mathpad/MathPadTests/MPRangeTests.m

//
//  MPRangeTests.m
//  MathPad
//
//  Created by Kim Wittenburg on 21.04.14.
//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
//

#import <XCTest/XCTest.h>

#import "MPRange.h"

@interface MPRangeTests : XCTestCase

@end

@implementation MPRangeTests

- (void)testInitialization {
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndex:1] length:5];
    XCTAssertEqualObjects(range.location, [[NSIndexPath alloc] initWithIndex:1]);
    XCTAssertEqual(range.length, 5);
    
    range = [[MPRange alloc] initWithRange:NSMakeRange(3, 2)];
    XCTAssertEqualObjects(range.location, [[NSIndexPath alloc] initWithIndex:3]);
    XCTAssertEqual(range.length, 2);
    
    range = [MPRange emptyRange];
    XCTAssertEqualObjects(range.location, [[NSIndexPath alloc] init]);
    XCTAssertEqual(range.length, 0);
}

- (void)testMaxRange {
    NSUInteger indexes[] = {5, 2, 7, 3};
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:indexes length:4] length:5];
    NSUInteger expectedIndexes[] = {5, 2, 7, 8};
    XCTAssertEqualObjects([range maxRange], [[NSIndexPath alloc] initWithIndexes:expectedIndexes length:4]);
}

- (void)testRangeAtLastIndex {
    NSUInteger indexes[] = {5, 2, 7, 3};
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:indexes length:4] length:5];
    XCTAssertTrue(NSEqualRanges(range.rangeAtLastIndex, NSMakeRange(3, 5)));
}

- (void)testEquality {
    NSUInteger indexes[] = {5, 2, 7, 3};
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:indexes length:4] length:5];
    NSUInteger otherIndexes[] = {5, 2, 7, 3};
    MPRange *otherRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:otherIndexes length:4] length:5];
    NSUInteger yetOtherIndexes[] = {5, 2, 6, 3};
    MPRange *yetAnotherRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:yetOtherIndexes length:4] length:5];
    XCTAssertTrue([range isEqual:otherRange]);
    XCTAssertFalse([range isEqual:yetAnotherRange]);
}

- (void)testCopying {
    NSUInteger indexes[] = {5, 2, 7, 3};
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:indexes length:4] length:5];
    MPRange *copy = [range copy];
    XCTAssertNotEqual(range, copy);
    XCTAssertEqualObjects(range, copy);
}

- (void)testContainsRange {
    NSUInteger indexes[] = {5, 2, 7, 3};
    MPRange *range = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:indexes length:4] length:5];

    NSUInteger shorterPathIndexes[] = {5, 2};
    MPRange *shorterPathRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:shorterPathIndexes length:2] length:5];
    
    NSUInteger longerPathIndexes[] = {5, 2, 7, 3, 5};
    MPRange *longerPathRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:longerPathIndexes length:5] length:5];

    NSUInteger differentPathIndexes[] = {5, 3, 7, 3};
    MPRange *differentPathRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:differentPathIndexes length:4] length:5];

    NSUInteger equalRangeIndexes[] = {5, 2, 7, 3};
    MPRange *equalRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:equalRangeIndexes length:4] length:5];
    
    NSUInteger containedRangeIndexes[] = {5, 2, 7, 4};
    MPRange *containedRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:containedRangeIndexes length:4] length:2];

    NSUInteger largerRangeIndexes[] = {5, 2, 7, 4};
    MPRange *largerRange = [[MPRange alloc] initWithLocation:[[NSIndexPath alloc] initWithIndexes:largerRangeIndexes length:4] length:7];

    XCTAssertFalse([range containsRange:shorterPathRange]);
    XCTAssertTrue([range containsRange:longerPathRange]);
    XCTAssertFalse([range containsRange:differentPathRange]);
    XCTAssertTrue([range containsRange:equalRange]);
    XCTAssertTrue([range containsRange:containedRange]);
    XCTAssertFalse([range containsRange:largerRange]);
}

@end