feat: quickfix (#293)

* feat: quickfix (not implemented)

* [WIP]: Wed 09 Dec 2020 11:11:30 PM EST

* somewhat working linked list impl

* getting closer

* might be working

* might be working for real

* works and implemented basic example

* dont forget to close prompt

* fix descending and add more tests

* test fixes

* fix test

* more logging

* Fix some more tests

* Fix logging messing up tests

* fix: lint

* fix: multi select stuffs

lua/tests/automated/entry_manager_spec.lua

@@ -0,0 +1,142 @@
+local EntryManager = require('telescope.entry_manager')
+
+local eq = assert.are.same
+
+describe('process_result', function()
+  it('works with one entry', function()
+    local manager = EntryManager:new(5, nil)
+
+    manager:add_entry(nil, 1, "hello")
+
+    eq(1, manager:get_score(1))
+  end)
+
+  it('works with two entries', function()
+    local manager = EntryManager:new(5, nil)
+
+    manager:add_entry(nil, 1, "hello")
+    manager:add_entry(nil, 2, "later")
+
+    eq(2, manager.linked_states.size)
+
+    eq("hello", manager:get_entry(1))
+    eq("later", manager:get_entry(2))
+  end)
+
+  it('calls functions when inserting', function()
+    local called_count = 0
+    local manager = EntryManager:new(5, function() called_count = called_count + 1 end)
+
+    assert(called_count == 0)
+    manager:add_entry(nil, 1, "hello")
+    assert(called_count == 1)
+  end)
+
+  it('calls functions when inserting twice', function()
+    local called_count = 0
+    local manager = EntryManager:new(5, function() called_count = called_count + 1 end)
+
+    assert(called_count == 0)
+    manager:add_entry(nil, 1, "hello")
+    manager:add_entry(nil, 2, "world")
+    assert(called_count == 2)
+  end)
+
+  it('correctly sorts lower scores', function()
+    local called_count = 0
+    local manager = EntryManager:new(5, function() called_count = called_count + 1 end)
+    manager:add_entry(nil, 5, "worse result")
+    manager:add_entry(nil, 2, "better result")
+
+    eq("better result", manager:get_entry(1))
+    eq("worse result", manager:get_entry(2))
+
+    eq(2, called_count)
+  end)
+
+  it('respects max results', function()
+    local called_count = 0
+    local manager = EntryManager:new(1, function() called_count = called_count + 1 end)
+    manager:add_entry(nil, 2, "better result")
+    manager:add_entry(nil, 5, "worse result")
+
+    eq("better result", manager:get_entry(1))
+    eq(1, called_count)
+  end)
+
+  it('should allow simple entries', function()
+    local manager = EntryManager:new(5)
+
+    local counts_executed = 0
+    manager:add_entry(nil, 1, setmetatable({}, {
+      __index = function(t, k)
+        local val = nil
+        if k == "ordinal" then
+          counts_executed = counts_executed + 1
+
+          -- This could be expensive, only call later
+          val = "wow"
+        end
+
+        rawset(t, k, val)
+        return val
+      end,
+    }))
+
+    eq("wow", manager:get_ordinal(1))
+    eq("wow", manager:get_ordinal(1))
+    eq("wow", manager:get_ordinal(1))
+
+    eq(1, counts_executed)
+  end)
+
+  it('should not loop a bunch', function()
+    local info = {}
+    local manager = EntryManager:new(5, nil, info)
+    manager:add_entry(nil, 4, "better result")
+    manager:add_entry(nil, 3, "better result")
+    manager:add_entry(nil, 2, "better result")
+
+    -- Loops once to find 3 < 4
+    -- Loops again to find 2 < 3
+    eq(2, info.looped)
+  end)
+
+  it('should not loop a bunch, part 2', function()
+    local info = {}
+    local manager = EntryManager:new(5, nil, info)
+    manager:add_entry(nil, 4, "better result")
+    manager:add_entry(nil, 2, "better result")
+    manager:add_entry(nil, 3, "better result")
+
+    -- Loops again to find 2 < 4
+    -- Loops once to find 3 > 2
+    --  but less than 4
+    eq(3, info.looped)
+  end)
+
+  it('should update worst score in all append case', function()
+    local manager = EntryManager:new(2, nil)
+    manager:add_entry(nil, 2, "result 2")
+    manager:add_entry(nil, 3, "result 3")
+    manager:add_entry(nil, 4, "result 4")
+
+    eq(3, manager.worst_acceptable_score)
+  end)
+
+  it('should update worst score in all prepend case', function()
+    local called_count = 0
+    local manager = EntryManager:new(2, function() called_count = called_count + 1 end)
+    manager:add_entry(nil, 5, "worse result")
+    manager:add_entry(nil, 4, "less worse result")
+    manager:add_entry(nil, 2, "better result")
+
+    -- Once for insert 5
+    -- Once for prepend 4
+    -- Once for prepend 2
+    eq(3, called_count)
+
+    eq("better result", manager:get_entry(1))
+    eq(4, manager.worst_acceptable_score)
+  end)
+end)