cleanup tests

22 files changed, 426 insertions, 553 deletions

diff --git a/test/diagnostics/ambiguity-1.lua b/test/diagnostics/ambiguity-1.lua
new file mode 100644
index 00000000..6b8e41da
--- /dev/null
+++ b/test/diagnostics/ambiguity-1.lua
@@ -0,0 +1,29 @@
+TEST [[
+local x
+x = <!x or 0 + 1!>
+]]
+
+TEST [[
+local x, y
+x = <!x + y or 0!>
+]]
+
+TEST [[
+local x, y, z
+x = x and y or '' .. z
+]]
+
+TEST [[
+local x
+x = x or -1
+]]
+
+TEST [[
+local x
+x = x or (0 + 1)
+]]
+
+TEST [[
+local x, y
+x = (x + y) or 0
+]]
diff --git a/test/diagnostics/assign-type-mismatch.lua b/test/diagnostics/assign-type-mismatch.lua
index 5aacb168..d4632563 100644
--- a/test/diagnostics/assign-type-mismatch.lua
+++ b/test/diagnostics/assign-type-mismatch.lua
@@ -465,3 +465,10 @@ local arr2 = {
     <!3!>, -- no warnings
 }
 ]]
+
+TEST [[
+local t = {}
+t.a = 1
+t.a = 2
+return t
+]]
diff --git a/test/diagnostics/close-non-object.lua b/test/diagnostics/close-non-object.lua
new file mode 100644
index 00000000..10f207f0
--- /dev/null
+++ b/test/diagnostics/close-non-object.lua
@@ -0,0 +1,11 @@
+TEST [[
+local _ <close> = <!1!>
+]]
+
+TEST [[
+local _ <close> = <!''!>
+]]
+
+TEST [[
+local c <close> = <!(function () return 1 end)()!>
+]]
diff --git a/test/diagnostics/code-after-break.lua b/test/diagnostics/code-after-break.lua
new file mode 100644
index 00000000..a150948b
--- /dev/null
+++ b/test/diagnostics/code-after-break.lua
@@ -0,0 +1,7 @@
+TEST [[
+while true do
+    break
+    <!print()
+    print()!>
+end
+]]
diff --git a/test/diagnostics/common.lua b/test/diagnostics/common.lua
index e0a3e342..24ec4c8c 100644
--- a/test/diagnostics/common.lua
+++ b/test/diagnostics/common.lua
@@ -1,455 +1,12 @@
 local config = require 'config'
 local util   = require 'utility'
 
