unittests: Run all unit tests in their own processes

Used

    sed -r -i -e '/ helpers =/ s/$/\nlocal itp = helpers.gen_itp(it)/; s/^(\s*)it\(/\1itp(/' test/unit/**/*_spec.lua

to alter all tests. Locally they all run fine now.

Reasoning:

1. General: state from one test should not affect other tests.
2. Local: travis build is failing with something which may be an output of
   garbage collector. This should prevent state of the garbage collector from
   interferring as well.

1 files changed, 6 insertions, 5 deletions

diff --git a/test/unit/option_spec.lua b/test/unit/option_spec.lua
index 8bab0194a2..b8bfeaf93e 100644
--- a/test/unit/option_spec.lua
+++ b/test/unit/option_spec.lua
@@ -1,4 +1,5 @@
 local helpers = require("test.unit.helpers")
+local itp = helpers.gen_itp(it)
 
 local to_cstr = helpers.to_cstr
 local eq      = helpers.eq
@@ -12,23 +13,23 @@ end
 
 describe('check_ff_value', function()
 
-  it('views empty string as valid', function()
+  itp('views empty string as valid', function()
     eq(1, check_ff_value(""))
   end)
 
-  it('views "unix", "dos" and "mac" as valid', function()
+  itp('views "unix", "dos" and "mac" as valid', function()
     eq(1, check_ff_value("unix"))
     eq(1, check_ff_value("dos"))
     eq(1, check_ff_value("mac"))
   end)
 
-  it('views "foo" as invalid', function()
+  itp('views "foo" as invalid', function()
     eq(0, check_ff_value("foo"))
   end)
 end)
 
 describe('get_sts_value', function()
-  it([[returns 'softtabstop' when it is non-negative]], function()
+  itp([[returns 'softtabstop' when it is non-negative]], function()
     globals.curbuf.b_p_sts = 5
     eq(5, option.get_sts_value())
 
@@ -36,7 +37,7 @@ describe('get_sts_value', function()
     eq(0, option.get_sts_value())
   end)
 
-  it([[returns "effective shiftwidth" when 'softtabstop' is negative]], function()
+  itp([[returns "effective shiftwidth" when 'softtabstop' is negative]], function()
     local shiftwidth = 2
     globals.curbuf.b_p_sw = shiftwidth
     local tabstop = 5