fix: ensure worker removal impact is propated to worker choice strategy

[poolifier.git] / tests / pools / selection-strategies / selection-strategies.test.js

diff --git a/tests/pools/selection-strategies/selection-strategies.test.js b/tests/pools/selection-strategies/selection-strategies.test.js
index 64b26cd54c15426a61f857fe068f7466d11c814d..d09dde6f636f29cb3839888889cd0e9a0dd5979f 100644 (file)
--- a/tests/pools/selection-strategies/selection-strategies.test.js
+++ b/tests/pools/selection-strategies/selection-strategies.test.js
@@ -2,7 +2,8 @@ const { expect } = require('expect')
 const {
   WorkerChoiceStrategies,
   DynamicThreadPool,
-  FixedThreadPool
+  FixedThreadPool,
+  FixedClusterPool
 } = require('../../../lib/index')
 
 describe('Selection strategies test suite', () => {
@@ -11,7 +12,8 @@ describe('Selection strategies test suite', () => {
 
   it('Verify that WorkerChoiceStrategies enumeration provides string values', () => {
     expect(WorkerChoiceStrategies.ROUND_ROBIN).toBe('ROUND_ROBIN')
-    expect(WorkerChoiceStrategies.LESS_RECENTLY_USED).toBe('LESS_RECENTLY_USED')
+    expect(WorkerChoiceStrategies.LESS_USED).toBe('LESS_USED')
+    expect(WorkerChoiceStrategies.LESS_BUSY).toBe('LESS_BUSY')
     expect(WorkerChoiceStrategies.FAIR_SHARE).toBe('FAIR_SHARE')
     expect(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN).toBe(
       'WEIGHTED_ROUND_ROBIN'
@@ -41,7 +43,7 @@ describe('Selection strategies test suite', () => {
       WorkerChoiceStrategies.ROUND_ROBIN
     )
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerId
     ).toBe(0)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -68,8 +70,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(false)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -79,8 +80,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(false)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -125,6 +125,26 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
+  it('Verify ROUND_ROBIN strategy runtime behavior', async () => {
+    let pool = new FixedClusterPool(
+      max,
+      './tests/worker-files/cluster/testWorker.js'
+    )
+    let results = new Set()
+    for (let i = 0; i < max; i++) {
+      results.add(pool.chooseWorker()[1].id)
+    }
+    expect(results.size).toBe(max)
+    await pool.destroy()
+    pool = new FixedThreadPool(max, './tests/worker-files/thread/testWorker.js')
+    results = new Set()
+    for (let i = 0; i < max; i++) {
+      results.add(pool.chooseWorker()[1].threadId)
+    }
+    expect(results.size).toBe(max)
+    await pool.destroy()
+  })
+
   it('Verify ROUND_ROBIN strategy internals are resets after setting it', async () => {
     let pool = new FixedThreadPool(
       max,
@@ -132,11 +152,11 @@ describe('Selection strategies test suite', () => {
       { workerChoiceStrategy: WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN }
     )
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerId
     ).toBeUndefined()
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().nextWorkerId
     ).toBe(0)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -147,52 +167,51 @@ describe('Selection strategies test suite', () => {
     )
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.nextWorkerIndex
+        .workerChoiceStrategy.nextWorkerId
     ).toBeUndefined()
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.nextWorkerIndex
+        .workerChoiceStrategy.nextWorkerId
     ).toBe(0)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy is taken at pool creation', async () => {
+  it('Verify LESS_USED strategy is taken at pool creation', async () => {
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
-      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_USED }
     )
     expect(pool.opts.workerChoiceStrategy).toBe(
-      WorkerChoiceStrategies.LESS_RECENTLY_USED
+      WorkerChoiceStrategies.LESS_USED
     )
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy can be set after pool creation', async () => {
+  it('Verify LESS_USED strategy can be set after pool creation', async () => {
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
     )
-    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_USED)
     expect(pool.opts.workerChoiceStrategy).toBe(
-      WorkerChoiceStrategies.LESS_RECENTLY_USED
+      WorkerChoiceStrategies.LESS_USED
     )
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy default tasks usage statistics requirements', async () => {
+  it('Verify LESS_USED strategy default tasks usage statistics requirements', async () => {
     let pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
     )
-    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_USED)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(false)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -200,22 +219,21 @@ describe('Selection strategies test suite', () => {
       max,
       './tests/worker-files/thread/testWorker.js'
     )