-TEST [[
-local function x(a, b)
-    return a, b
-end
-x(1)
-]]
-
-TEST [[
----@param a integer
----@param b integer
-local function x(a, b)
-    return a, b
-end
-<!x(1)!>
-]]
-
-TEST [[
----@param a integer
----@param b integer
-local function x(a, b)
-    return a, b
-end
-<!x()!>
-]]
-
-TEST [[
----@param a integer
----@param b integer
----@param ... integer
-local function x(a, b, ...)
-    return a, b, ...
-end
-x(1, 2)
-]]
-
-TEST [[
----@param a integer
----@param b integer
-local function f(a, b)
-end
-
-f(...)
-]]
-
-TEST [[
----@param a integer
----@param b integer
-local function f(a, b)
-end
-
-local function return2Numbers()
-    return 1, 2
-end
-
-f(return2Numbers())
-]]
-
-TEST [[
----@param a integer
----@param b? integer
-local function x(a, b)
-    return a, b
-end
-x(1)
-]]
-
-TEST [[
----@param b integer?
-local function x(a, b)
-    return a, b
-end
-x(1)
-]]
-
-TEST [[
----@param b integer|nil
-local function x(a, b)
-    return a, b
-end
-x(1)
-]]
-
-TEST [[
-local m = {}
-function m.x()
-end
-m:x()
-]]
-
-TEST [[
-InstanceName = 1
-Instance = _G[InstanceName]
-]]
-
-TEST [[
-local _ = (''):sub(1, 2)
-]]
-
-TEST [=[
-return [[   
-    
-]]
-]=]
-
-util.arrayInsert(disables, 'close-non-object')
-TEST [[
-local _ <close> = function () end
-]]
-util.arrayRemove(disables, 'close-non-object')
-
-TEST [[
-local _ <close> = <!1!>
-]]
-
-TEST [[
-local _ <close> = <!''!>
-]]
-
-TEST [[
-local c <close> = <!(function () return 1 end)()!>
-]]
-
-util.arrayInsert(disables, 'unused-local')
-TEST [[
-local f = <!function () end!>
-]]
-
-TEST [[
-local f;f = <!function () end!>
-]]
-
-TEST [[
-local <!function f() end!>
-]]
-
-TEST [[
-local <!function f()
-    f()
-end!>
-]]
-
-
-TEST [[
-local <!function test()
-end!>
-
-local <!function foo ()
-end!>
-]]
-
-util.arrayRemove(disables, 'unused-local')
-TEST [[
-local mt, x
-function mt:m()
-    function x:m()
-    end
-end
-return mt, x
-]]
-
-TEST [[
-local mt = {}
-function mt:f()
-end
-return mt
-]]
-
-TEST [[
-local <!mt!> = {}
-function <!mt!>:f()
-end
-]]
-
-TEST [[
-local <!x!> = {}
-<!x!>.a = 1
-]]
-
-TEST [[
-local <!x!> = {}
-<!x!>['a'] = 1
-]]
-
-TEST [[
-local function f(<!self!>)
-    return 'something'
-end
-f()
-]]
-
-TEST [[
-local function f(<!...!>)
-    return 'something'
-end
-f()
-]]
-
-TEST [[
-local function f(var)
-    print(var)
-end
-local var
-f(var)
-]]
-
-TEST [[
-local function f(a, b)
-    return a, b
-end
-f(1, 2, <!3!>, <!4!>)
-]]
-
-TEST [[
-local mt = {}
-function mt:f(a, b)
-    return a, b
-end
-mt.f(mt, 2, 3, <!4!>)
-]]
-
-
-TEST [[
-local mt = {}
-function mt.f(a, b)
-    return a, b
-end
-mt:f(1, <!2!>, <!3!>, <!4!>)
-]]
-
-TEST [[
-local mt = {}
-function mt:f(a, b)
-    return a, b
-end
-mt:f(1, 2, <!3!>, <!4!>)
-]]
-
-TEST [[
-local function f(a, b, ...)
-    return a, b, ...
-end
-f(1, 2, 3, 4)
-]]
-
-TEST [[
-local _ = next({}, 1, <!2!>)
-print(1, 2, 3, 4, 5)
-]]
-
-TEST [[
-local function f(callback)
-    callback(1, 2, 3)
-end
-f(function () end)
-]]
-
---TEST [[
---local realTostring = tostring
---tostring = function () end
---tostring(<!1!>)
---tostring = realTostring
---tostring(1)
---]]
-
-TEST [[
-<!aa!> = 1
-tostring = 1
-ROOT = 1
-_G.bb = 1
-]]
-
-TEST [[
-local f = load('')
-if f then
-    f(1, 2, 3)
-end
-]]
-
-TEST [[
-local _ = <!unpack!>
-]]
-
-TEST [[
-X = table[<!x!>]
-]]
-
-TEST [[
-return {
-    <!x!> = 1,
-    y = 2,
-    <!x!> = 3,
-}
-]]
 
-TEST [[
-return {
-    x = 1,
-    y = 2,
-}, {
-    x = 1,
-    y = 2,
-}
-]]
-
-TEST [[
-local m = {}
-function m.open()
-end
-
-m:open()
-]]
-
-TEST [[
-local m = {}
-function m:open()
-end
 
-m.open(m)
-]]
 
-TEST [[
-<!if true then
-end!>
-]]
 
-TEST [[
-<!if true then
-else
-end!>
-]]
 
-TEST [[
-if true then
-else
-    return
-end
-]]
 
