feat: cache in a map worker choice strategy to allow conditionnal reuse

[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 39895b213ff6baf1e88167827ac8cb0f717002b1..254f02de7870e5c8da73ab6c260fa954a176283c 100644 (file)
--- a/tests/pools/selection-strategies/selection-strategies.test.js
+++ b/tests/pools/selection-strategies/selection-strategies.test.js
@@ -2,13 +2,18 @@ const { expect } = require('expect')
 const {
   WorkerChoiceStrategies,
   DynamicThreadPool,
-  FixedThreadPool
+  FixedThreadPool,
+  FixedClusterPool
 } = require('../../../lib/index')
 
 describe('Selection strategies test suite', () => {
+  const min = 0
+  const max = 3
+
   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'
@@ -16,8 +21,6 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify ROUND_ROBIN strategy is the default at pool creation', async () => {
-    const min = 0
-    const max = 3
     const pool = new DynamicThreadPool(
       min,
       max,
@@ -30,9 +33,25 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
+  it('Verify ROUND_ROBIN strategy is taken at pool creation', async () => {
+    const pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.ROUND_ROBIN }
+    )
+    expect(pool.opts.workerChoiceStrategy).toBe(
+      WorkerChoiceStrategies.ROUND_ROBIN
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.ROUND_ROBIN
+      ).nextWorkerId
+    ).toBe(0)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
   it('Verify ROUND_ROBIN strategy can be set after pool creation', async () => {
-    const min = 0
-    const max = 3
     const pool = new DynamicThreadPool(
       min,
       max,
@@ -47,17 +66,18 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify ROUND_ROBIN strategy default tasks usage statistics requirements', async () => {
-    const min = 0
-    const max = 3
     let pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(false)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(false)
+    await pool.destroy()
     pool = new DynamicThreadPool(
       min,
       max,
@@ -65,15 +85,16 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(false)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(false)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify ROUND_ROBIN strategy can be run in a fixed pool', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
@@ -85,7 +106,7 @@ describe('Selection strategies test suite', () => {
     // TODO: Create a better test to cover `RoundRobinWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
     // We need to clean up the resources after our test
@@ -93,8 +114,6 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify ROUND_ROBIN strategy can be run in a dynamic pool', async () => {
-    const min = 0
-    const max = 3
     const pool = new DynamicThreadPool(
       min,
       max,
@@ -107,97 +126,242 @@ describe('Selection strategies test suite', () => {
     // TODO: Create a better test to cover `RoundRobinWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
+    }
+    await Promise.all(promises)
+    // We need to clean up the resources after our test
+    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,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN }
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.ROUND_ROBIN
+      )?.nextWorkerId
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.ROUND_ROBIN
+      ).nextWorkerId
+    ).toBe(0)
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy: WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN }
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.ROUND_ROBIN
+      )?.nextWorkerId
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.ROUND_ROBIN
+      ).nextWorkerId
+    ).toBe(0)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  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_USED }
+    )
+    expect(pool.opts.workerChoiceStrategy).toBe(
+      WorkerChoiceStrategies.LESS_USED
+    )
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  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_USED)
+    expect(pool.opts.workerChoiceStrategy).toBe(
+      WorkerChoiceStrategies.LESS_USED
+    )
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  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_USED)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(false)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
+    ).toBe(false)
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_USED)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(false)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
+    ).toBe(false)
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  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_USED }
+    )
+    // 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_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_USED }
+    )
+    // 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_RECENTLY_USED strategy is taken at pool creation', async () => {
-    const max = 3
+  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_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
     )
     expect(pool.opts.workerChoiceStrategy).toBe(
-      WorkerChoiceStrategies.LESS_RECENTLY_USED
+      WorkerChoiceStrategies.LESS_BUSY
     )
     // 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 () => {
-    const max = 3
