diff --git a/src/services/consumption.service.spec.ts b/src/services/consumption.service.spec.ts
index 3220ebd0943ac24b8c0f328e01daa958bedb8fee..6d57b2bc94d606bf9db975131d354ea09210d3e0 100644
--- a/src/services/consumption.service.spec.ts
+++ b/src/services/consumption.service.spec.ts
@@ -3,7 +3,7 @@ import mockClient from './__mocks__/client'
 import { TimeStep } from 'enum/timeStep.enum'
 import { DateTime } from 'luxon'
 import { FluidType } from 'enum/fluid.enum'
-import { Dataload } from 'models'
+import { Dataload, TimePeriod } from 'models'
 
 const mockFetchFluidData = jest.fn()
 const mockFetchFluidMaxData = jest.fn()
@@ -23,15 +23,15 @@ jest.mock('./queryRunner.service', () => {
 describe('Consuption service', () => {
   const consumptionDataManager = new ConsumptionDataManager(mockClient)
   let fluidTypes: FluidType[] = [0]
-  const mockTimePeriod = {
+  const mockTimePeriod: TimePeriod = {
     startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
     endDate: DateTime.fromISO('2020-10-03T23:59:59.999'),
   }
-  const mockTimePeriodComparison = {
+  const mockTimePeriodComparison: TimePeriod = {
     startDate: DateTime.fromISO('2020-09-01T00:00:00.000'),
     endDate: DateTime.fromISO('2020-09-03T23:59:59.999'),
   }
-  const mockFetchDataActual = [
+  const mockFetchDataActual: Dataload[] = [
     {
       date: DateTime.fromMillis(1601503200000),
       value: 291.9,
@@ -41,7 +41,7 @@ describe('Consuption service', () => {
       value: 260.15,
     },
   ]
-  const mockFetchDataComparison = [
+  const mockFetchDataComparison: Dataload[] = [
     {
       date: DateTime.fromMillis(1598911200000),
       value: 228.23,
@@ -100,6 +100,7 @@ describe('Consuption service', () => {
       )
       expect(result).toEqual(mockResult)
     })
+
     it('should return a mapped data for multiple fluid', async () => {
       fluidTypes = [0, 1, 2]
       for (let i = 0; i < fluidTypes.length; i++) {
@@ -160,7 +161,37 @@ describe('Consuption service', () => {
       )
       expect(result).toEqual(mockResult)
     })
-
+    it('should return a mapped data for one fluid without comparison date', async () => {
+      const mockResult = {
+        actualData: [
+          {
+            date: DateTime.fromISO('2020-10-01T00:00:00.000+02:00'),
+            value: 45.127739999999996,
+            valueDetail: [45.127739999999996],
+          },
+          {
+            date: DateTime.fromISO('2020-10-02T00:00:00.000+02:00'),
+            value: 40.21918999999999,
+            valueDetail: [40.21918999999999],
+          },
+          {
+            date: DateTime.fromISO('2020-10-03T00:00:00.000+02:00'),
+            value: 0,
+            valueDetail: [-1],
+          },
+        ],
+        comparisonData: [],
+      }
+      for (let i = 0; i < fluidTypes.length; i++) {
+        mockFetchFluidData.mockResolvedValueOnce(mockFetchDataActual)
+      }
+      const result = await consumptionDataManager.getGraphData(
+        mockTimePeriod,
+        TimeStep.DAY,
+        fluidTypes
+      )
+      expect(result).toEqual(mockResult)
+    })
     it('should return null because of wrong parameters', async () => {
       const mockFluidTypes = [1]
       const result = await consumptionDataManager.getGraphData(
diff --git a/src/services/consumption.service.ts b/src/services/consumption.service.ts
index 3df43ab97181977e4188ddc218d08f3e71246041..22f3c7337969e23a78c668ef6bead16ece083a90 100644
--- a/src/services/consumption.service.ts
+++ b/src/services/consumption.service.ts
@@ -92,7 +92,6 @@ export default class ConsumptionDataManager {
           chartFluid: fluidType,
         })
       }
-
       const aggregatedData = this.aggregateGraphData(toBeAgreggatedData)
 
       // mapping result to contract
@@ -100,8 +99,6 @@ export default class ConsumptionDataManager {
 
       return mappedData
     } else return null
-
-    return mappedData
   }
 
   public async getMaxLoad(
@@ -152,6 +149,7 @@ export default class ConsumptionDataManager {
         [fluideType],