-TEST [[
-while true do
-end
-]]
-
-TEST [[
-<!for _ = 1, 10 do
-end!>
-]]
-
-TEST [[
-<!for _ in pairs({}) do
-end!>
-]]
-
-TEST [[
-local _ = 1, <!2!>
-]]
-
-TEST [[
-_ = 1, <!2!>
-]]
-
-TEST [[
-function X()
-    do
-        local k
-        print(k)
-    end
-    local k = 1
-    print(k)
-end
-]]
-
-TEST [[
-function X()
-    local loc
-    print(loc)
-end
-]]
-
-TEST [[
-local <!t!> = {}
-<!t!>[1] = 1
-]]
-
-TEST [[
-T1 = 1
-_ENV.T2 = 1
-_G.T3 = 1
-_ENV._G.T4 = 1
-_G._G._G.T5 = 1
-rawset(_G, 'T6', 1)
-rawset(_ENV, 'T7', 1)
-print(T1)
-print(T2)
-print(T3)
-print(T4)
-print(T5)
-print(T6)
-print(T7)
-]]
-
-TEST [[
-local x
-x = <!x or 0 + 1!>
-]]
-
-TEST [[
-local x, y
-x = <!x + y or 0!>
-]]
-
-TEST [[
-local x, y, z
-x = x and y or '' .. z
-]]
-
-TEST [[
-local x
-x = x or -1
-]]
-
-TEST [[
-local x
-x = x or (0 + 1)
-]]
-
-TEST [[
-local x, y
-x = (x + y) or 0
-]]
-
-TEST [[
-local t = {}
-t.a = 1
-t.a = 2
-return t
-]]
-
-TEST [[
-table.insert({}, 1, 2, <!3!>)
-]]
-
-TEST [[
-while true do
-    break
-    <!print()
-    print()!>
-end
-]]
 
 TEST [[
 local x, <!y!>, <!z!> = 1
diff --git a/test/diagnostics/deprecated.lua b/test/diagnostics/deprecated.lua
new file mode 100644
index 00000000..1086ecb2
--- /dev/null
+++ b/test/diagnostics/deprecated.lua
@@ -0,0 +1,3 @@
+TEST [[
+local _ = <!unpack!>
+]]
diff --git a/test/diagnostics/duplicate-doc-field.lua b/test/diagnostics/duplicate-doc-field.lua
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/test/diagnostics/duplicate-doc-field.lua
diff --git a/test/diagnostics/duplicate-index.lua b/test/diagnostics/duplicate-index.lua
new file mode 100644
index 00000000..feb5381d
--- /dev/null
+++ b/test/diagnostics/duplicate-index.lua
@@ -0,0 +1,17 @@
+TEST [[
+return {
+    <!x!> = 1,
+    y = 2,
+    <!x!> = 3,
+}
+]]
+
+TEST [[
+return {
+    x = 1,
+    y = 2,
+}, {
+    x = 1,
+    y = 2,
+}
+]]
diff --git a/test/diagnostics/empty-block.lua b/test/diagnostics/empty-block.lua
new file mode 100644
index 00000000..750397a4
--- /dev/null
+++ b/test/diagnostics/empty-block.lua
@@ -0,0 +1,32 @@
+TEST [[
+<!if true then
+end!>
+]]
+
+TEST [[
+<!if true then
+else
+end!>
+]]
+
+TEST [[
+if true then
+else
+    return
+end
+]]
+
+TEST [[
+while true do
+end
+]]
+
+TEST [[
+<!for _ = 1, 10 do
+end!>
+]]
+
+TEST [[
+<!for _ in pairs({}) do
+end!>
+]]
diff --git a/test/diagnostics/incomplete-signature-doc.lua b/test/diagnostics/incomplete-signature-doc.lua
index 6c529a62..7cd144c0 100644
--- a/test/diagnostics/incomplete-signature-doc.lua
+++ b/test/diagnostics/incomplete-signature-doc.lua
@@ -1,30 +1,3 @@
-local config = require 'config'
-local util   = require 'utility'
-
--- disable all default groups to make isolated tests
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{
-    ['ambiguity']     = 'None',
-    ['await']         = 'None',
-    ['codestyle']     = 'None',
-    ['conventions']   = 'None',
-    ['duplicate']     = 'None',
-    ['global']        = 'None',
-    ['luadoc']        = 'None',
-    ['redefined']     = 'None',
-    ['strict']        = 'None',
-    ['strong']        = 'None',
-    ['type-check']    = 'None',
-    ['unbalanced']    = 'None',
-    ['unused']        = 'None'
-})
-
--- enable single diagnostic that is to be tested
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{
-    ['incomplete-signature-doc'] = 'Any!' -- override groupFileStatus
-})
-
 -- -------------------------------------
 -- about the structure of these test cases
 --
@@ -42,6 +15,7 @@ config.set(nil, 'Lua.diagnostics.neededFileStatus',
 
