test: parameterise system time

Author: tstephen-nhs

packages/gsul/tests/testBuildResult.test.ts

@@ -7,12 +7,14 @@ type scenariosType = {
   inputPrescriptions: inputPrescriptionType
   queryResults: Array<itemType>
   expectedResult: outputPrescriptionType
+  currentTime: number
 }
 const now = new Date()
 const futureDateTime = new Date(now.valueOf() + (24 * 60 * 60 * 1000)).toISOString()
 const scenarios: Array<scenariosType> = [
   {
     scenarioDescription: "should return correct data when a matched prescription found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -40,6 +42,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return no items when empty item status are found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -53,6 +56,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return latest data when a multiple updates found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -86,6 +90,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return latest item for multiple updates for each of multiple statuses",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -137,6 +142,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should exclude item when post-dated update hasn't matured",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -158,6 +164,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should use latest post-dated update when multiple have matured",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -219,6 +226,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return an item when it _has_ matured even though the post-dated time is in the future",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -248,6 +256,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return no items when empty item status are found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -261,10 +270,9 @@ const scenarios: Array<scenariosType> = [
   }
 ]
 describe("Unit tests for buildResults", () => {
-  it.each<scenariosType>(scenarios)("$scenarioDescription", ({inputPrescriptions, queryResults, expectedResult}) => {
-    // Use a fixed time of 2000-01-01 for tests (946684800000 ms since epoch)
-    const fixedCurrentTime = new Date("2000-01-01T00:00:00Z").getTime()
-    const result = filterOutFutureReduceToLatestUpdates(inputPrescriptions, queryResults, fixedCurrentTime)
-    expect(result).toMatchObject(expectedResult)
-  })
+  it.each<scenariosType>(scenarios)("$scenarioDescription",
+    ({inputPrescriptions, queryResults, expectedResult, currentTime}) => {
+      const result = filterOutFutureReduceToLatestUpdates(inputPrescriptions, queryResults, currentTime)
+      expect(result).toMatchObject(expectedResult)
+    })
 })