From 5f381fd35729b470f3274d3e39199600bc81cc69 Mon Sep 17 00:00:00 2001
From: Pieter De Baets <pieterdb@fb.com>
Date: Fri, 9 Sep 2016 10:53:49 -0700
Subject: [PATCH] Move buildStyleInterpolator-test to open-source, remove
 unused files

Reviewed By: bestander

Differential Revision: D3820939

fbshipit-source-id: 2ff114326642b522f162c6cce7853c8b3f0c138b
---
 .../__tests__/buildStyleInterpolator-test.js  | 292 ++++++++++++++++++
 1 file changed, 292 insertions(+)
 create mode 100644 Libraries/Utilities/__tests__/buildStyleInterpolator-test.js

diff --git a/Libraries/Utilities/__tests__/buildStyleInterpolator-test.js b/Libraries/Utilities/__tests__/buildStyleInterpolator-test.js
new file mode 100644
index 000000000..4cb1b29fd
--- /dev/null
+++ b/Libraries/Utilities/__tests__/buildStyleInterpolator-test.js
@@ -0,0 +1,292 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+'use strict';
+
+jest.unmock('buildStyleInterpolator');
+
+var buildStyleInterpolator = require('buildStyleInterpolator');
+
+var validateEmpty = function(interpolator, value, validator) {
+  var emptyObject = {};
+  var changed = interpolator(emptyObject, value);
+  validator(emptyObject);
+  expect(changed).toBe(true);
+  changed = interpolator(emptyObject, value);
+  expect(changed).toBe(false);
+};
+describe('buildStyleInterpolator', function() {
+  it('should linearly interpolate without extrapolating', function() {
+    var testAnim = {
+      opacity: {
+        from: 100,
+        to: 200,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        extrapolate: false,
+      },
+      left: {
+        from: 200,
+        to: 300,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        extrapolate: false,
+      },
+      top: {
+        type: 'constant',
+        value: 23.5,
+      },
+    };
+    var interpolator = buildStyleInterpolator(testAnim);
+    validateEmpty(interpolator, 0, function(res) {
+      expect(res).toEqual({
+        opacity: 100,
+        left: 200,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 1, function(res) {
+      expect(res).toEqual({
+        opacity: 200,
+        left: 300,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, -0.1, function(res) {
+      expect(res).toEqual({
+        opacity: 100,
+        left: 200,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 1.1, function(res) {
+      expect(res).toEqual({
+        opacity: 200,
+        left: 300,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 0.5, function(res) {
+      expect(res).toEqual({
+        opacity: 150,
+        left: 250,
+        top: 23.5,
+      });
+    });
+  });
+  it('should linearly interpolate with extrapolating', function() {
+    var testAnim = {
+      opacity: {
+        from: 100,
+        to: 200,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        round: 1,  // To make testing easier
+        extrapolate: true,
+      },
+      left: {
+        from: 200,
+        to: 300,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        round: 1,  // To make testing easier
+        extrapolate: true,
+      },
+      top: {
+        type: 'constant',
+        value: 23.5,
+      },
+    };
+    var interpolator = buildStyleInterpolator(testAnim);
+    validateEmpty(interpolator, 0, function(res) {
+      expect(res).toEqual({
+        opacity: 100,
+        left: 200,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 1, function(res) {
+      expect(res).toEqual({
+        opacity: 200,
+        left: 300,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, -0.1, function(res) {
+      expect(res).toEqual({
+        opacity: 90,
+        left: 190,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 1.1, function(res) {
+      expect(res).toEqual({
+        opacity: 210,
+        left: 310,
+        top: 23.5,
+      });
+    });
+    validateEmpty(interpolator, 0.5, function(res) {
+      expect(res).toEqual({
+        opacity: 150,
+        left: 250,
+        top: 23.5,
+      });
+    });
+  });
+  it('should round accordingly', function() {
+    var testAnim = {
+      opacity: {
+        from: 0,
+        to: 1,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        round: 2,  // As in one over two
+        extrapolate: true,
+      },
+    };
+    var interpolator = buildStyleInterpolator(testAnim);
+    validateEmpty(interpolator, 0, function(res) {
+      expect(res).toEqual({
+        opacity: 0,
+      });
+    });
+    validateEmpty(interpolator, 0.5, function(res) {
+      expect(res).toEqual({
+        opacity: 0.5,
+      });
+    });
+    validateEmpty(interpolator, 0.4, function(res) {
+      expect(res).toEqual({
+        opacity: 0.5,
+      });
+    });
+    validateEmpty(interpolator, 0.26, function(res) {
+      expect(res).toEqual({
+        opacity: 0.5,
+      });
+    });
+    validateEmpty(interpolator, 0.74, function(res) {
+      expect(res).toEqual({
+        opacity: 0.5,
+      });
+    });
+    validateEmpty(interpolator, 0.76, function(res) {
+      expect(res).toEqual({
+        opacity: 1.0,
+      });
+    });
+  });
+  it('should detect chnages correctly', function() {
+    var testAnim = {
+      opacity: {
+        from: 0,
+        to: 1,
+        min: 0,
+        max: 1,
+        type: 'linear',
+        round: 2,  // As in one over two
+        extrapolate: false,
+      },
+    };
+    var interpolator = buildStyleInterpolator(testAnim);
+    var obj = {};
+    var res = interpolator(obj, 0);
+    expect(obj).toEqual({
+      opacity: 0,
+    });
+    expect(res).toBe(true);
+
+    res = interpolator(obj, 0);
+    // No change detected
+    expect(obj).toEqual({
+      opacity: 0,
+    });
+    expect(res).toBe(false);
+
+    // No change detected
+    res = interpolator(obj, 1);
+    expect(obj).toEqual({
+      opacity: 1,
+    });
+    expect(res).toBe(true);
+
+    // Still no change detected even when clipping
+    res = interpolator(obj, 1);
+    expect(obj).toEqual({
+      opacity: 1,
+    });
+    expect(res).toBe(false);
+  });
+
+  it('should step', function() {
+    var testAnim = {
+      opacity: {
+        threshold: 13,
+        from: 10,
+        to: 20,
+        type: 'step',
+      },
+    };
+    var interpolator = buildStyleInterpolator(testAnim);
+    var obj = {};
+    var res = interpolator(obj, 0);
+    expect(obj).toEqual({
+      opacity: 10,
+    });
+    expect(res).toBe(true);
+
+    res = interpolator(obj, 0);
+    // No change detected
+    expect(obj).toEqual({
+      opacity: 10,
+    });
+    expect(res).toBe(false);
+
+    // No change detected
+    res = interpolator(obj, 10);
+    expect(obj).toEqual({
+      opacity: 10,
+    });
+    expect(res).toBe(false);
+
+    // No change detected
+    res = interpolator(obj, 12);
+    expect(obj).toEqual({
+      opacity: 10,
+    });
+    expect(res).toBe(false);
+
+    // No change detected
+    res = interpolator(obj, 13);
+    expect(obj).toEqual({
+      opacity: 20,
+    });
+    expect(res).toBe(true);
+
+    // No change detected
+    res = interpolator(obj, 13.1);
+    expect(obj).toEqual({
+      opacity: 20,
+    });
+    expect(res).toBe(false);
+
+    // No change detected
+    res = interpolator(obj, 25);
+    expect(obj).toEqual({
+      opacity: 20,
+    });
+    expect(res).toBe(false);
+  });
+});