 -- global functions no parameter, no return value
 -- no incomplete signature docs possible
+
 TEST [[
 function FG0()
 end
@@ -422,11 +396,3 @@ end
 
 local vpr4 = FLPR4(0)
 ]]
-
--- reset configurations
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.globals',
-{})
\ No newline at end of file
diff --git a/test/diagnostics/init.lua b/test/diagnostics/init.lua
index 302bb0a9..3fb90f39 100644
--- a/test/diagnostics/init.lua
+++ b/test/diagnostics/init.lua
@@ -88,9 +88,18 @@ check 'return-type-mismatch'
 check 'missing-return'
 check 'missing-return-value'
 check 'redundant-return-value'
-require 'diagnostics.incomplete-signature-doc'
-require 'diagnostics.missing-global-doc'
-require 'diagnostics.missing-local-export-doc'
+check 'incomplete-signature-doc'
+check 'missing-global-doc'
+check 'missing-local-export-doc'
 check 'global-element'
+check 'missing-parameter'
+check 'close-non-object'
+check 'duplicate-doc-field'
+check 'lowercase-global'
+check 'deprecated'
+check 'duplicate-index'
+check 'empty-block'
+check 'redundant-value'
+check 'code-after-block'
 
 require 'diagnostics.common'
diff --git a/test/diagnostics/lowercase-global.lua b/test/diagnostics/lowercase-global.lua
new file mode 100644
index 00000000..5e1d70a9
--- /dev/null
+++ b/test/diagnostics/lowercase-global.lua
@@ -0,0 +1,6 @@
+TEST [[
+<!aa!> = 1
+tostring = 1
+ROOT = 1
+_G.bb = 1
+]]
diff --git a/test/diagnostics/missing-global-doc.lua b/test/diagnostics/missing-global-doc.lua
index 2ebc237a..de5250fd 100644
--- a/test/diagnostics/missing-global-doc.lua
+++ b/test/diagnostics/missing-global-doc.lua
@@ -1,31 +1,3 @@
-local config = require 'config'
-local util   = require 'utility'
-
--- disable all default groups to make isolated tests
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{
-    ['ambiguity']     = 'None',
-    ['await']         = 'None',
-    ['codestyle']     = 'None',
-    ['conventions']   = 'None',
-    ['duplicate']     = 'None',
-    ['global']        = 'None',
-    ['luadoc']        = 'None',
-    ['redefined']     = 'None',
-    ['strict']        = 'None',
-    ['strong']        = 'None',
-    ['type-check']    = 'None',
-    ['unbalanced']    = 'None',
-    ['unused']        = 'None'
-})
-
--- enable single diagnostic that is to be tested
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{
-    ['missing-global-doc'] = 'Any!' -- override groupFileStatus
-})
-
-
 -- check global functions
 TEST [[
 <!function FG0()
@@ -323,11 +295,3 @@ end
 
