change section-specific SeparatorComponent -> ItemSeparatorComponent for consistency

Summary: Not sure how I missed this in 3ce31c24da

Reviewed By: yungsters

Differential Revision: D4731083

fbshipit-source-id: 860ed9d2f99312cd02b84ba467ba66afc5cdd5c5

Libraries/CustomComponents/Lists/SectionList.js

@@ -49,7 +49,7 @@ type SectionBase<SectionItemT> = {
 
   // Optional props will override list-wide props just for this section.
   renderItem?: ?(info: {item: SectionItemT, index: number}) => ?React.Element<any>,
-  SeparatorComponent?: ?ReactClass<any>,
+  ItemSeparatorComponent?: ?ReactClass<any>,
   keyExtractor?: (item: SectionItemT) => string,
 
   // TODO: support more optional/override props

Libraries/CustomComponents/Lists/VirtualizedSectionList.js

@@ -52,7 +52,7 @@ type SectionBase = {
 
   // Optional props will override list-wide props just for this section.
   renderItem?: ?({item: SectionItem, index: number}) => ?React.Element<*>,
-  SeparatorComponent?: ?ReactClass<*>,
+  ItemSeparatorComponent?: ?ReactClass<*>,
   keyExtractor?: (item: SectionItem) => string,
 
   // TODO: support more optional/override props
@@ -229,15 +229,15 @@ class VirtualizedSectionList<SectionT: SectionBase>
     if (!info) {
       return null;
     }
-    const SeparatorComponent = info.section.SeparatorComponent || this.props.ItemSeparatorComponent;
+    const ItemSeparatorComponent = info.section.ItemSeparatorComponent || this.props.ItemSeparatorComponent;
     const {SectionSeparatorComponent} = this.props;
     const isLastItemInList = index === this.state.childProps.getItemCount() - 1;
     const isLastItemInSection = info.index === info.section.data.length - 1;
     if (SectionSeparatorComponent && isLastItemInSection && !isLastItemInList) {
       return SectionSeparatorComponent;
     }
-    if (SeparatorComponent && !isLastItemInSection && !isLastItemInList) {
-      return SeparatorComponent;
+    if (ItemSeparatorComponent && !isLastItemInSection && !isLastItemInList) {
+      return ItemSeparatorComponent;
     }
     return null;
   }

Libraries/CustomComponents/Lists/__tests__/SectionList-test.js

@@ -48,7 +48,7 @@ describe('SectionList', () => {
             renderItem: ({item}) => <itemForSection1 value={item.id} />,
             key: '1st Section',
             keyExtractor: (item, index) => item.id,
-            SeparatorComponent: () => <itemSeparatorForSection1 />,
+            ItemSeparatorComponent: () => <itemSeparatorForSection1 />,
             data: [{id: 'i1s1'}, {id: 'i2s1'}],
           },
           {

Libraries/CustomComponents/Lists/__tests__/__snapshots__/SectionList-test.js.snap

@@ -96,7 +96,7 @@ exports[`SectionList renders all the bells and whistles 1`] = `
   data={
     Array [
       Object {
-        "SeparatorComponent": [Function],
+        "ItemSeparatorComponent": [Function],
         "data": Array [
           Object {
             "id": "i1s1",
@@ -152,7 +152,7 @@ exports[`SectionList renders all the bells and whistles 1`] = `
   sections={
     Array [
       Object {
-        "SeparatorComponent": [Function],
+        "ItemSeparatorComponent": [Function],
         "data": Array [
           Object {
             "id": "i1s1",