-    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_USED)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(false)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy can be run in a fixed pool', async () => {
+  it('Verify LESS_USED strategy can be run in a fixed pool', async () => {
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
-      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_USED }
     )
-    // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose`
+    // TODO: Create a better test to cover `LessUsedWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
       promises.push(pool.execute())
@@ -225,14 +243,96 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy can be run in a dynamic pool', async () => {
+  it('Verify LESS_USED strategy can be run in a dynamic pool', async () => {
     const pool = new DynamicThreadPool(
       min,
       max,
       './tests/worker-files/thread/testWorker.js',
-      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_USED }
     )
-    // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose`
+    // TODO: Create a better test to cover `LessUsedWorkerChoiceStrategy#choose`
+    const promises = []
+    for (let i = 0; i < max * 2; i++) {
+      promises.push(pool.execute())
+    }
+    await Promise.all(promises)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LESS_BUSY strategy is taken at pool creation', async () => {
+    const pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
+    )
+    expect(pool.opts.workerChoiceStrategy).toBe(
+      WorkerChoiceStrategies.LESS_BUSY
+    )
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LESS_BUSY strategy can be set after pool creation', async () => {
+    const pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
+    expect(pool.opts.workerChoiceStrategy).toBe(
+      WorkerChoiceStrategies.LESS_BUSY
+    )
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LESS_BUSY strategy default tasks usage statistics requirements', async () => {
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LESS_BUSY strategy can be run in a fixed pool', async () => {
+    const pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
+    )
+    // TODO: Create a better test to cover `LessBusyWorkerChoiceStrategy#choose`
+    const promises = []
+    for (let i = 0; i < max * 2; i++) {
+      promises.push(pool.execute())
+    }
+    await Promise.all(promises)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LESS_BUSY strategy can be run in a dynamic pool', async () => {
+    const pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
+    )
+    // TODO: Create a better test to cover `LessBusyWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
       promises.push(pool.execute())
@@ -251,18 +351,18 @@ describe('Selection strategies test suite', () => {
     expect(pool.opts.workerChoiceStrategy).toBe(
       WorkerChoiceStrategies.FAIR_SHARE
     )
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workerLastVirtualTaskTimestamp.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerLastVirtualTaskTimestamp.get(worker).start
+          .workerLastVirtualTaskTimestamp.get(workerKey).start
       ).toBe(0)
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerLastVirtualTaskTimestamp.get(worker).end
+          .workerLastVirtualTaskTimestamp.get(workerKey).end
       ).toBe(0)
     }
     // We need to clean up the resources after our test
@@ -289,8 +389,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(true)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -300,8 +399,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(true)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -319,6 +417,10 @@ describe('Selection strategies test suite', () => {
       promises.push(pool.execute())
     }
     await Promise.all(promises)
+    expect(
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
+        .workerLastVirtualTaskTimestamp.size
+    ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
@@ -336,6 +438,10 @@ describe('Selection strategies test suite', () => {
       promises.push(pool.execute())
     }
     await Promise.all(promises)
+    // expect(
+    //   pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
+    //     .workerChoiceStrategy.workerLastVirtualTaskTimestamp.size
+    // ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
@@ -350,18 +456,18 @@ describe('Selection strategies test suite', () => {
         .workerLastVirtualTaskTimestamp
     ).toBeUndefined()
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workerLastVirtualTaskTimestamp.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerLastVirtualTaskTimestamp.get(worker).start
+          .workerLastVirtualTaskTimestamp.get(workerKey).start
       ).toBe(0)
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerLastVirtualTaskTimestamp.get(worker).end
+          .workerLastVirtualTaskTimestamp.get(workerKey).end
       ).toBe(0)
     }
     await pool.destroy()
@@ -375,18 +481,20 @@ describe('Selection strategies test suite', () => {
         .workerChoiceStrategy.workerLastVirtualTaskTimestamp
     ).toBeUndefined()