 local vpr4 = FLPR4(0)
 ]]
-
--- reset configurations
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.globals',
-{})
\ No newline at end of file
diff --git a/test/diagnostics/missing-local-export-doc.lua b/test/diagnostics/missing-local-export-doc.lua
index bdbf1cfb..3d942216 100644
--- a/test/diagnostics/missing-local-export-doc.lua
+++ b/test/diagnostics/missing-local-export-doc.lua
@@ -1,31 +1,3 @@
-local config = require 'config'
-local util   = require 'utility'
-
--- disable all default groups to make isolated tests
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{
-    ['ambiguity']     = 'None',
-    ['await']         = 'None',
-    ['codestyle']     = 'None',
-    ['conventions']   = 'None',
-    ['duplicate']     = 'None',
-    ['global']        = 'None',
-    ['luadoc']        = 'None',
-    ['redefined']     = 'None',
-    ['strict']        = 'None',
-    ['strong']        = 'None',
-    ['type-check']    = 'None',
-    ['unbalanced']    = 'None',
-    ['unused']        = 'None'
-})
-
--- enable single diagnostic that is to be tested
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{
-    ['missing-local-export-doc'] = 'Any!' -- override groupFileStatus
-})
-
-
 -- check global functions
 TEST [[
 local mod = {}
@@ -201,11 +173,3 @@ mod.flpr3 = flpr3
 mod.flpr4 = flpr4
 return mod
 ]]
-
--- reset configurations
-config.set(nil, 'Lua.diagnostics.groupFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.neededFileStatus',
-{})
-config.set(nil, 'Lua.diagnostics.globals',
-{})
\ No newline at end of file
diff --git a/test/diagnostics/missing-parameter.lua b/test/diagnostics/missing-parameter.lua
new file mode 100644
index 00000000..91e9b88d
--- /dev/null
+++ b/test/diagnostics/missing-parameter.lua
@@ -0,0 +1,82 @@
+
+TEST [[
+local function x(a, b)
+    return a, b
+end
+x(1)
+]]
+
+TEST [[
+---@param a integer
+---@param b integer
+local function x(a, b)
+    return a, b
+end
+<!x(1)!>
+]]
+
+TEST [[
+---@param a integer
+---@param b integer
+local function x(a, b)
+    return a, b
+end
+<!x()!>
+]]
+
+TEST [[
+---@param a integer
+---@param b integer
+---@param ... integer
+local function x(a, b, ...)
+    return a, b, ...
+end
+x(1, 2)
+]]
+
+TEST [[
+---@param a integer
+---@param b integer
+local function f(a, b)
+end
+
+f(...)
+]]
+
+TEST [[
+---@param a integer
+---@param b integer
+local function f(a, b)
+end
+
+local function return2Numbers()
+    return 1, 2
+end
+
+f(return2Numbers())
+]]
+
+TEST [[
+---@param a integer
+---@param b? integer
+local function x(a, b)
+    return a, b
+end
+x(1)
+]]
+
+TEST [[
+---@param b integer?
+local function x(a, b)
+    return a, b
+end
+x(1)
+]]
+
+TEST [[
+---@param b integer|nil
+local function x(a, b)
+    return a, b
+end
+x(1)
+]]
diff --git a/test/diagnostics/redundant-parameter.lua b/test/diagnostics/redundant-parameter.lua
index b63d0987..cd9d7a43 100644
--- a/test/diagnostics/redundant-parameter.lua
+++ b/test/diagnostics/redundant-parameter.lua
@@ -41,3 +41,95 @@ function m.x(a, b)
 end
 m:x(1, <!2!>, <!3!>, <!4!>)
 ]]
+
+TEST [[
+local m = {}
+function m.x()
+end
+m:x()
+]]
+
+TEST [[
+local function f(a, b)
+    return a, b
+end
+f(1, 2, <!3!>, <!4!>)
+]]
+
+TEST [[
+local mt = {}
+function mt:f(a, b)
+    return a, b
+end
+mt.f(mt, 2, 3, <!4!>)
+]]
+
+TEST [[
+local mt = {}
+function mt.f(a, b)
+    return a, b
+end
+mt:f(1, <!2!>, <!3!>, <!4!>)
+]]
+
+TEST [[
+local mt = {}
