fix: test for worker file existence

[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 b2aa4a0b69fbd4e006ce6f53fecb90295edb535d..6671b57781b1f51c15bdf0717f3c96cafcf0ca76 100644 (file)
--- a/tests/pools/selection-strategies/selection-strategies.test.js
+++ b/tests/pools/selection-strategies/selection-strategies.test.js
@@ -1,9 +1,9 @@
 const { expect } = require('expect')
 const {
-  WorkerChoiceStrategies,
   DynamicThreadPool,
+  FixedClusterPool,
   FixedThreadPool,
-  FixedClusterPool
+  WorkerChoiceStrategies
 } = require('../../../lib')
 const { CircularArray } = require('../../../lib/circular-array')
 
@@ -79,7 +79,7 @@ describe('Selection strategies test suite', () => {
         expect(
           pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
             workerChoiceStrategy
-          ).nextWorkerNodeId
+          ).nextWorkerNodeKey
         ).toBe(0)
       } else if (workerChoiceStrategy === WorkerChoiceStrategies.FAIR_SHARE) {
         expect(
@@ -98,7 +98,7 @@ describe('Selection strategies test suite', () => {
         expect(
           pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
             workerChoiceStrategy
-          ).nextWorkerNodeId
+          ).nextWorkerNodeKey
         ).toBe(0)
         expect(
           pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -218,38 +218,25 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         WorkerChoiceStrategies.ROUND_ROBIN
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -279,38 +266,25 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         WorkerChoiceStrategies.ROUND_ROBIN
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -352,13 +326,13 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     pool.setWorkerChoiceStrategy(workerChoiceStrategy)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     await pool.destroy()
     pool = new DynamicThreadPool(
@@ -370,13 +344,13 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     pool.setWorkerChoiceStrategy(workerChoiceStrategy)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -485,31 +459,18 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
@@ -545,31 +506,18 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
@@ -675,7 +623,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -684,39 +632,34 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: expect.any(Number),
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: expect.any(Number),
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.waitTime.aggregate).toBeGreaterThanOrEqual(0)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.waitTime.aggregate == null) {
+        expect(workerNode.usage.waitTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.waitTime.aggregate).toBeGreaterThan(0)
+      }
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -737,7 +680,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -746,39 +689,34 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: expect.any(Number),
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: expect.any(Number),
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.waitTime.aggregate).toBeGreaterThanOrEqual(0)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.waitTime.aggregate == null) {
+        expect(workerNode.usage.waitTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.waitTime.aggregate).toBeGreaterThan(0)
+      }
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -878,7 +816,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -887,39 +825,30 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         elu: {
-          idle: {
-            aggregate: 0,
-            average: 0,
-            median: 0,
+          idle: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          active: {
-            aggregate: expect.any(Number),
-            average: 0,
-            median: 0,
+          }),
+          active: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          utilization: expect.any(Number)
+          })
         }
       })
       expect(workerNode.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      if (workerNode.usage.elu.utilization == null) {
+        expect(workerNode.usage.elu.utilization).toBeUndefined()
+      } else {
+        expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
+        expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      }
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -940,7 +869,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -949,39 +878,30 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         elu: {
-          idle: {
-            aggregate: 0,
-            average: 0,
-            median: 0,
+          idle: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          active: {
-            aggregate: expect.any(Number),
-            average: 0,
-            median: 0,
+          }),
+          active: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          utilization: expect.any(Number)
+          })
         }
       })
       expect(workerNode.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      if (workerNode.usage.elu.utilization == null) {
+        expect(workerNode.usage.elu.utilization).toBeUndefined()
+      } else {
+        expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
+        expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      }
     }
     // We need to clean up the resources after our test
     await pool.destroy()
@@ -1081,7 +1001,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -1089,42 +1009,41 @@ describe('Selection strategies test suite', () => {
           maxQueued: 0,
           failed: 0
         },
-        runTime: {
-          aggregate: expect.any(Number),
-          average: expect.any(Number),
-          median: 0,
+        runTime: expect.objectContaining({
           history: expect.any(CircularArray)
-        },
+        }),
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         elu: {
-          idle: {
-            aggregate: 0,
-            average: 0,
-            median: 0,
+          idle: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          active: {
-            aggregate: expect.any(Number),
-            average: expect.any(Number),
-            median: 0,
+          }),
+          active: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          utilization: expect.any(Number)
+          })
         }
       })
       expect(workerNode.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.runTime.average).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.runTime.average == null) {
+        expect(workerNode.usage.runTime.average).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.average).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.elu.utilization == null) {
+        expect(workerNode.usage.elu.utilization).toBeUndefined()
+      } else {
+        expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
+        expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      }
