test: add tests

Author: tomlau10

test/completion/common.lua

@@ -3138,6 +3138,44 @@ emit.on(emit, 'won', <??>)
     }
 }
 
+TEST [[
+--- @alias event.AAA "AAA"
+--- @alias event.BBB "BBB"
+
+--- @class Emit
+--- @field on fun(self: Emit, eventName: string, cb: function)
+--- @field on fun(self: Emit, eventName: event.AAA, cb: fun(i: integer))
+--- @field on fun(self: Emit, eventName: event.BBB, cb: fun(s: string))
+local emit = {}
+
+emit:on('AAA', <??>)
+]]
+{
+    [1] = {
+        label    = 'fun(i: integer)',
+        kind     = define.CompletionItemKind.Function,
+    }
+}
+
+TEST [[
+--- @alias event.AAA "AAA"
+--- @alias event.BBB "BBB"
+
+--- @class Emit
+--- @field on fun(self: Emit, eventName: string, cb: function)
+--- @field on fun(self: Emit, eventName: event.AAA, cb: fun(i: integer))
+--- @field on fun(self: Emit, eventName: event.BBB, cb: fun(s: string))
+local emit = {}
+
+emit:on('BBB', <??>)
+]]
+{
+    [1] = {
+        label    = 'fun(s: string)',
+        kind     = define.CompletionItemKind.Function,
+    }
+}
+
 TEST [[
 local function f()
     local inferCache

test/signature/init.lua

@@ -373,6 +373,40 @@ t:event("onTimer", <??>)
 '(method) (ev: "onTimer", <!t: integer!>)',
 }
 
+TEST [[
+---@alias event.onChat "onChat"
+---@alias event.onTimer "onTimer"
+
+---@class A
+---@field event fun(self: self, ev: event.onChat, c: string)
+---@field event fun(self: self, ev: event.onTimer, t: integer)
+
+---@type A
+local t
+
+t:event("onChat", <??>)
+]]
+{
+'(method) (ev: "onChat", <!c: string!>)',
+}
+
+TEST [[
+---@alias event.onChat "onChat"
+---@alias event.onTimer "onTimer"
+
+---@class A
+---@field event fun(self: self, ev: event.onChat, c: string)
+---@field event fun(self: self, ev: event.onTimer, t: integer)
+
+---@type A
+local t
+
+t:event("onTimer", <??>)
+]]
+{
+'(method) (ev: "onTimer", <!t: integer!>)',
+}
+
 local config = require 'config'
 config.set(nil, "Lua.type.inferParamType", true)