+  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_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
     expect(pool.opts.workerChoiceStrategy).toBe(
-      WorkerChoiceStrategies.LESS_RECENTLY_USED
+      WorkerChoiceStrategies.LESS_BUSY
     )
     // 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 () => {
-    const min = 0
-    const max = 3
+  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_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(false)
+    await pool.destroy()
     pool = new DynamicThreadPool(
       min,
       max,
       './tests/worker-files/thread/testWorker.js'
     )
-    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED)
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_BUSY)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).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 () => {
-    const max = 3
+  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_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
     )
-    // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose`
+    // TODO: Create a better test to cover `LessBusyWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LESS_RECENTLY_USED strategy can be run in a dynamic pool', async () => {
-    const min = 0
-    const max = 3
+  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_RECENTLY_USED }
+      { workerChoiceStrategy: WorkerChoiceStrategies.LESS_BUSY }
     )
-    // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose`
+    // TODO: Create a better test to cover `LessBusyWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
     // We need to clean up the resources after our test
@@ -205,7 +369,6 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify FAIR_SHARE strategy is taken at pool creation', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
@@ -214,12 +377,25 @@ describe('Selection strategies test suite', () => {
     expect(pool.opts.workerChoiceStrategy).toBe(
       WorkerChoiceStrategies.FAIR_SHARE
     )
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.FAIR_SHARE)
+      .workerLastVirtualTaskTimestamp.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).start
+      ).toBe(0)
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).end
+      ).toBe(0)
+    }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify FAIR_SHARE strategy can be set after pool creation', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
@@ -233,17 +409,18 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify FAIR_SHARE strategy default tasks usage statistics requirements', async () => {
-    const min = 0
-    const max = 3
     let pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(true)
+    await pool.destroy()
     pool = new DynamicThreadPool(
       min,
       max,
@@ -251,15 +428,16 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(true)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify FAIR_SHARE strategy can be run in a fixed pool', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
@@ -268,16 +446,19 @@ describe('Selection strategies test suite', () => {
     // TODO: Create a better test to cover `FairShareChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.FAIR_SHARE
+      ).workerLastVirtualTaskTimestamp.size
+    ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify FAIR_SHARE strategy can be run in a dynamic pool', async () => {
-    const min = 0
-    const max = 3
     const pool = new DynamicThreadPool(
       min,
       max,
@@ -286,16 +467,78 @@ describe('Selection strategies test suite', () => {
     )
     // TODO: Create a better test to cover `FairShareChoiceStrategy#choose`
     const promises = []
-    for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+    const maxMultiplier = 2
+    for (let i = 0; i < max * maxMultiplier; i++) {
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
+    // if (process.platform !== 'win32') {
+    //   expect(
+    //     pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+    //       WorkerChoiceStrategies.FAIR_SHARE
+    //     ).workerLastVirtualTaskTimestamp.size
+    //   ).toBe(pool.workers.length)
+    // }
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify FAIR_SHARE strategy internals are resets after setting it', async () => {
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.FAIR_SHARE
+      )?.workerLastVirtualTaskTimestamp
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.FAIR_SHARE)
+      .workerLastVirtualTaskTimestamp.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).start
+      ).toBe(0)
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).end
+      ).toBe(0)
+    }
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.FAIR_SHARE
+      )?.workerLastVirtualTaskTimestamp
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.FAIR_SHARE)
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.FAIR_SHARE)
+      .workerLastVirtualTaskTimestamp.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).start
+      ).toBe(0)
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.FAIR_SHARE)
+          .workerLastVirtualTaskTimestamp.get(workerKey).end
+      ).toBe(0)
+    }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify WEIGHTED_ROUND_ROBIN strategy is taken at pool creation', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
