fix(priority): consider paused state when calling getCountsPerPriority (

#2748)

lib/commands/getCountsPerPriority-4.lua

@@ -0,0 +1,37 @@
+--[[
+  Get counts per provided states
+
+    Input:
+      KEYS[1] wait key
+      KEYS[2] paused key
+      KEYS[3] meta-paused key
+      KEYS[4] priority key
+
+      ARGV[1...] priorities
+]]
+local rcall = redis.call
+local results = {}
+local prioritizedKey = KEYS[4]
+
+-- Includes
+--- @include "includes/getTargetQueueList"
+
+for i = 1, #ARGV do
+  local priority = tonumber(ARGV[i])
+  if priority == 0 then
+    local target = getTargetQueueList(KEYS[3], KEYS[1], KEYS[2])
+    local count = rcall("LLEN", target) - rcall("ZCARD", prioritizedKey)
+    if count < 0 then
+      -- considering when last waiting job is moved to active before
+      -- removing priority reference
+      results[#results+1] = 0
+    else
+      results[#results+1] = count
+    end
+  else
+    results[#results+1] = rcall("ZCOUNT", prioritizedKey,
+      priority, priority)
+  end
+end
+
+return results

lib/scripts.js

@@ -84,7 +84,12 @@ const scripts = {
   },
 
   getCountsPerPriorityArgs(queue, priorities) {
-    const keys = [queue.keys.wait, queue.keys.priority];
+    const keys = [
+      queue.keys.wait,
+      queue.keys.paused,
+      queue.keys['meta-paused'],
+      queue.keys.priority
+    ];
 
     const args = priorities;
 

test/test_getters.js

@@ -192,6 +192,28 @@ describe('Jobs getters', function() {
         });
       });
     });
+
+    describe('when queue is paused', () => {
+      it('returns job counts per priority', async () => {
+        await queue.pause();
+        const jobsArray = Array.from(Array(42).keys()).map(index => ({
+          name: 'test',
+          data: {},
+          opts: {
+            priority: index % 4
+          }
+        }));
+        await queue.addBulk(jobsArray);
+        const counts = await queue.getCountsPerPriority([0, 1, 2, 3]);
+
+        expect(counts).to.be.eql({
+          '0': 11,
+          '1': 11,
+          '2': 10,
+          '3': 10
+        });
+      });
+    });  
   });
 
   it('fails jobs that exceed their specified timeout', done => {