         compareTimePeriod
       )
+
       if (graphData) {
         const performanceIndicator: PerformanceIndicator = {
           value: null,
@@ -368,7 +366,7 @@ export default class ConsumptionDataManager {
           singleFluidCharts[0].chartData.comparisonData.length,
           singleFluidCharts[0].chartData.actualData.length
         )
-      } else zlength = singleFluidCharts[0].chartData.actualData.length
+      } else length = singleFluidCharts[0].chartData.actualData.length
 
       for (let i = 0; i < length; i++) {
         //const agreggatedDate=  singleFluidCharts[0].chartData.actualData[i].;
diff --git a/src/services/consumptionFormatter.service.spec.ts b/src/services/consumptionFormatter.service.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..ff053cef2c3e7e8d56d781a9c66bd6afeb128e72
--- /dev/null
+++ b/src/services/consumptionFormatter.service.spec.ts
@@ -0,0 +1,167 @@
+import ConsumptionFormatterService from './consumptionFormatter.service'
+import { TimeStep } from 'enum/timeStep.enum'
+import { DateTime } from 'luxon'
+import { Dataload, TimePeriod } from 'models'
+
+const mockDataLoad: Dataload[] = [
+  {
+    date: DateTime.fromISO('2020-10-01T00:00:00.000'),
+    value: 291.9,
+  },
+  {
+    date: DateTime.fromISO('2020-10-01T00:30:00.000'),
+    value: 235.5,
+  },
+  {
+    date: DateTime.fromISO('2020-10-03T18:59:59.999'),
+    value: 260.15,
+  },
+  {
+    date: DateTime.fromISO('2020-10-03T20:59:59.999'),
+    value: 293.33,
+  },
+  {
+    date: DateTime.fromISO('2020-11-03T20:59:59.999'),
+    value: 268.55,
+  },
+  {
+    date: DateTime.fromISO('2018-11-03T20:59:59.999'),
+    value: 272.33,
+  },
+]
+let mockTimePeriod: TimePeriod = {
+  startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+  endDate: DateTime.fromISO('2020-10-03T23:59:59.999'),
+}
+const unknowTimeStep = 999
+describe('ConsumptionFormatter service', () => {
+  const consumptionFormatterService = new ConsumptionFormatterService()
+  describe('formatGraphData method', () => {
+    it('shoud return a formattedData for DAY', async () => {
+      const mockResult = [
+        {
+          date: DateTime.fromISO('2020-10-01T00:00:00.000+02:00'),
+          value: 291.9,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-10-02T00:00:00.000+02:00'),
+          value: -1,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-10-03T18:59:59.999+02:00'),
+          value: 260.15,
+          valueDetail: null,
+        },
+      ]
+      const result = await consumptionFormatterService.formatGraphData(
+        mockDataLoad,
+        mockTimePeriod,
+        TimeStep.DAY
+      )
+      expect(result).toEqual(mockResult)
+    })
+    it('shoud return a formattedData for HALF_AN_HOUR', async () => {
+      mockTimePeriod = {
+        startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-10-01T01:00:00.000'),
+      }
+
+      const mockResult = [
+        {
+          date: DateTime.fromISO('2020-10-01T00:00:00.000+02:00'),
+          value: 291.9,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-10-01T00:30:00.000+02:00'),
+          value: 235.5,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-10-01T01:00:00.000+02:00'),
+          value: -1,
+          valueDetail: null,
+        },
+      ]
+      const result = await consumptionFormatterService.formatGraphData(
+        mockDataLoad,
+        mockTimePeriod,
+        TimeStep.HALF_AN_HOUR
+      )
+      expect(result).toEqual(mockResult)
+    })
+    it('shoud return a formattedData for MONTH', async () => {
+      mockTimePeriod = {
+        startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-12-01T00:00:00.000'),
+      }
+
+      const mockResult = [
+        {
+          date: DateTime.fromISO('2020-10-01T00:00:00.000+02:00'),
+          value: 291.9,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-11-03T20:59:59.999+01:00'),
+          value: 268.55,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-12-01T01:00:00.000+02:00'),
+          value: -1,
+          valueDetail: null,
+        },