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workerChoiceStrategy.workerLastVirtualTaskTimestamp.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerChoiceStrategy.workerLastVirtualTaskTimestamp.get(worker).start
+          .workerChoiceStrategy.workerLastVirtualTaskTimestamp.get(workerKey)
+          .start
       ).toBe(0)
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerChoiceStrategy.workerLastVirtualTaskTimestamp.get(worker).end
+          .workerChoiceStrategy.workerLastVirtualTaskTimestamp.get(workerKey)
+          .end
       ).toBe(0)
     }
     // We need to clean up the resources after our test
@@ -403,29 +511,24 @@ describe('Selection strategies test suite', () => {
       WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
     )
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .previousWorkerIndex
-    ).toBe(0)
-    expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .currentWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().currentWorkerId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
         .defaultWorkerWeight
     ).toBeGreaterThan(0)
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workersTaskRunTime.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workersTaskRunTime.get(worker).weight
+          .workersTaskRunTime.get(workerKey).weight
       ).toBeGreaterThan(0)
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workersTaskRunTime.get(worker).runTime
+          .workersTaskRunTime.get(workerKey).runTime
       ).toBe(0)
     }
     // We need to clean up the resources after our test
@@ -452,8 +555,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(true)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -463,8 +565,7 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
     ).toBe(true)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -482,6 +583,10 @@ describe('Selection strategies test suite', () => {
       promises.push(pool.execute())
     }
     await Promise.all(promises)
+    expect(
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
+        .workersTaskRunTime.size
+    ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
@@ -499,6 +604,10 @@ describe('Selection strategies test suite', () => {
       promises.push(pool.execute())
     }
     await Promise.all(promises)
+    // expect(
+    //   pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
+    //     .workerChoiceStrategy.workersTaskRunTime.size
+    // ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
@@ -509,12 +618,7 @@ describe('Selection strategies test suite', () => {
       './tests/worker-files/thread/testWorker.js'
     )
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .previousWorkerIndex
-    ).toBeUndefined()
-    expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .currentWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().currentWorkerId
     ).toBeUndefined()
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
@@ -526,24 +630,19 @@ describe('Selection strategies test suite', () => {
     ).toBeUndefined()
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .previousWorkerIndex
-    ).toBe(0)
-    expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .currentWorkerIndex
+      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy().currentWorkerId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
         .defaultWorkerWeight
     ).toBeGreaterThan(0)
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workersTaskRunTime.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workersTaskRunTime.get(worker).runTime
+          .workersTaskRunTime.get(workerKey).runTime
       ).toBe(0)
     }
     await pool.destroy()
@@ -554,11 +653,7 @@ describe('Selection strategies test suite', () => {
     )
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.previousWorkerIndex
-    ).toBeUndefined()
-    expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.currentWorkerIndex
+        .workerChoiceStrategy.currentWorkerId
     ).toBeUndefined()
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
@@ -571,23 +666,19 @@ describe('Selection strategies test suite', () => {
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.previousWorkerIndex
-    ).toBe(0)
-    expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .workerChoiceStrategy.currentWorkerIndex
+        .workerChoiceStrategy.currentWorkerId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
         .workerChoiceStrategy.defaultWorkerWeight
     ).toBeGreaterThan(0)
-    for (const worker of pool.workerChoiceStrategyContext
+    for (const workerKey of pool.workerChoiceStrategyContext
       .getWorkerChoiceStrategy()
       .workerChoiceStrategy.workersTaskRunTime.keys()) {
       expect(
         pool.workerChoiceStrategyContext
           .getWorkerChoiceStrategy()
-          .workerChoiceStrategy.workersTaskRunTime.get(worker).runTime
+          .workerChoiceStrategy.workersTaskRunTime.get(workerKey).runTime
       ).toBe(0)
     }
     // We need to clean up the resources after our test