+function mt:f(a, b)
+    return a, b
+end
+mt:f(1, 2, <!3!>, <!4!>)
+]]
+
+TEST [[
+local function f(a, b, ...)
+    return a, b, ...
+end
+f(1, 2, 3, 4)
+]]
+
+TEST [[
+local _ = next({}, 1, <!2!>)
+print(1, 2, 3, 4, 5)
+]]
+
+TEST [[
+local function f(callback)
+    callback(1, 2, 3)
+end
+f(function () end)
+]]
+
+--TEST [[
+--local realTostring = tostring
+--tostring = function () end
+--tostring(<!1!>)
+--tostring = realTostring
+--tostring(1)
+--]]
+
+TEST [[
+local f = load('')
+if f then
+    f(1, 2, 3)
+end
+]]
+
+TEST [[
+local m = {}
+function m.open()
+end
+
+m:open()
+]]
+
+TEST [[
+local m = {}
+function m:open()
+end
+
+m.open(m)
+]]
+
+TEST [[
+table.insert({}, 1, 2, <!3!>)
+]]
diff --git a/test/diagnostics/redundant-value.lua b/test/diagnostics/redundant-value.lua
new file mode 100644
index 00000000..a63544df
--- /dev/null
+++ b/test/diagnostics/redundant-value.lua
@@ -0,0 +1,7 @@
+TEST [[
+local _ = 1, <!2!>
+]]
+
+TEST [[
+_ = 1, <!2!>
+]]
diff --git a/test/diagnostics/trailing-space.lua b/test/diagnostics/trailing-space.lua
index be1458be..ff794714 100644
--- a/test/diagnostics/trailing-space.lua
+++ b/test/diagnostics/trailing-space.lua
@@ -24,3 +24,9 @@ TEST [[
 -- [=[  
    ]=]
 ]]
+
+TEST [=[
+return [[   
+    
+]]
+]=]
diff --git a/test/diagnostics/undefined-global.lua b/test/diagnostics/undefined-global.lua
index f3585d03..55ef5a00 100644
--- a/test/diagnostics/undefined-global.lua
+++ b/test/diagnostics/undefined-global.lua
@@ -9,3 +9,23 @@ print(Z)
 print(_G)
 Z = 1
 ]]
+
+TEST [[
+X = table[<!x!>]
+]]
+TEST [[
+T1 = 1
+_ENV.T2 = 1
+_G.T3 = 1
+_ENV._G.T4 = 1
+_G._G._G.T5 = 1
+rawset(_G, 'T6', 1)
+rawset(_ENV, 'T7', 1)
+print(T1)
+print(T2)
+print(T3)
+print(T4)
+print(T5)
+print(T6)
+print(T7)
+]]
diff --git a/test/diagnostics/unused-function.lua b/test/diagnostics/unused-function.lua
index 8f76bcdb..c2cea23a 100644
--- a/test/diagnostics/unused-function.lua
+++ b/test/diagnostics/unused-function.lua
@@ -19,3 +19,30 @@ local <!function y()
     x()
 end!>
 ]]
+
+TEST [[
+local f = <!function () end!>
+]]
+
+TEST [[
+local f;f = <!function () end!>
+]]
+
+TEST [[
+local <!function f() end!>
+]]
+
+TEST [[
+local <!function f()
+    f()
+end!>
+]]
+
+
+TEST [[
+local <!function test()
+end!>
+
+local <!function foo ()
+end!>
+]]
diff --git a/test/diagnostics/unused-local.lua b/test/diagnostics/unused-local.lua
index 4e8294bf..1faace25 100644
--- a/test/diagnostics/unused-local.lua
+++ b/test/diagnostics/unused-local.lua
@@ -23,3 +23,64 @@ TEST [[
 local <!t!> = {}
 <!t!>.a = 1
 ]]
+
+TEST [[
+InstanceName = 1
+Instance = _G[InstanceName]
+]]
+
+TEST [[
+local _ = (''):sub(1, 2)
+]]
+
+TEST [[
+local mt, x
+function mt:m()
+    function x:m()
+    end
+end
+return mt, x
+]]
+
+TEST [[
+local mt = {}
+function mt:f()
+end
+return mt
+]]
+
+TEST [[
+local <!mt!> = {}
+function <!mt!>:f()
+end
+]]
+
+TEST [[
+local <!x!> = {}
+<!x!>.a = 1
+]]
+
+TEST [[
+local <!x!> = {}
+<!x!>['a'] = 1
+]]
+
+TEST [[
+local function f(<!self!>)
+    return 'something'
+end
+f()
+]]
+
+TEST [[
+local function f(var)
+    print(var)
+end
+local var
+f(var)
+]]
+
+TEST [[
+local <!t!> = {}
+<!t!>[1] = 1
+]]
diff --git a/test/diagnostics/unused-vararg.lua b/test/diagnostics/unused-vararg.lua
new file mode 100644
index 00000000..2bed4aab
--- /dev/null
+++ b/test/diagnostics/unused-vararg.lua
@@ -0,0 +1,6 @@
+TEST [[
+local function f(<!...!>)
+    return 'something'
+end
+f()
+]]