//
//  ASDimensionTests.mm
//  AsyncDisplayKit
//
//  Copyright (c) 2014-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.
//

#import <XCTest/XCTest.h>
#import "ASXCTExtensions.h"
#import "ASDimension.h"


@interface ASDimensionTests : XCTestCase
@end

@implementation ASDimensionTests

- (void)testCreatingDimensionUnitAutos
{
  XCTAssertNoThrow(ASDimensionMake(ASDimensionUnitAuto, 0));
  XCTAssertThrows(ASDimensionMake(ASDimensionUnitAuto, 100));
  XCTAssertThrows(ASDimensionMake(@""));
  ASXCTAssertEqualDimensions(ASDimensionAuto, ASDimensionMake(@"auto"));
}

- (void)testCreatingDimensionUnitFraction
{
  XCTAssertNoThrow(ASDimensionMake(ASDimensionUnitFraction, 0.5));
  ASXCTAssertEqualDimensions(ASDimensionMake(ASDimensionUnitFraction, 0.5), ASDimensionMake(@"50%"));
}

- (void)testCreatingDimensionUnitPoints
{
  XCTAssertNoThrow(ASDimensionMake(ASDimensionUnitPoints, 100));
  ASXCTAssertEqualDimensions(ASDimensionMake(ASDimensionUnitPoints, 100), ASDimensionMake(@"100pt"));
}

- (void)testIntersectingOverlappingSizeRangesReturnsTheirIntersection
{
  //  range: |---------|
  //  other:      |----------|
  // result:      |----|

  ASSizeRange range = {{0,0}, {10,10}};
  ASSizeRange other = {{7,7}, {15,15}};
  ASSizeRange result = ASSizeRangeIntersect(range, other);
  ASSizeRange expected = {{7,7}, {10,10}};
  XCTAssertTrue(ASSizeRangeEqualToSizeRange(result, expected), @"Expected %@ but got %@", NSStringFromASSizeRange(expected), NSStringFromASSizeRange(result));
}

- (void)testIntersectingSizeRangeWithRangeThatContainsItReturnsSameRange
{
  //  range:    |-----|
  //  other:  |---------|
  // result:    |-----|

  ASSizeRange range = {{2,2}, {8,8}};
  ASSizeRange other = {{0,0}, {10,10}};
  ASSizeRange result = ASSizeRangeIntersect(range, other);
  ASSizeRange expected = {{2,2}, {8,8}};
  XCTAssertTrue(ASSizeRangeEqualToSizeRange(result, expected), @"Expected %@ but got %@", NSStringFromASSizeRange(expected), NSStringFromASSizeRange(result));
}

- (void)testIntersectingSizeRangeWithRangeContainedWithinItReturnsContainedRange
{
  //  range:  |---------|
  //  other:    |-----|
  // result:    |-----|

  ASSizeRange range = {{0,0}, {10,10}};
  ASSizeRange other = {{2,2}, {8,8}};
  ASSizeRange result = ASSizeRangeIntersect(range, other);
  ASSizeRange expected = {{2,2}, {8,8}};
  XCTAssertTrue(ASSizeRangeEqualToSizeRange(result, expected), @"Expected %@ but got %@", NSStringFromASSizeRange(expected), NSStringFromASSizeRange(result));
}

- (void)testIntersectingSizeRangeWithNonOverlappingRangeToRightReturnsSinglePointNearestOtherRange
{
  //  range: |-----|
  //  other:          |---|
  // result:       *

  ASSizeRange range = {{0,0}, {5,5}};
  ASSizeRange other = {{10,10}, {15,15}};
  ASSizeRange result = ASSizeRangeIntersect(range, other);
  ASSizeRange expected = {{5,5}, {5,5}};
  XCTAssertTrue(ASSizeRangeEqualToSizeRange(result, expected), @"Expected %@ but got %@", NSStringFromASSizeRange(expected), NSStringFromASSizeRange(result));
}

- (void)testIntersectingSizeRangeWithNonOverlappingRangeToLeftReturnsSinglePointNearestOtherRange
{
  //  range:          |---|
  //  other: |-----|
  // result:          *

  ASSizeRange range = {{10,10}, {15,15}};
  ASSizeRange other = {{0,0}, {5,5}};
  ASSizeRange result = ASSizeRangeIntersect(range, other);
  ASSizeRange expected = {{10,10}, {10,10}};
  XCTAssertTrue(ASSizeRangeEqualToSizeRange(result, expected), @"Expected %@ but got %@", NSStringFromASSizeRange(expected), NSStringFromASSizeRange(result));
}

@end