eval: Add special variable type

1 files changed, 36 insertions, 0 deletions

diff --git a/test/functional/eval/special_vars_spec.lua b/test/functional/eval/special_vars_spec.lua
new file mode 100644
index 0000000000..7adc529c88
--- /dev/null
+++ b/test/functional/eval/special_vars_spec.lua
@@ -0,0 +1,36 @@
+local helpers = require('test.functional.helpers')
+local execute = helpers.execute
+local funcs = helpers.funcs
+local clear = helpers.clear
+local eval = helpers.eval
+
+describe('Special values', function()
+  before_each(clear)
+
+  it('do not cause error when freed', function()
+    execute([[
+      function Test()
+        try
+          return v:true
+        finally
+          return 'something else'
+        endtry
+      endfunction
+    ]])
+    eq(true, funcs.Test())
+  end)
+
+  it('work with empty()', function()
+    eq(0, funcs.empty(true))
+    eq(1, funcs.empty(false))
+    eq(1, funcs.empty(nil))
+    eq(1, eval('empty(v:none)'))
+  end)
+
+  it('can be stringified and eval’ed back', function()
+    eq(true, funcs.eval(funcs.string(true)))
+    eq(false, funcs.eval(funcs.string(false)))
+    eq(nil, funcs.eval(funcs.string(nil)))
+    eq(1, eval('eval(string(v:none)) is# v:none'))
+  end)
+end)