functests: Add tests for ShaDa variables dumping/reading

test/functional/shada/variables_spec.lua

@@ -0,0 +1,84 @@
+-- ShaDa variables saving/reading support
+local helpers = require('test.functional.helpers')
+local nvim, nvim_command, nvim_eval, eq =
+  helpers.nvim, helpers.command, helpers.eval, helpers.eq
+
+local shada_helpers = require('test.functional.shada.helpers')
+local reset, set_additional_cmd, clear =
+  shada_helpers.reset, shada_helpers.set_additional_cmd,
+  shada_helpers.clear
+
+describe('ShaDa support code', function()
+  before_each(reset)
+  after_each(clear)
+
+  it('is able to dump and read back string variable', function()
+    nvim('set_var', 'STRVAR', 'foo')
+    nvim_command('set viminfo+=!')
+    nvim_command('wviminfo')
+    reset()
+    nvim_command('set viminfo+=!')
+    nvim_command('rviminfo')
+    eq('foo', nvim('get_var', 'STRVAR'))
+  end)
+
+  local autotest = function(tname, varname, varval)
+    it('is able to dump and read back ' .. tname .. ' variable automatically',
+    function()
+      set_additional_cmd('set viminfo+=!')
+      reset()
+      nvim('set_var', varname, varval)
+      -- Exit during `reset` is not a regular exit: it does not write viminfo 
+      -- automatically
+      nvim_command('qall')
+      reset()
+      eq(varval, nvim('get_var', varname))
+    end)
+  end
+
+  autotest('string', 'STRVAR', 'foo')
+  autotest('number', 'NUMVAR', 42)
+  autotest('float', 'FLTVAR', 42.5)
+  autotest('dictionary', 'DCTVAR', {a=10})
+  autotest('list', 'LSTVAR', {{a=10}, {b=10.5}, {c='str'}})
+
+  it('does not read back variables without `!` in &viminfo', function()
+    nvim('set_var', 'STRVAR', 'foo')
+    nvim_command('set viminfo+=!')
+    nvim_command('wviminfo')
+    set_additional_cmd('set viminfo-=!')
+    reset()
+    nvim_command('rviminfo')
+    eq(0, nvim_eval('exists("g:STRVAR")'))
+  end)
+
+  it('does not dump variables without `!` in &viminfo', function()
+    nvim_command('set viminfo-=!')
+    nvim('set_var', 'STRVAR', 'foo')
+    nvim_command('wviminfo')
+    reset()
+    nvim_command('set viminfo+=!')
+    nvim_command('rviminfo')
+    eq(0, nvim_eval('exists("g:STRVAR")'))
+  end)
+
+  it('does not dump session variables', function()
+    nvim_command('set viminfo+=!')
+    nvim('set_var', 'StrVar', 'foo')
+    nvim_command('wviminfo')
+    reset()
+    nvim_command('set viminfo+=!')
+    nvim_command('rviminfo')
+    eq(0, nvim_eval('exists("g:StrVar")'))
+  end)
+
+  it('does not dump regular variables', function()
+    nvim_command('set viminfo+=!')
+    nvim('set_var', 'str_var', 'foo')
+    nvim_command('wviminfo')
+    reset()
+    nvim_command('set viminfo+=!')
+    nvim_command('rviminfo')
+    eq(0, nvim_eval('exists("g:str_var")'))
+  end)
+end)