89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100}
+
+    execute(
+      -- This will cause a few errors, do it silently.
+      'set visualbell',
+      'set viminfo+=!',
+      "let MY_GLOBAL_DICT={'foo': 1, 'bar': 0, 'longvarible': 1000}",
+      -- Store a really long list, so line wrapping will occur in viminfo
+      -- file.
+      'let MY_GLOBAL_LIST=range(1,100)'
+    )
+    eq(test_dict, eval('MY_GLOBAL_DICT'))
+    eq(test_list, eval('MY_GLOBAL_LIST'))
+    -- Assert that the viminfo file does not exists.
+    eq(nil, lfs.attributes('Xviminfo'))
+    execute('wv! Xviminfo')
+    wait()
+    -- Assert that the viminfo file exists.
+    neq(nil, lfs.attributes('Xviminfo'))
+    execute('unlet MY_GLOBAL_DICT',
+	    'unlet MY_GLOBAL_LIST')
+    -- Assert that the variables where deleted.
+    eq(0, eval('exists("MY_GLOBAL_DICT")'))
+    eq(0, eval('exists("MY_GLOBAL_LIST")'))
+    execute('rv! Xviminfo')
+    -- Assert that the variables where restored.
+    eq(1, eval('exists("MY_GLOBAL_DICT")'))
+    eq(1, eval('exists("MY_GLOBAL_LIST")'))
+    eq(test_list, eval('MY_GLOBAL_LIST'))
+    eq(test_dict, eval('MY_GLOBAL_DICT'))
+  end)
+
+  teardown(function()
+    os.remove('Xviminfo')
+  end)
+end)