add timezone offset tests

examples/detox/e2e/tests/timezoneOffset.spec.js

@@ -0,0 +1,81 @@
+const {
+  setTimeZoneOffsetInMinutes,
+  expectDate,
+  scrollWheel,
+  expectDateString,
+  setMaximumDate,
+  setDate,
+} = require('../utils')
+
+const scrollMinuteWheel = () => scrollWheel(2, 1)
+
+// I haven't found a way to change the timezone on the emulator to be able to run these tests.
+// Until possible, run these tests locally when needed with Europe/Stockholm timezone.
+describe.skip('Timezone offset', () => {
+  before(async () => {
+    await device.reloadReactNative()
+    await element(by.text('Advanced')).tap()
+  })
+
+  it('undefined (default)', async () => {
+    await setTimeZoneOffsetInMinutes(undefined)
+    await scrollMinuteWheel()
+    await expectDate('2000-01-01 00:01:00')
+    await expectDateString('Sat Jan 11201 AM ')
+  })
+
+  it('0', async () => {
+    await setTimeZoneOffsetInMinutes(0)
+    await scrollMinuteWheel()
+    await expectDate('2000-01-01 00:01:00')
+    await expectDateString('Fri Dec 311101 PM ')
+  })
+
+  it('180', async () => {
+    await setTimeZoneOffsetInMinutes(180)
+    await scrollMinuteWheel()
+    await expectDate('2000-01-01 00:01:00')
+    await expectDateString('Sat Jan 1201 AM ')
+  })
+
+  it('-180', async () => {
+    await setTimeZoneOffsetInMinutes(-180)
+    await scrollMinuteWheel()
+    await expectDate('2000-01-01 00:01:00')
+    await expectDateString('Fri Dec 31801 PM ')
+  })
+
+  describe('daylight saving', () => {
+    const firstOfJuly = new Date(2000, 6, 1, 0, 0)
+    const firstOfJune = new Date(2000, 5, 1, 0, 0)
+
+    before(async () => {
+      await setMaximumDate(firstOfJuly)
+      await setDate(firstOfJune)
+    })
+
+    it('undefined', async () => {
+      await setDate(firstOfJune)
+      await setTimeZoneOffsetInMinutes(undefined)
+      await scrollMinuteWheel()
+      await expectDate('2000-06-01 00:01:00')
+      await expectDateString('Thu Jun 11201 AM ')
+    })
+
+    it('0', async () => {
+      await setDate(firstOfJune)
+      await setTimeZoneOffsetInMinutes(0)
+      await scrollMinuteWheel()
+      await expectDate('2000-06-01 00:01:00')
+      await expectDateString('Wed May 311001 PM ')
+    })
+
+    it('180', async () => {
+      await setDate(firstOfJune)
+      await setTimeZoneOffsetInMinutes(180)
+      await scrollMinuteWheel()
+      await expectDate('2000-06-01 00:01:00')
+      await expectDateString('Thu Jun 1101 AM ')
+    })
+  })
+})

examples/detox/e2e/utils.js

@@ -35,6 +35,7 @@ exports.setLocale = changeProp('locale')
 exports.setMinimumDate = changeProp('minimumDate')
 exports.setMaximumDate = changeProp('maximumDate')
 exports.setMinuteInterval = changeProp('minuteInterval')
+exports.setTimeZoneOffsetInMinutes = changeProp('timeZoneOffsetInMinutes')
 exports.setMode = changeProp('mode')
 exports.scrollWheel = scrollWheel
 exports.expectDate = expectDate

examples/detox/src/CustomPropValue.js

@@ -8,6 +8,7 @@ export default function CustomPropValue(props) {
     const getPropValue = () => {
         if (propValue === "undefined") return undefined
         if (propName === "minuteInterval") return parseInt(propValue)
+        if (propName === "timeZoneOffsetInMinutes") return parseInt(propValue)
         if (["date", "maximumDate", "minimumDate"].includes(propName)) return new Date(propValue)
         return propValue
     }

examples/detox/src/propPickers/DateChange.js

@@ -13,7 +13,6 @@ export default class extends Component {
             )
           }
         />
-        <Text />
         <Button
           title="Add 1 hour"
           onPress={() =>
@@ -22,7 +21,6 @@ export default class extends Component {
             )
           }
         />
-        <Text />
         <Button
           title="Add 24 hours"
           onPress={() =>
@@ -31,6 +29,14 @@ export default class extends Component {
             )
           }
         />
+        <Button
+          title="Add 1 year"
+          onPress={() =>
+            this.props.onChange(
+              new Date(this.props.value.getTime() + 60 * 60 * 24 * 1000 * 365)
+            )
+          }
+        />
       </React.Fragment>
     )
   }