test: fix tests

lua/frecency/async_finder.lua

@@ -1,7 +1,7 @@
 local a = require "plenary.async"
 local log = require "plenary.log"
 
----@class AsyncFinder: TelescopeFinder
+---@class AsyncFinder
 ---@field closed boolean
 ---@field entries FrecencyEntry[]
 ---@field rx { recv: fun(): table }

lua/frecency/entry_maker.lua

@@ -31,6 +31,7 @@ end
 
 ---@class FrecencyEntry
 ---@field filename string
+---@field index integer
 ---@field ordinal string
 ---@field name string
 ---@field score number

lua/frecency/tests/async_finder_spec.lua

@@ -0,0 +1,84 @@
+---@diagnostic disable: invisible
+local AsyncFinder = require "frecency.async_finder"
+local FS = require "frecency.fs"
+local EntryMaker = require "frecency.entry_maker"
+local WebDevicons = require "frecency.web_devicons"
+local util = require "frecency.tests.util"
+
+---@param files string[]
+---@param initial_results string[]
+---@param callback fun(async_finder: AsyncFinder, dir: PlenaryPath): nil
+local function with_files(files, initial_results, callback)
+  local dir, close = util.make_tree(files)
+  local fs = FS.new { ignore_patterns = {} }
+  local web_devicons = WebDevicons.new(true)
+  local function filepath_formatter()
+    return function(name)
+      return name
+    end
+  end
+  local entry_maker = EntryMaker.new(fs, web_devicons, { show_filter_column = false, show_scores = false })
+    :create(filepath_formatter, dir:absolute())
+  local async_finder = AsyncFinder.new(fs, dir:absolute(), entry_maker, initial_results)
+  callback(async_finder, dir)
+  close()
+end
+
+describe("async_finder", function()
+  ---@diagnostic disable-next-line: param-type-mismatch
+  if vim.version.eq(vim.version(), "0.9.0") then
+    it("skips these tests for v0.9.0", function()
+      assert.are.same(true, true)
+    end)
+    return
+  end
+
+  describe("with no initial_results", function()
+    local files = { "hoge1.txt", "hoge2.txt" }
+    with_files(files, {}, function(async_finder, dir)
+      local count = { process_result = 0, process_complete = 0 }
+      local results
+      local function run()
+        results = {}
+        async_finder("", function(result)
+          count.process_result = count.process_result + 1
+          table.insert(results, result.filename)
+        end, function()
+          count.process_complete = count.process_complete + 1
+        end)
+      end
+
+      describe("when run at the first time", function()
+        run()
+        it("called process_result() at 2 times", function()
+          assert.are.same(2, count.process_result)
+        end)
+        it("called process_complete() at 1 time", function()
+          assert.are.same(1, count.process_complete)
+        end)
+        it("returns the whole results", function()
+          assert.are.same({
+            dir:joinpath("hoge1.txt").filename,
+            dir:joinpath("hoge2.txt").filename,
+          }, results)
+        end)
+      end)
+
+      describe("when run again", function()
+        run()
+        it("called process_result() at 4 times", function()
+          assert.are.same(4, count.process_result)
+        end)
+        it("called process_complete() at 1 time", function()
+          assert.are.same(2, count.process_complete)
+        end)
+        it("returns the same results", function()
+          assert.are.same({
+            dir:joinpath("hoge1.txt").filename,
+            dir:joinpath("hoge2.txt").filename,
+          }, results)
+        end)
+      end)
+    end)
+  end)
+end)