+      ]
+      const result = await consumptionFormatterService.formatGraphData(
+        mockDataLoad,
+        mockTimePeriod,
+        TimeStep.MONTH
+      )
+      expect(result).toEqual(mockResult)
+    })
+    it('shoud return a formattedData for YEAR', async () => {
+      mockTimePeriod = {
+        startDate: DateTime.fromISO('2018-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-12-01T00:00:00.000'),
+      }
+
+      const mockResult = [
+        {
+          date: DateTime.fromISO('2018-11-03T20:59:59.999+01:00'),
+          value: 272.33,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2019-10-01T00:00:00.000+02:00'),
+          value: -1,
+          valueDetail: null,
+        },
+        {
+          date: DateTime.fromISO('2020-10-01T00:00:00.000+02:00'),
+          value: 291.9,
+          valueDetail: null,
+        },
+      ]
+      const result = await consumptionFormatterService.formatGraphData(
+        mockDataLoad,
+        mockTimePeriod,
+        TimeStep.YEAR
+      )
+      expect(result).toEqual(mockResult)
+    })
+    it('shoud return an error because of unknown TimeStep', async () => {
+      try {
+        await consumptionFormatterService.formatGraphData(
+          mockDataLoad,
+          mockTimePeriod,
+          unknowTimeStep
+        )
+      } catch (error) {
+        expect(error).toEqual(new Error('TimeStep unknown'))
+      }
+    })
+  })
+})
diff --git a/src/services/consumptionFormatter.service.ts b/src/services/consumptionFormatter.service.ts
index f810dee905ea8598107db154f0abcf62d0b7d0a9..41e8faf6aff47b3b9130bd9c17e949fac572e93d 100644
--- a/src/services/consumptionFormatter.service.ts
+++ b/src/services/consumptionFormatter.service.ts
@@ -33,7 +33,6 @@ export default class ConsumptionFormatterService {
       const filtereddata = data.filter(dt =>
         dateChartService.compareStepDate(timeStep, dt.date, parsingDate)
       )
-
       const newElement = filtereddata[0]
         ? filtereddata[0]
         : {
@@ -61,8 +60,8 @@ export default class ConsumptionFormatterService {
       case TimeStep.YEAR:
         return { years: 1 }
 
-      default:
-        return { minutes: 30 }
+      // default:
+      //   return { minutes: 30 }
     }
   }
 }
diff --git a/src/services/consumptionValidator.service.spec.ts b/src/services/consumptionValidator.service.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..40b8216a1215d6298f73491c99c8af616a1fa836
--- /dev/null
+++ b/src/services/consumptionValidator.service.spec.ts
@@ -0,0 +1,150 @@
+import ConsumptionValidatorService from './consumptionValidator.service'
+import mockClient from './__mocks__/client'
+import { TimeStep } from 'enum/timeStep.enum'
+import { DateTime } from 'luxon'
+import { FluidType } from 'enum/fluid.enum'
+import { Dataload, TimePeriod } from 'models'
+
+const mockTimePeriod: TimePeriod = {
+  startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+  endDate: DateTime.fromISO('2020-10-03T23:59:59.999'),
+}
+const mockTimePeriodComparison: TimePeriod = {
+  startDate: DateTime.fromISO('2020-09-01T00:00:00.000'),
+  endDate: DateTime.fromISO('2020-09-03T23:59:59.999'),
+}
+let fluidTypes: FluidType[] = [0, 1, 2]
+describe('ConsumptionFormatter service', () => {
+  const consumptionValidatorService = new ConsumptionValidatorService()
+  describe('formatGraphData method', () => {
+    it('shoud return true for DAY', () => {
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.DAY,
+        fluidTypes
+      )
+      expect(result).toBeTruthy()
+    })
+    it('shoud return true with comparison Date', () => {
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.DAY,
+        fluidTypes,
+        mockTimePeriodComparison
+      )
+      expect(result).toBeTruthy()
+    })
+    it('shoud return false with comparison Date', () => {
+      const wrongTimePeriodComparison: TimePeriod = {
+        startDate: DateTime.fromISO('2020-09-05T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-09-03T23:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.DAY,
