[segment] unify native initialization methods

packages/expo-analytics-segment/android/src/main/java/expo/modules/analytics/segment/SegmentModule.java

@@ -112,7 +112,7 @@ public String getName() {
   }
 
   @ExpoMethod
-  public void initializeAndroid(final String writeKey, Promise promise) {
+  public void initialize(final String writeKey, Promise promise) {
     Analytics.Builder builder = new Analytics.Builder(mContext, writeKey);
     builder.tag(Integer.toString(sCurrentTag++));
     builder.use(FirebaseIntegration.FACTORY);
@@ -121,12 +121,6 @@ public void initializeAndroid(final String writeKey, Promise promise) {
     promise.resolve(null);
   }
 
-  @ExpoMethod
-  public void initializeIOS(final String writeKey, Promise promise) {
-    // NO-OP. Need this here because Segment has different keys for iOS and Android.
-    promise.reject("E_WRONG_PLATFORM", "Method initializeIOS should not be called on Android, please file an issue on GitHub.");
-  }
-
   @ExpoMethod
   public void identify(final String userId, Promise promise) {
     if (mClient != null) {

packages/expo-analytics-segment/ios/EXSegment/EXSegment.m

@@ -16,8 +16,8 @@ @implementation EXSegment
 
 UM_EXPORT_MODULE(ExponentSegment)
 
-UM_EXPORT_METHOD_AS(initializeIOS,
-                    initializeIOS:(NSString *)writeKey
+UM_EXPORT_METHOD_AS(initialize,
+                    initialize:(NSString *)writeKey
                     resolver:(UMPromiseResolveBlock)resolve
                     rejecter:(UMPromiseRejectBlock)reject)
 {
@@ -30,15 +30,6 @@ @implementation EXSegment
   resolve(nil);
 }
 
-UM_EXPORT_METHOD_AS(initializeAndroid,
-                    initializeAndroid:(NSString *)writeKey
-                    resolver:(UMPromiseResolveBlock)resolve
-                    rejecter:(UMPromiseRejectBlock)reject)
-{
-  // NO-OP. Need this here because Segment has different keys for iOS and Android.
-  reject(@"E_WRONG_PLATFORM", @"Method initializeAndroid should not be called on iOS, please file an issue on GitHub.", nil);
-}
-
 UM_EXPORT_METHOD_AS(identify,
                     identify:(NSString *)userId
                     resolver:(UMPromiseResolveBlock)resolve

packages/expo-analytics-segment/src/Segment.ts

@@ -9,13 +9,18 @@ export type SegmentOptions = {
 };
 
 export function initialize(options: SegmentOptions): void {
-  if (Platform.OS === 'android') {
-    ExponentSegment.initializeAndroid(options.androidWriteKey);
-  } else if (Platform.OS === 'ios') {
-    ExponentSegment.initializeIOS(options.iosWriteKey);
-  } else {
+  if (!ExponentSegment.initialize) {
     throw new UnavailabilityError('expo-analytics-segment', 'initialize');
   }
+  const platformWriteKey = Platform.select({
+    ios: options.iosWriteKey,
+    android: options.androidWriteKey,
+  });
+  if (platformWriteKey) {
+    ExponentSegment.initialize(platformWriteKey);
+  } else {
+    throw new Error('You must provide a platform-specific write key to initialize Segment.');
+  }
 }
 
 export function identify(userId: string): void {

packages/expo-analytics-segment/src/__tests__/Segment-test.android.ts

@@ -6,9 +6,8 @@ const mockOptions = {
   iosWriteKey: 'ios-write-key',
 };
 
-it(`initializes`, () => {
+it(`initializes once for android`, () => {
   Segment.initialize(mockOptions);
-
-  expect(ExponentSegment.initializeAndroid).toHaveBeenCalledWith(mockOptions.androidWriteKey);
-  expect(ExponentSegment.initializeIOS).not.toHaveBeenCalled();
+  expect(ExponentSegment.initialize).toHaveBeenCalledWith(mockOptions.androidWriteKey);
+  expect(ExponentSegment.initialize).toHaveBeenCalledTimes(1);
 });

packages/expo-analytics-segment/src/__tests__/Segment-test.ios.ts

@@ -6,8 +6,18 @@ const mockOptions = {
   iosWriteKey: 'ios-write-key',
 };
 
-it(`initializes`, () => {
+it(`initializes once for ios`, () => {
   Segment.initialize(mockOptions);
-  expect(ExponentSegment.initializeIOS).toHaveBeenCalledWith(mockOptions.iosWriteKey);
-  expect(ExponentSegment.initializeAndroid).not.toHaveBeenCalled();
+  expect(ExponentSegment.initialize).toHaveBeenCalledWith(mockOptions.iosWriteKey);
+  expect(ExponentSegment.initialize).toHaveBeenCalledTimes(1);
+});
+
+it(`calling with an empty object results in error`, () => {
+  expect(() => {
+    Segment.initialize({});
+  }).toThrowError(
+    new Error('You must provide a platform-specific write key to initialize Segment.')
+  );
+
+  expect(ExponentSegment.initialize).toHaveBeenCalledTimes(0);
 });

packages/jest-expo/src/preset/expoModules.js

@@ -584,15 +584,14 @@ module.exports = {
           { key: 3, argumentsCount: 1, name: 'screen' },
           { key: 4, argumentsCount: 1, name: 'identify' },
           { key: 5, argumentsCount: 2, name: 'identifyWithTraits' },
-          { key: 6, argumentsCount: 1, name: 'initializeAndroid' },
-          { key: 7, argumentsCount: 2, name: 'trackWithProperties' },
-          { key: 8, argumentsCount: 1, name: 'initializeIOS' },
-          { key: 9, argumentsCount: 2, name: 'groupWithTraits' },
+          { key: 6, argumentsCount: 2, name: 'trackWithProperties' },
+          { key: 7, argumentsCount: 2, name: 'groupWithTraits' },
+          { key: 8, argumentsCount: 1, name: 'initialize' },
+          { key: 9, argumentsCount: 0, name: 'getEnabledAsync' },
           { key: 10, argumentsCount: 2, name: 'alias' },
           { key: 11, argumentsCount: 1, name: 'group' },
           { key: 12, argumentsCount: 1, name: 'track' },
-          { key: 13, argumentsCount: 0, name: 'getEnabledAsync' },
-          { key: 14, argumentsCount: 0, name: 'reset' },
+          { key: 13, argumentsCount: 0, name: 'reset' },
         ],
         ExponentSpeech: [
           { key: 0, argumentsCount: 3, name: 'speak' },