test: kill in fly hinting event

spec/unit/readerui_spec.lua

@@ -34,4 +34,11 @@ describe("Readerui module", function()
         readerui:closeDocument()
         assert(readerui.document == nil)
     end)
+    it("should not reset running_instance by mistake", function()
+        assert.is.truthy(readerui.document)
+        ReaderUI:new{
+            document = DocumentRegistry:openDocument(sample_epub)
+        }:onClose()
+        assert.is.truthy(readerui.document)
+    end)
 end)

spec/unit/readerview_spec.lua

@@ -0,0 +1,42 @@
+require("commonrequire")
+local DocumentRegistry = require("document/documentregistry")
+local Blitbuffer = require("ffi/blitbuffer")
+local ReaderUI = require("apps/reader/readerui")
+local UIManager = require("ui/uimanager")
+
+describe("Readerview module", function()
+    it("should stop hinting on document close event", function()
+        local sample_epub = "spec/front/unit/data/leaves.epub"
+        local readerui = ReaderUI:new{
+            document = DocumentRegistry:openDocument(sample_epub),
+        }
+        for i = #UIManager._task_queue, 1, -1 do
+            local task = UIManager._task_queue[i]
+            if task.action == readerui.view.emitHintPageEvent then
+                error("UIManager's task queue should be emtpy.")
+            end
+        end
+
+        local bb = Blitbuffer.new(1000, 1000)
+        readerui.view:drawSinglePage(bb, 0, 0)
+
+        local found = false
+        for i = #UIManager._task_queue, 1, -1 do
+            local task = UIManager._task_queue[i]
+            if task.action == readerui.view.emitHintPageEvent then
+                found = true
+            end
+        end
+        assert.is.truthy(found)
+
+        readerui:onClose()
+
+        assert.is.falsy(readerui.view.hinting)
+        for i = #UIManager._task_queue, 1, -1 do
+            local task = UIManager._task_queue[i]
+            if task.action == readerui.view.emitHintPageEvent then
+                error("UIManager's task queue should be emtpy.")
+            end
+        end
+    end)
+end)