+        fluidTypes,
+        wrongTimePeriodComparison
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false with comparison Date', () => {
+      const wrongTimePeriodComparison: TimePeriod = {
+        startDate: DateTime.fromISO('2020-09-05T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-09-07T23:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.HALF_AN_HOUR,
+        [0],
+        wrongTimePeriodComparison
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of fluid', () => {
+      const wrongFluidType: FluidType[] = []
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.DAY,
+        wrongFluidType
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of wrong TimePeriod', () => {
+      const wrongTimePeriod: TimePeriod = {
+        startDate: DateTime.fromISO('2020-10-05T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-10-03T23:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        wrongTimePeriod,
+        TimeStep.DAY,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of HALF_AN_HOUR and ELECTRICITY', () => {
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.HALF_AN_HOUR,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of HOUR and GAS', () => {
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriod,
+        TimeStep.HOUR,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of HALF_AN_HOUR and ValidateTimePeriodLength', () => {
+      fluidTypes = [0] //Only fluid without TimeStep incompatibilty
+      const mockTimePeriodTooLong: TimePeriod = {
+        startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-10-02T22:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriodTooLong,
+        TimeStep.HALF_AN_HOUR,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of DAY and ValidateTimePeriodLength', () => {
+      const mockTimePeriodTooLong: TimePeriod = {
+        startDate: DateTime.fromISO('2020-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-12-01T22:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriodTooLong,
+        TimeStep.DAY,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of MONTH and ValidateTimePeriodLength', () => {
+      const mockTimePeriodTooLong: TimePeriod = {
+        startDate: DateTime.fromISO('2018-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-12-01T22:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriodTooLong,
+        TimeStep.MONTH,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+    it('shoud return false because of YEAR and ValidateTimePeriodLength', () => {
+      const mockTimePeriodTooLong: TimePeriod = {
+        startDate: DateTime.fromISO('2009-10-01T00:00:00.000'),
+        endDate: DateTime.fromISO('2020-12-01T22:59:59.999'),
+      }
+      const result = consumptionValidatorService.ValidateGetGraphData(
+        mockTimePeriodTooLong,
+        TimeStep.YEAR,
+        fluidTypes
+      )
+      expect(result).toBeFalsy()
+    })
+  })
+})
diff --git a/src/services/timePeriod.service.spec.ts b/src/services/timePeriod.service.spec.ts
index 0e3bd9d1094815c68daebe2fa0270731a46b74f7..60b75294b78a41baebc644a1109ced23918b0c91 100644
--- a/src/services/timePeriod.service.spec.ts
+++ b/src/services/timePeriod.service.spec.ts
@@ -11,22 +11,17 @@ describe('timePeriod service', () => {
   describe('getTimePeriods method', () => {
     const lastDatePeriod = DateTime.fromISO('2020-10-31T08:00:00.000')
     const fluidTypes: FluidType[] = [0, 1, 2]
-
-    it('should return the current timePeriod  and the comparison timePeriod for all timeStep', () => {
-      const comparisonTimePeriod: TimePeriod = {
-        startDate: DateTime.fromISO('2020-08-01T00:00:00.000').setLocale(
-          'fr-FR'
-        ),
-        endDate: DateTime.fromISO('2020-08-31T00:00:00.000').setLocale('fr-FR'),
-      }
-
-      const timePeriod: TimePeriod = {
-        startDate: DateTime.fromISO('2020-09-01T00:00:00.000').setLocale(
-          'fr-FR'
-        ),
-        endDate: DateTime.fromISO('2020-09-30T23:59:59.999').setLocale('fr-FR'),
-      }
-      let result = timePeriodService.getTimePeriods(
