Add v2 mocks (software-mansion#1230)

Co-authored-by: Jakub Gonet <[email protected]>

Author: mgambati

mock.js

@@ -17,6 +17,7 @@ const {
   Platform,
   processColor,
 } = require('react-native');
+const ReanimatedV2 = require('./src/reanimated2/mock');
 
 function NOOP() {}
 
@@ -234,7 +235,10 @@ module.exports = {
 
   ...Reanimated,
 
-  default: Reanimated,
+  default: {
+    ...Reanimated,
+    ...ReanimatedV2,
+  },
 
   Transitioning: {
     View: createTransitioningComponent(View),

src/reanimated2/mock.js

@@ -0,0 +1,59 @@
+/* eslint-disable standard/no-callback-literal */
+const NOOP = () => {};
+const ID = (t) => t;
+
+const ReanimatedV2 = {
+  useSharedValue: (value) => ({ value }),
+  useDerivedValue: (a) => ({ value: a() }),
+  useAnimatedScrollHandler: () => NOOP,
+  useAnimatedGestureHandler: () => NOOP,
+  useAnimatedStyle: (style) => style,
+  useAnimatedRef: () => ({ current: null }),
+  useAnimatedReaction: NOOP,
+
+  withTiming: (toValue, _, cb) => {
+    cb && setTimeout(() => cb(true), 0);
+    return toValue;
+  },
+  withSpring: (toValue, _, cb) => {
+    cb && setTimeout(() => cb(true), 0);
+    return toValue;
+  },
+  withDecay: (_, cb) => {
+    cb && setTimeout(() => cb(true), 0);
+    return 0;
+  },
+  cancelAnimation: NOOP,
+  delay: (_, b) => b,
+  sequence: () => 0,
+  repeat: (a) => a,
+  measure: () => ({
+    x: 0,
+    y: 0,
+    width: 0,
+    height: 0,
+    pageX: 0,
+    pageY: 0,
+  }),
+  Easing: {
+    linear: ID,
+    ease: ID,
+    quad: ID,
+    cubic: ID,
+    poly: ID,
+    sin: ID,
+    circle: ID,
+    exp: ID,
+    elastic: ID,
+    back: ID,
+    bounce: ID,
+    bezier: ID,
+    in: ID,
+    out: ID,
+    inOut: ID,
+  },
+};
+
+module.exports = {
+  ...ReanimatedV2,
+};