@@ -304,12 +547,35 @@ describe('Selection strategies test suite', () => {
     expect(pool.opts.workerChoiceStrategy).toBe(
       WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
     )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).currentWorkerId
+    ).toBe(0)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).defaultWorkerWeight
+    ).toBeGreaterThan(0)
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+      .workersTaskRunTime.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+          .workersTaskRunTime.get(workerKey).weight
+      ).toBeGreaterThan(0)
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+          .workersTaskRunTime.get(workerKey).runTime
+      ).toBe(0)
+    }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify WEIGHTED_ROUND_ROBIN strategy can be set after pool creation', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
@@ -323,17 +589,18 @@ describe('Selection strategies test suite', () => {
   })
 
   it('Verify WEIGHTED_ROUND_ROBIN strategy default tasks usage statistics requirements', async () => {
-    const min = 0
-    const max = 3
     let pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js'
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(true)
+    await pool.destroy()
     pool = new DynamicThreadPool(
       min,
       max,
@@ -341,15 +608,16 @@ describe('Selection strategies test suite', () => {
     )
     pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
     expect(
-      pool.workerChoiceStrategyContext.getWorkerChoiceStrategy()
-        .requiredStatistics.runTime
+      pool.workerChoiceStrategyContext.getRequiredStatistics().runTime
+    ).toBe(true)
+    expect(
+      pool.workerChoiceStrategyContext.getRequiredStatistics().avgRunTime
     ).toBe(true)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify WEIGHTED_ROUND_ROBIN strategy can be run in a fixed pool', async () => {
-    const max = 3
     const pool = new FixedThreadPool(
       max,
       './tests/worker-files/thread/testWorker.js',
@@ -358,16 +626,19 @@ describe('Selection strategies test suite', () => {
     // TODO: Create a better test to cover `WeightedRoundRobinWorkerChoiceStrategy#choose`
     const promises = []
     for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).workersTaskRunTime.size
+    ).toBe(pool.workers.length)
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify WEIGHTED_ROUND_ROBIN strategy can be run in a dynamic pool', async () => {
-    const min = 0
-    const max = 3
     const pool = new DynamicThreadPool(
       min,
       max,
@@ -376,17 +647,111 @@ describe('Selection strategies test suite', () => {
     )
     // TODO: Create a better test to cover `WeightedRoundRobinWorkerChoiceStrategy#choose`
     const promises = []
-    for (let i = 0; i < max * 2; i++) {
-      promises.push(pool.execute({ test: 'test' }))
+    const maxMultiplier =
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).defaultWorkerWeight * 2
+    for (let i = 0; i < max * maxMultiplier; i++) {
+      promises.push(pool.execute())
     }
     await Promise.all(promises)
+    if (process.platform !== 'win32') {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+          WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+        ).workersTaskRunTime.size
+      ).toBe(pool.workers.length)
+    }
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify WEIGHTED_ROUND_ROBIN strategy internals are resets after setting it', async () => {
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.currentWorkerId
+    ).toBeUndefined()
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.defaultWorkerWeight
+    ).toBeUndefined()
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.workersTaskRunTime
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).currentWorkerId
+    ).toBe(0)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).defaultWorkerWeight
+    ).toBeGreaterThan(0)
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+      .workersTaskRunTime.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+          .workersTaskRunTime.get(workerKey).runTime
+      ).toBe(0)
+    }
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js'
+    )
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.currentWorkerId
+    ).toBeUndefined()
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.defaultWorkerWeight
+    ).toBeUndefined()
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      )?.workersTaskRunTime
+    ).toBeUndefined()
+    pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).currentWorkerId
+    ).toBe(0)
+    expect(
+      pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+      ).defaultWorkerWeight
+    ).toBeGreaterThan(0)
+    for (const workerKey of pool.workerChoiceStrategyContext.workerChoiceStrategies
+      .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+      .workersTaskRunTime.keys()) {
+      expect(
+        pool.workerChoiceStrategyContext.workerChoiceStrategies
+          .get(WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN)
+          .workersTaskRunTime.get(workerKey).runTime
+      ).toBe(0)
+    }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
   it('Verify unknown strategies throw error', () => {
-    const min = 1
-    const max = 3
     expect(
       () =>
         new DynamicThreadPool(