chore: generate documentation

[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 dbe286b40e5a46f7b262a700f130f4aad1bf82c4..dd5a398fc9a0b101b5a6fe27c3a1c38accaa94b9 100644 (file)
--- a/tests/pools/selection-strategies/selection-strategies.test.js
+++ b/tests/pools/selection-strategies/selection-strategies.test.js
@@ -98,7 +98,7 @@ describe('Selection strategies test suite', () => {
         expect(
           pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
             workerChoiceStrategy
-          ).currentWorkerNodeId
+          ).nextWorkerNodeId
         ).toBe(0)
         expect(
           pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -115,7 +115,31 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
-  it('Verify ROUND_ROBIN strategy default tasks usage statistics requirements', async () => {
+  it('Verify ROUND_ROBIN strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify ROUND_ROBIN strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
     let pool = new FixedThreadPool(
       max,
@@ -135,7 +159,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -157,7 +185,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -182,6 +214,7 @@ describe('Selection strategies test suite', () => {
           executed: maxMultiplier,
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -196,7 +229,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
     }
     expect(
@@ -228,6 +275,7 @@ describe('Selection strategies test suite', () => {
           executed: maxMultiplier,
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -242,7 +290,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
     }
     expect(
@@ -320,7 +382,31 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
-  it('Verify LEAST_USED strategy default tasks usage statistics requirements', async () => {
+  it('Verify LEAST_USED strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_USED
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LEAST_USED strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_USED
     let pool = new FixedThreadPool(
       max,
@@ -340,7 +426,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -362,7 +452,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -384,9 +478,10 @@ describe('Selection strategies test suite', () => {
     for (const workerNode of pool.workerNodes) {
       expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
-          executed: maxMultiplier,
+          executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -401,8 +496,26 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
+        max * maxMultiplier
+      )
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -425,9 +538,10 @@ describe('Selection strategies test suite', () => {
     for (const workerNode of pool.workerNodes) {
       expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
-          executed: maxMultiplier,
+          executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -442,15 +556,56 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
+        max * maxMultiplier
+      )
     }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LEAST_BUSY strategy default tasks usage statistics requirements', async () => {
+  it('Verify LEAST_BUSY strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_BUSY
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LEAST_BUSY strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_BUSY
     let pool = new FixedThreadPool(
       max,
@@ -470,7 +625,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -492,7 +651,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -517,6 +680,7 @@ describe('Selection strategies test suite', () => {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -531,7 +695,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
       expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
@@ -566,6 +744,7 @@ describe('Selection strategies test suite', () => {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -580,20 +759,60 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
-      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThan(0)
-      expect(workerNode.workerUsage.waitTime.aggregate).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.waitTime.aggregate).toBeGreaterThanOrEqual(
+        0
+      )
     }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify LEAST_ELU strategy default tasks usage statistics requirements', async () => {
+  it('Verify LEAST_ELU strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_ELU
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify LEAST_ELU strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.LEAST_ELU
     let pool = new FixedThreadPool(
       max,
@@ -613,7 +832,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: true
+      elu: {
+        aggregate: true,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -635,7 +858,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: true
+      elu: {
+        aggregate: true,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -655,11 +882,12 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      const expectedWorkerUsage = {
+      expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -673,27 +901,29 @@ describe('Selection strategies test suite', () => {
           average: 0,
           median: 0,
           history: expect.any(CircularArray)
+        },
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: expect.any(Number),
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: expect.any(Number)
         }
-      }
-      if (workerNode.workerUsage.elu === undefined) {
-        expect(workerNode.workerUsage).toStrictEqual({
-          ...expectedWorkerUsage,
-          elu: undefined
-        })
-      } else {
-        expect(workerNode.workerUsage).toStrictEqual({
-          ...expectedWorkerUsage,
-          elu: {
-            active: expect.any(Number),
-            idle: 0,
-            utilization: 1
-          }
-        })
-      }
+      })
       expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
+      expect(workerNode.workerUsage.elu.utilization).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeLessThanOrEqual(1)
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -714,11 +944,12 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      const expectedWorkerUsage = {
+      expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -732,33 +963,59 @@ describe('Selection strategies test suite', () => {
           average: 0,
           median: 0,
           history: expect.any(CircularArray)
+        },
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: expect.any(Number),
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: expect.any(Number)
         }
-      }
-      if (workerNode.workerUsage.elu === undefined) {
-        expect(workerNode.workerUsage).toStrictEqual({
-          ...expectedWorkerUsage,
-          elu: undefined
-        })
-      } else {
-        expect(workerNode.workerUsage).toStrictEqual({
-          ...expectedWorkerUsage,
-          elu: {
-            active: expect.any(Number),
-            idle: 0,
-            utilization: 1
-          }
-        })
-      }
+      })
       expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
+      expect(workerNode.workerUsage.elu.utilization).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeLessThanOrEqual(1)
     }
     // We need to clean up the resources after our test
     await pool.destroy()
   })
 
