119 lines
4.1 KiB
Objective-C
119 lines
4.1 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#import <XCTest/XCTest.h>
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#import <RCTAnimation/RCTAnimationUtils.h>
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@interface RCTAnimationUtilsTests : XCTestCase
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@end
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static CGFloat RCTSimpleInterpolation(CGFloat value, NSArray<NSNumber *> *inputRange, NSArray<NSNumber *> *outputRange) {
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return RCTInterpolateValueInRange(value,
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inputRange,
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outputRange,
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EXTRAPOLATE_TYPE_EXTEND,
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EXTRAPOLATE_TYPE_EXTEND);
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}
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@implementation RCTAnimationUtilsTests
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// RCTInterpolateValueInRange
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- (void)testSimpleOneToOneMapping
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{
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NSArray<NSNumber *> *input = @[@0, @1];
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NSArray<NSNumber *> *output = @[@0, @1];
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XCTAssertEqual(RCTSimpleInterpolation(0, input, output), 0);
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XCTAssertEqual(RCTSimpleInterpolation(0.5, input, output), 0.5);
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XCTAssertEqual(RCTSimpleInterpolation(0.8, input, output), 0.8);
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XCTAssertEqual(RCTSimpleInterpolation(1, input, output), 1);
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}
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- (void)testWiderOutputRange
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{
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NSArray<NSNumber *> *input = @[@0, @1];
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NSArray<NSNumber *> *output = @[@100, @200];
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XCTAssertEqual(RCTSimpleInterpolation(0, input, output), 100);
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XCTAssertEqual(RCTSimpleInterpolation(0.5, input, output), 150);
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XCTAssertEqual(RCTSimpleInterpolation(0.8, input, output), 180);
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XCTAssertEqual(RCTSimpleInterpolation(1, input, output), 200);
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}
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- (void)testWiderInputRange
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{
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NSArray<NSNumber *> *input = @[@2000, @3000];
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NSArray<NSNumber *> *output = @[@1, @2];
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XCTAssertEqual(RCTSimpleInterpolation(2000, input, output), 1);
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XCTAssertEqual(RCTSimpleInterpolation(2250, input, output), 1.25);
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XCTAssertEqual(RCTSimpleInterpolation(2800, input, output), 1.8);
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XCTAssertEqual(RCTSimpleInterpolation(3000, input, output), 2);
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}
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- (void)testManySegments
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{
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NSArray<NSNumber *> *input = @[@-1, @1, @5];
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NSArray<NSNumber *> *output = @[@0, @10, @20];
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XCTAssertEqual(RCTSimpleInterpolation(-1, input, output), 0);
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XCTAssertEqual(RCTSimpleInterpolation(0, input, output), 5);
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XCTAssertEqual(RCTSimpleInterpolation(1, input, output), 10);
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XCTAssertEqual(RCTSimpleInterpolation(2, input, output), 12.5);
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XCTAssertEqual(RCTSimpleInterpolation(5, input, output), 20);
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}
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- (void)testExtendExtrapolate
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{
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NSArray<NSNumber *> *input = @[@10, @20];
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NSArray<NSNumber *> *output = @[@0, @1];
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XCTAssertEqual(RCTSimpleInterpolation(30, input, output), 2);
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XCTAssertEqual(RCTSimpleInterpolation(5, input, output), -0.5);
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}
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- (void)testClampExtrapolate
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{
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NSArray<NSNumber *> *input = @[@10, @20];
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NSArray<NSNumber *> *output = @[@0, @1];
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CGFloat value;
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value = RCTInterpolateValueInRange(30,
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input,
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output,
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EXTRAPOLATE_TYPE_CLAMP,
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EXTRAPOLATE_TYPE_CLAMP);
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XCTAssertEqual(value, 1);
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value = RCTInterpolateValueInRange(5,
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input,
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output,
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EXTRAPOLATE_TYPE_CLAMP,
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EXTRAPOLATE_TYPE_CLAMP);
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XCTAssertEqual(value, 0);
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}
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- (void)testIdentityExtrapolate
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{
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NSArray<NSNumber *> *input = @[@10, @20];
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NSArray<NSNumber *> *output = @[@0, @1];
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CGFloat value;
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value = RCTInterpolateValueInRange(30,
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input,
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output,
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EXTRAPOLATE_TYPE_IDENTITY,
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EXTRAPOLATE_TYPE_IDENTITY);
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XCTAssertEqual(value, 30);
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value = RCTInterpolateValueInRange(5,
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input,
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output,
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EXTRAPOLATE_TYPE_IDENTITY,
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EXTRAPOLATE_TYPE_IDENTITY);
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XCTAssertEqual(value, 5);
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}
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@end
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