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1150,7 +1069,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -1158,42 +1077,41 @@ describe('Selection strategies test suite', () => {
           maxQueued: 0,
           failed: 0
         },
-        runTime: {
-          aggregate: expect.any(Number),
-          average: expect.any(Number),
-          median: 0,
+        runTime: expect.objectContaining({
           history: expect.any(CircularArray)
-        },
+        }),
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         elu: {
-          idle: {
-            aggregate: 0,
-            average: 0,
-            median: 0,
+          idle: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          active: {
-            aggregate: expect.any(Number),
-            average: expect.any(Number),
-            median: 0,
+          }),
+          active: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          utilization: expect.any(Number)
+          })
         }
       })
       expect(workerNode.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.runTime.average).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.runTime.average == null) {
+        expect(workerNode.usage.runTime.average).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.average).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.elu.utilization == null) {
+        expect(workerNode.usage.elu.utilization).toBeUndefined()
+      } else {
+        expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
+        expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      }
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1224,7 +1142,7 @@ describe('Selection strategies test suite', () => {
     }
     await Promise.all(promises)
     for (const workerNode of pool.workerNodes) {
-      expect(workerNode.usage).toStrictEqual({
+      expect(workerNode.usage).toMatchObject({
         tasks: {
           executed: expect.any(Number),
           executing: 0,
@@ -1232,42 +1150,41 @@ describe('Selection strategies test suite', () => {
           maxQueued: 0,
           failed: 0
         },
-        runTime: {
-          aggregate: expect.any(Number),
-          average: 0,
-          median: expect.any(Number),
+        runTime: expect.objectContaining({
           history: expect.any(CircularArray)
-        },
+        }),
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         elu: {
-          idle: {
-            aggregate: 0,
-            average: 0,
-            median: 0,
+          idle: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          active: {
-            aggregate: expect.any(Number),
-            average: expect.any(Number),
-            median: 0,
+          }),
+          active: expect.objectContaining({
             history: expect.any(CircularArray)
-          },
-          utilization: expect.any(Number)
+          })
         }
       })
       expect(workerNode.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.runTime.median).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.runTime.median == null) {
+        expect(workerNode.usage.runTime.median).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.median).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.elu.utilization == null) {
+        expect(workerNode.usage.elu.utilization).toBeUndefined()
+      } else {
+        expect(workerNode.usage.elu.utilization).toBeGreaterThanOrEqual(0)
+        expect(workerNode.usage.elu.utilization).toBeLessThanOrEqual(1)
+      }
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1454,40 +1371,35 @@ describe('Selection strategies test suite', () => {
           maxQueued: 0,
           failed: 0
         },
-        runTime: {
-          aggregate: expect.any(Number),
-          average: expect.any(Number),
-          median: 0,
+        runTime: expect.objectContaining({
           history: expect.any(CircularArray)
-        },
+        }),
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
       expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(
         max * maxMultiplier
       )
-      expect(workerNode.usage.runTime.aggregate).toBeGreaterThanOrEqual(0)
-      expect(workerNode.usage.runTime.average).toBeGreaterThanOrEqual(0)
+      if (workerNode.usage.runTime.aggregate == null) {
+        expect(workerNode.usage.runTime.aggregate).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.aggregate).toBeGreaterThan(0)
+      }
+      if (workerNode.usage.runTime.average == null) {
+        expect(workerNode.usage.runTime.average).toBeUndefined()
+      } else {
+        expect(workerNode.usage.runTime.average).toBeGreaterThan(0)
+      }
     }
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1528,30 +1440,21 @@ describe('Selection strategies test suite', () => {
         },
         runTime: {
           aggregate: expect.any(Number),
+          maximum: expect.any(Number),
+          minimum: expect.any(Number),
           average: expect.any(Number),
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
@@ -1605,30 +1508,21 @@ describe('Selection strategies test suite', () => {
         },
         runTime: {
           aggregate: expect.any(Number),
-          average: 0,
+          maximum: expect.any(Number),
+          minimum: expect.any(Number),
           median: expect.any(Number),
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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.usage.tasks.executed).toBeGreaterThanOrEqual(0)
@@ -1661,7 +1555,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1677,7 +1571,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1698,7 +1592,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1714,7 +1608,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1838,31 +1732,18 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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
+          }
         }
       })
     }
@@ -1879,7 +1760,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1921,31 +1802,18 @@ describe('Selection strategies test suite', () => {
           failed: 0
         },
         runTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         waitTime: {
-          aggregate: 0,
-          average: 0,
-          median: 0,
           history: expect.any(CircularArray)
         },
         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
+          }
         }
       })
     }
@@ -1962,7 +1830,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -1992,7 +1860,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -2013,7 +1881,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -2043,7 +1911,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBeDefined()
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
@@ -2059,7 +1927,7 @@ describe('Selection strategies test suite', () => {
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(
         pool.workerChoiceStrategyContext.workerChoiceStrategy
-      ).nextWorkerNodeId
+      ).nextWorkerNodeKey
     ).toBe(0)
     expect(
       pool.workerChoiceStrategyContext.workerChoiceStrategies.get(