Add tests for get_children of containers

Fixes: https://github.com/awesomeWM/awesome/issues/1672
Signed-off-by: Uli Schlachter <psychon@znc.in>

spec/wibox/container/arcchart_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local arcchart = require("wibox.container.arcchart")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.arcchart", function()
+    it("common interfaces", function()
+        utils.test_container(arcchart())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/background_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local background = require("wibox.container.background")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.background", function()
+    it("common interfaces", function()
+        utils.test_container(background())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/constraint_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local constraint = require("wibox.container.constraint")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.constraint", function()
+    it("common interfaces", function()
+        utils.test_container(constraint())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/margin_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local margin = require("wibox.container.margin")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.margin", function()
+    it("common interfaces", function()
+        utils.test_container(margin())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/mirror_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local mirror = require("wibox.container.mirror")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.mirror", function()
+    it("common interfaces", function()
+        utils.test_container(mirror())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/place_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local place = require("wibox.container.place")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.place", function()
+    it("common interfaces", function()
+        utils.test_container(place())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/radialprogressbar_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local radialprogressbar = require("wibox.container.radialprogressbar")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.radialprogressbar", function()
+    it("common interfaces", function()
+        utils.test_container(radialprogressbar())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/rotate_spec.lua

@@ -0,0 +1,15 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+local rotate = require("wibox.container.rotate")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.rotate", function()
+    it("common interfaces", function()
+        utils.test_container(rotate())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/container/scroll_spec.lua

@@ -0,0 +1,17 @@
+---------------------------------------------------------------------------
+-- @author Uli Schlachter
+-- @copyright 2017 Uli Schlachter
+---------------------------------------------------------------------------
+
+package.loaded["gears.timer"] = {}
+
+local scroll = require("wibox.container.scroll")
+local utils = require("wibox.test_utils")
+
+describe("wibox.container.scroll", function()
+    it("common interfaces", function()
+        utils.test_container(scroll.horizontal())
+    end)
+end)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

spec/wibox/test_utils.lua

@@ -83,6 +83,26 @@ assert:register("assertion",
                 "assertion.widget_layout.positive")
 -- }}}
 
+local function test_container(container)
+    local w1 = base.empty_widget()
+
+    assert.is.same({}, container:get_children())
+
+    container:set_widget(w1)
+    assert.is.same({ w1 }, container:get_children())
+
+    container:set_widget(nil)
+    assert.is.same({}, container:get_children())
+
+    container:set_widget(w1)
+    assert.is.same({ w1 }, container:get_children())
+
+    if container.reset then
+        container:reset()
+        assert.is.same({}, container:get_children())
+    end
+end
+
 return {
     widget_stub = function(width, height)
         local w = object()
@@ -105,6 +125,8 @@ return {
 
         return w
     end,
+
+    test_container = test_container,
 }
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80