diff --git a/app/components/post_body/post_body.test.js b/app/components/post_body/post_body.test.js
index c040209cb..aa78520cb 100644
--- a/app/components/post_body/post_body.test.js
+++ b/app/components/post_body/post_body.test.js
@@ -67,4 +67,60 @@ describe('PostBody', () => {
 
         expect(wrapper.find(PostBodyAdditionalContent).exists()).toBeFalsy();
     });
+
+    test('measurePost should update isLongPost when showLongPost is false', () => {
+        const event = {
+            nativeEvent: {
+                layout: {
+                    height: null,
+                },
+            },
+        };
+
+        const props = {...baseProps, showLongPost: false};
+        const wrapper = shallowWithIntl(<PostBody {...props}/>);
+        const instance = wrapper.instance();
+
+        expect(wrapper.state('isLongPost')).toEqual(false);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight');
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(true);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight') - 1;
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(false);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight') + 1;
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(true);
+    });
+
+    test('measurePost should not update isLongPost when showLongPost is true', () => {
+        const event = {
+            nativeEvent: {
+                layout: {
+                    height: null,
+                },
+            },
+        };
+
+        const props = {...baseProps, showLongPost: true};
+        const wrapper = shallowWithIntl(<PostBody {...props}/>);
+        const instance = wrapper.instance();
+
+        expect(wrapper.state('isLongPost')).toEqual(false);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight');
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(false);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight') - 1;
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(false);
+
+        event.nativeEvent.layout.height = wrapper.state('maxHeight') + 1;
+        instance.measurePost(event);
+        expect(wrapper.state('isLongPost')).toEqual(false);
+    });
 });