fix: fix START => FINISH transition for sidebar not exceeding viewport

Author: vursen

src/fsm-transitions.js

@@ -6,7 +6,16 @@ export default {
       to: states.FINISH,
       when: (d) => [
         d.isSideInnerWithinPath === true,
-        d.viewportTop + d.sideInnerHeight > d.finishPoint
+        d.isSideInnerWithinViewport === false,
+        d.viewportBottom > d.finishPoint
+      ]
+    },
+    {
+      to: states.FINISH,
+      when: (d) => [
+        d.isSideInnerWithinPath === true,
+        d.isSideInnerWithinViewport === true,
+        d.viewportTop + d.sideInnerHeight + d.bottomSpacing > d.finishPoint
       ]
     },
     {
@@ -60,7 +69,7 @@ export default {
     },
     {
       to: states.FINISH,
-      when: (d) => [d.viewportTop + d.sideInnerHeight > d.finishPoint]
+      when: (d) => [d.viewportBottom > d.finishPoint]
     },
     {
       to: states.TOP_FIXED,

test/transitions.test.js

@@ -205,11 +205,12 @@ describe('transitions', function() {
     // isSideInnerWithinPath === true
     describe('when height(content) > height(sidebarInner)', () => {
       beforeEach(async () => {
-        setContentHeight(sidebarInnerHeight * 2);
+        setContentHeight(sidebarInnerHeight * 1.5);
         await nextFrame();
       });
 
-      it('START => BOTTOM_FIXED', async () => {
+      it.only('START => BOTTOM_FIXED', async () => {
+        await scrollTo();
         await scrollTo(getElementBottom(sidebarInnerElement) - window.innerHeight + 1);
         await forceUpdate();
         expectTransitionTo(BOTTOM_FIXED);
@@ -220,7 +221,7 @@ describe('transitions', function() {
         await forceUpdate();
         expectTransitionTo(BOTTOM_FIXED);
 
-        setContentHeight(sidebarInnerHeight / 2);
+        setContentHeight(sidebarInnerHeight / 1.5);
         await forceUpdate();
         expectTransitionTo(START);
       });
@@ -274,7 +275,7 @@ describe('transitions', function() {
         await forceUpdate();
         expectTransitionTo(UNFIXED);
 
-        setContentHeight(sidebarInnerHeight / 2);
+        setContentHeight(sidebarInnerHeight / 1.5);
         await forceUpdate();
         expectTransitionTo(START);
       });
@@ -408,7 +409,7 @@ describe('transitions', function() {
       });
 
       it('START => FINISH', async () => {
-        await scrollTo(getElementBottom(contentElement) - window.innerHeight);
+        await scrollTo(getElementBottom(contentElement) - window.innerHeight + 1);
         await forceUpdate();
         expectTransitionTo(FINISH);
       });