+    const comparisonTimePeriod: TimePeriod = {
+      startDate: DateTime.fromISO('2020-08-01T00:00:00.000').setLocale('fr-FR'),
+      endDate: DateTime.fromISO('2020-08-31T00:00:00.000').setLocale('fr-FR'),
+    }
+    const timePeriod: TimePeriod = {
+      startDate: DateTime.fromISO('2020-09-01T00:00:00.000').setLocale('fr-FR'),
+      endDate: DateTime.fromISO('2020-09-30T23:59:59.999').setLocale('fr-FR'),
+    }
+    let result = null
+    it('should return the current timePeriod  and the comparison timePeriod for DAY', () => {
+      result = timePeriodService.getTimePeriods(
         lastDatePeriod,
         fluidTypes,
         TimeStep.DAY
@@ -35,7 +30,8 @@ describe('timePeriod service', () => {
         timePeriod,
         comparisonTimePeriod,
       })
-
+    })
+    it('should return the current timePeriod  and the comparison timePeriod for MONTH', () => {
       comparisonTimePeriod.endDate = DateTime.fromISO(
         '2020-08-31T23:59:59.999'
       ).setLocale('')
@@ -58,7 +54,8 @@ describe('timePeriod service', () => {
         timePeriod,
         comparisonTimePeriod,
       })
-
+    })
+    it('should return the current timePeriod  and the comparison timePeriod for YEAR', () => {
       comparisonTimePeriod.endDate = DateTime.fromISO('2018-12-31T23:59:59.999')
       comparisonTimePeriod.startDate = DateTime.fromISO(
         '2018-01-01T00:00:00.000'
@@ -112,18 +109,19 @@ describe('timePeriod service', () => {
       startDate: DateTime.fromISO('2020-10-07T08:00:00.000+02:00'),
       endDate: DateTime.fromISO('2020-10-14T08:00:00.000+02:00'),
     }
-    it('should return the comparison TimePeriod', () => {
-      let expectedComparisonDateTime: TimePeriod = {
-        startDate: DateTime.fromISO('2020-10-06T08:00:00.000+02:00'),
-        endDate: DateTime.fromISO('2020-10-13T08:00:00.000+02:00'),
-      }
-
-      let result = timePeriodService.getComparisonTimePeriod(
+    let expectedComparisonDateTime: TimePeriod = {
+      startDate: DateTime.fromISO('2020-10-06T08:00:00.000+02:00'),
+      endDate: DateTime.fromISO('2020-10-13T08:00:00.000+02:00'),
+    }
+    let result = null
+    it('should return the comparison TimePeriod for HOUR', () => {
+      result = timePeriodService.getComparisonTimePeriod(
         timePeriod,
         TimeStep.HOUR
       )
       expect(result).toEqual(expectedComparisonDateTime)
-
+    })
+    it('should return the comparison TimePeriod for DAY', () => {
       expectedComparisonDateTime = {
         startDate: DateTime.fromISO('2020-10-01T00:00:00.000+02:00').setLocale(
           'fr-FR'
@@ -135,7 +133,8 @@ describe('timePeriod service', () => {
         TimeStep.DAY
       )
       expect(result).toEqual(expectedComparisonDateTime)
-
+    })
+    it('should return the comparison TimePeriod for MONTH', () => {
       expectedComparisonDateTime = {
         startDate: DateTime.fromISO('2020-09-07T00:00:00.000+02:00'),
         endDate: DateTime.fromISO('2020-09-30T23:59:59.999+02:00'),
@@ -145,7 +144,8 @@ describe('timePeriod service', () => {
         TimeStep.MONTH
       )
       expect(result).toEqual(expectedComparisonDateTime)
-
+    })
+    it('should return the comparison TimePeriod for YEAR', () => {
       expectedComparisonDateTime = {
         startDate: DateTime.fromISO('2019-10-07T00:00:00.000+02:00'),
         endDate: DateTime.fromISO('2019-12-31T23:59:59.999+01:00'),
@@ -155,7 +155,8 @@ describe('timePeriod service', () => {
         TimeStep.YEAR
       )
       expect(result).toEqual(expectedComparisonDateTime)
-
+    })
+    it('should return an error because of unknown TimeStep', () => {
       try {
         result = timePeriodService.getComparisonTimePeriod(
           timePeriod,
@@ -168,14 +169,16 @@ describe('timePeriod service', () => {
   })
 
   describe('getLastDayOfCompletePeriod method', () => {
-    it('should return the date of the last day of a completed period', () => {
-      let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