-  it('Verify FAIR_SHARE strategy default tasks usage statistics requirements', async () => {
+  it('Verify FAIR_SHARE strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.FAIR_SHARE
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: false
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify FAIR_SHARE strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.FAIR_SHARE
     let pool = new FixedThreadPool(
       max,
@@ -778,7 +1035,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: true,
+        average: true,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -800,7 +1061,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: true,
+        average: true,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -822,9 +1087,10 @@ describe('Selection strategies test suite', () => {
     for (const workerNode of pool.workerNodes) {
       expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
-          executed: maxMultiplier,
+          executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -839,10 +1105,30 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: expect.any(Number),
+            average: expect.any(Number),
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: expect.any(Number)
+        }
       })
-      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThan(0)
-      expect(workerNode.workerUsage.runTime.average).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
+        max * maxMultiplier
+      )
+      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.runTime.average).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeLessThanOrEqual(1)
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -870,9 +1156,10 @@ describe('Selection strategies test suite', () => {
     for (const workerNode of pool.workerNodes) {
       expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
-          executed: maxMultiplier,
+          executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -887,10 +1174,30 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: expect.any(Number),
+            average: expect.any(Number),
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: expect.any(Number)
+        }
       })
-      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThan(0)
-      expect(workerNode.workerUsage.runTime.average).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
+        max * maxMultiplier
+      )
+      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.runTime.average).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeLessThanOrEqual(1)
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -923,9 +1230,10 @@ describe('Selection strategies test suite', () => {
     for (const workerNode of pool.workerNodes) {
       expect(workerNode.workerUsage).toStrictEqual({
         tasks: {
-          executed: maxMultiplier,
+          executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -940,10 +1248,30 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: expect.any(Number),
+            average: expect.any(Number),
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: expect.any(Number)
+        }
       })
-      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThan(0)
-      expect(workerNode.workerUsage.runTime.median).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
+        max * maxMultiplier
+      )
+      expect(workerNode.workerUsage.runTime.aggregate).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.runTime.median).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeGreaterThanOrEqual(0)
+      expect(workerNode.workerUsage.elu.utilization).toBeLessThanOrEqual(1)
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1028,7 +1356,31 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
-  it('Verify WEIGHTED_ROUND_ROBIN strategy default tasks usage statistics requirements', async () => {
+  it('Verify WEIGHTED_ROUND_ROBIN strategy default policy', async () => {
+    const workerChoiceStrategy = WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify WEIGHTED_ROUND_ROBIN strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy = WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN
     let pool = new FixedThreadPool(
       max,
@@ -1048,7 +1400,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -1070,7 +1426,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -1095,6 +1455,7 @@ describe('Selection strategies test suite', () => {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -1109,7 +1470,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
       expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
@@ -1152,6 +1527,7 @@ describe('Selection strategies test suite', () => {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -1166,9 +1542,23 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
-      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
@@ -1214,6 +1604,7 @@ describe('Selection strategies test suite', () => {
           executed: expect.any(Number),
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -1228,9 +1619,23 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
-      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThan(0)
+      expect(workerNode.workerUsage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.workerUsage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
@@ -1260,7 +1665,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1276,7 +1681,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1297,7 +1702,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1313,7 +1718,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1329,7 +1734,32 @@ describe('Selection strategies test suite', () => {
     await pool.destroy()
   })
 
-  it('Verify INTERLEAVED_WEIGHTED_ROUND_ROBIN strategy default tasks usage statistics requirements', async () => {
+  it('Verify INTERLEAVED_WEIGHTED_ROUND_ROBIN strategy default policy', async () => {
+    const workerChoiceStrategy =
+      WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN
+    let pool = new FixedThreadPool(
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    await pool.destroy()
+    pool = new DynamicThreadPool(
+      min,
+      max,
+      './tests/worker-files/thread/testWorker.js',
+      { workerChoiceStrategy }
+    )
+    expect(pool.workerChoiceStrategyContext.getStrategyPolicy()).toStrictEqual({
+      useDynamicWorker: true
+    })
+    // We need to clean up the resources after our test
+    await pool.destroy()
+  })
+
+  it('Verify INTERLEAVED_WEIGHTED_ROUND_ROBIN strategy default tasks statistics requirements', async () => {
     const workerChoiceStrategy =
       WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN
     let pool = new FixedThreadPool(
@@ -1350,7 +1780,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -1372,7 +1806,11 @@ describe('Selection strategies test suite', () => {
         average: false,
         median: false
       },
-      elu: false
+      elu: {
+        aggregate: false,
+        average: false,
+        median: false
+      }
     })
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -1400,6 +1838,7 @@ describe('Selection strategies test suite', () => {
           executed: maxMultiplier,
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -1414,7 +1853,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
     }
     expect(
@@ -1425,12 +1878,12 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentRoundId
+      ).roundId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1468,6 +1921,7 @@ describe('Selection strategies test suite', () => {
           executed: maxMultiplier,
           executing: 0,
           queued: 0,
+          maxQueued: 0,
           failed: 0
         },
         runTime: {
@@ -1482,7 +1936,21 @@ describe('Selection strategies test suite', () => {
           median: 0,
           history: expect.any(CircularArray)
         },
-        elu: undefined
+        elu: {
+          idle: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          active: {
+            aggregate: 0,
+            average: 0,
+            median: 0,
+            history: expect.any(CircularArray)
+          },
+          utilization: 0
+        }
       })
     }
     expect(
@@ -1493,12 +1961,12 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentRoundId
+      ).roundId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1523,12 +1991,12 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentRoundId
+      ).roundId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1544,12 +2012,12 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentRoundId
+      ).roundId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1574,12 +2042,12 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentRoundId
+      ).roundId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1595,7 +2063,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).currentWorkerNodeId
+      ).nextWorkerNodeId
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(