//
//  MTLValueTransformerSpec.m
//  Mantle
//
//  Created by Justin Spahr-Summers on 2012-09-11.
//  Copyright (c) 2012 GitHub. All rights reserved.
//

#import <Mantle/Mantle.h>
#import <Nimble/Nimble.h>
#import <Quick/Quick.h>

QuickSpecBegin(MTLValueTransformerSpec)

it(@"should return a forward transformer with a block", ^{
	MTLValueTransformer *transformer = [MTLValueTransformer transformerWithBlock:^(NSString *str) {
		return [str stringByAppendingString:@"bar"];
	}];

	expect(transformer).notTo(beNil());
	expect(@([transformer.class allowsReverseTransformation])).to(beFalsy());

	expect([transformer transformedValue:@"foo"]).to(equal(@"foobar"));
	expect([transformer transformedValue:@"bar"]).to(equal(@"barbar"));
});

it(@"should return a reversible transformer with a block", ^{
	MTLValueTransformer *transformer = [MTLValueTransformer reversibleTransformerWithBlock:^(NSString *str) {
		return [str stringByAppendingString:@"bar"];
	}];

	expect(transformer).notTo(beNil());
	expect(@([transformer.class allowsReverseTransformation])).to(beTruthy());

	expect([transformer transformedValue:@"foo"]).to(equal(@"foobar"));
	expect([transformer reverseTransformedValue:@"foo"]).to(equal(@"foobar"));
});

it(@"should return a reversible transformer with forward and reverse blocks", ^{
	MTLValueTransformer *transformer = [MTLValueTransformer
		reversibleTransformerWithForwardBlock:^(NSString *str) {
			return [str stringByAppendingString:@"bar"];
		}
		reverseBlock:^(NSString *str) {
			return [str substringToIndex:str.length - 3];
		}];

	expect(transformer).notTo(beNil());
	expect(@([transformer.class allowsReverseTransformation])).to(beTruthy());

	expect([transformer transformedValue:@"foo"]).to(equal(@"foobar"));
	expect([transformer reverseTransformedValue:@"foobar"]).to(equal(@"foo"));
});

QuickSpecEnd