-      let result = timePeriodService.getLastDayOfCompletePeriod(
+    let result = null
+    let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
+    it('should return the date of the last day of a completed period for HOUR', () => {
+      result = timePeriodService.getLastDayOfCompletePeriod(
         randomDate,
         TimeStep.HOUR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of a completed period for DAY', () => {
       expectedDate = DateTime.fromISO(
         '2020-09-30T00:00:00.000+02:00'
       ).setLocale('fr-FR')
@@ -184,21 +187,24 @@ describe('timePeriod service', () => {
         TimeStep.DAY
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of a completed period for MONTH', () => {
       expectedDate = DateTime.fromISO('2020-09-30T00:00:00.000+02:00')
       result = timePeriodService.getLastDayOfCompletePeriod(
         randomDate,
         TimeStep.MONTH
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of a completed period for YEAR', () => {
       expectedDate = DateTime.fromISO('2019-12-31T00:00:00.000+01:00')
       result = timePeriodService.getLastDayOfCompletePeriod(
         randomDate,
         TimeStep.YEAR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return an error because of unknown TimeStep', () => {
       try {
         result = timePeriodService.getLastDayOfCompletePeriod(
           randomDate,
@@ -211,14 +217,16 @@ describe('timePeriod service', () => {
   })
 
   describe('getLastDayOfTimePeriod method', () => {
+    let result = null
+    let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
     it('should return the date of the last day of current period', () => {
-      let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
-      let result = timePeriodService.getLastDayOfTimePeriod(
+      result = timePeriodService.getLastDayOfTimePeriod(
         randomDate,
         TimeStep.HOUR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO(
         '2020-10-31T23:59:59.999+01:00'
       ).setLocale('fr-FR')
@@ -227,21 +235,24 @@ describe('timePeriod service', () => {
         TimeStep.DAY
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO('2020-10-31T00:00:00.000+01:00')
       result = timePeriodService.getLastDayOfTimePeriod(
         randomDate,
         TimeStep.MONTH
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO('2020-12-31T00:00:00.000+01:00')
       result = timePeriodService.getLastDayOfTimePeriod(
         randomDate,
         TimeStep.YEAR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       try {
         result = timePeriodService.getLastDayOfTimePeriod(
           randomDate,
@@ -254,14 +265,16 @@ describe('timePeriod service', () => {
   })
 
   describe('getStartDateFromEndDateByTimeStep method', () => {
+    let result = null
+    let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
     it('should return the date of the first day of a period', () => {
-      let expectedDate = DateTime.fromISO('2020-10-10T00:00:00.000+02:00')
-      let result = timePeriodService.getStartDateFromEndDateByTimeStep(
+      result = timePeriodService.getStartDateFromEndDateByTimeStep(
         randomDate,
         TimeStep.HOUR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO(
         '2020-10-01T00:00:00.000+02:00'
       ).setLocale('fr-FR')
@@ -270,21 +283,24 @@ describe('timePeriod service', () => {
         TimeStep.DAY
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO('2020-10-01T00:00:00.000+02:00')
       result = timePeriodService.getStartDateFromEndDateByTimeStep(
         randomDate,
         TimeStep.MONTH
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       expectedDate = DateTime.fromISO('2020-01-01T00:00:00.000+01:00')
       result = timePeriodService.getStartDateFromEndDateByTimeStep(
         randomDate,
         TimeStep.YEAR
       )
       expect(result).toEqual(expectedDate)
-
+    })
+    it('should return the date of the last day of current period', () => {
       try {
         result = timePeriodService.getStartDateFromEndDateByTimeStep(
           randomDate,