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//
// GTMUIImage+ResizeTest.m
//
// Copyright 2009 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import "GTMSenTestCase.h"
#import "GTMUIImage+Resize.h"
@interface GTMUIImage_ResizeTest : GTMTestCase
- (UIImage *)testImageNamed:(NSString *)imageName;
@end
@implementation GTMUIImage_ResizeTest
- (UIImage *)testImageNamed:(NSString *)imageName {
NSBundle *myBundle = [NSBundle bundleForClass:[self class]];
NSString *imagePath = [myBundle pathForResource:imageName ofType:@"png"];
UIImage *result = [UIImage imageWithContentsOfFile:imagePath];
return result;
}
- (void)testNilImage {
UIImage *image = [[UIImage alloc] init];
UIImage *actual = [image gtm_imageByResizingToSize:CGSizeMake(100, 100)
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertNil(actual, @"Invalid inputs should return nil");
}
- (void)testInvalidInput {
UIImage *actual;
UIImage *image
= [UIImage imageNamed:@"GTMUIImage+Resize_100x50.png"];
actual = [image gtm_imageByResizingToSize:CGSizeZero
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertNil(actual, @"CGSizeZero resize should be ignored.");
actual = [image gtm_imageByResizingToSize:CGSizeMake(0.1, 0.1)
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertNil(actual, @"Invalid size should be ignored.");
actual = [image gtm_imageByResizingToSize:CGSizeMake(-100, -100)
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertNil(actual, @"Invalid size should be ignored.");
}
- (void)testImageByResizingWithoutPreservingAspectRatio {
UIImage *actual = nil;
// Square image.
UIImage *originalImage = [self testImageNamed:@"GTMUIImage+Resize_100x100"];
XCTAssertNotNil(originalImage, @"Unable to read image.");
// Resize with same aspect ratio.
CGSize size50x50 = CGSizeMake(50, 50);
actual = [originalImage gtm_imageByResizingToSize:size50x50
preserveAspectRatio:NO
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], size50x50),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size50x50),
NSStringFromCGSize([actual size]));
// Resize with different aspect ratio
CGSize size60x40 = CGSizeMake(60, 40);
actual = [originalImage gtm_imageByResizingToSize:size60x40
preserveAspectRatio:NO
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], size60x40),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size60x40),
NSStringFromCGSize([actual size]));
CGSize size40x60 = CGSizeMake(40, 60);
actual = [originalImage gtm_imageByResizingToSize:size40x60
preserveAspectRatio:NO
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], size40x60),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size40x60),
NSStringFromCGSize([actual size]));
}
- (void)testImageByResizingPreservingAspectRatioWithoutClip {
UIImage *actual = nil;
UIImage *landscapeImage = [self testImageNamed:@"GTMUIImage+Resize_100x50"];
XCTAssertNotNil(landscapeImage, @"Unable to read image.");
// Landscape resize to 50x50, but clipped to 50x25.
CGSize size50x50 = CGSizeMake(50, 50);
CGSize expected50x25 = CGSizeMake(50, 25);
actual = [landscapeImage gtm_imageByResizingToSize:size50x50
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected50x25),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected50x25),
NSStringFromCGSize([actual size]));
// Landscape resize to 60x40, but clipped to 60x30.
CGSize size60x40 = CGSizeMake(60, 40);
CGSize expected60x30 = CGSizeMake(60, 30);
actual = [landscapeImage gtm_imageByResizingToSize:size60x40
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected60x30),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected60x30),
NSStringFromCGSize([actual size]));
// Landscape resize to 40x60, but clipped to 40x20.
CGSize expected40x20 = CGSizeMake(40, 20);
CGSize size40x60 = CGSizeMake(40, 60);
actual = [landscapeImage gtm_imageByResizingToSize:size40x60
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected40x20),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected40x20),
NSStringFromCGSize([actual size]));
// Portrait Image
UIImage *portraitImage = [self testImageNamed:@"GTMUIImage+Resize_50x100"];
// Portrait resize to 50x50, but clipped to 25x50.
CGSize expected25x50 = CGSizeMake(25, 50);
actual = [portraitImage gtm_imageByResizingToSize:size50x50
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected25x50),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected25x50),
NSStringFromCGSize([actual size]));
// Portrait resize to 60x40, but clipped to 20x40.
CGSize expected20x40 = CGSizeMake(20, 40);
actual = [portraitImage gtm_imageByResizingToSize:size60x40
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected20x40),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected20x40),
NSStringFromCGSize([actual size]));
// Portrait resize to 40x60, but clipped to 30x60.
CGSize expected30x60 = CGSizeMake(30, 60);
actual = [portraitImage gtm_imageByResizingToSize:size40x60
preserveAspectRatio:YES
trimToFit:NO];
XCTAssertTrue(CGSizeEqualToSize([actual size], expected30x60),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(expected30x60),
NSStringFromCGSize([actual size]));
}
- (void)testImageByResizingPreservingAspectRatioWithClip {
UIImage *actual = nil;
UIImage *landscapeImage = [self testImageNamed:@"GTMUIImage+Resize_100x50"];
XCTAssertNotNil(landscapeImage, @"Unable to read image.");
// Landscape resize to 50x50
CGSize size50x50 = CGSizeMake(50, 50);
actual = [landscapeImage gtm_imageByResizingToSize:size50x50
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size50x50),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size50x50),
NSStringFromCGSize([actual size]));
// Landscape resize to 60x40
CGSize size60x40 = CGSizeMake(60, 40);
actual = [landscapeImage gtm_imageByResizingToSize:size60x40
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size60x40),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size60x40),
NSStringFromCGSize([actual size]));
// Landscape resize to 40x60
CGSize size40x60 = CGSizeMake(40, 60);
actual = [landscapeImage gtm_imageByResizingToSize:size40x60
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size40x60),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size40x60),
NSStringFromCGSize([actual size]));
// Portrait Image.
UIImage *portraitImage = [self testImageNamed:@"GTMUIImage+Resize_50x100"];
// Portrait resize to 50x50
actual = [portraitImage gtm_imageByResizingToSize:size50x50
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size50x50),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size50x50),
NSStringFromCGSize([actual size]));
// Portrait resize to 60x40
actual = [portraitImage gtm_imageByResizingToSize:size60x40
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size60x40),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size60x40),
NSStringFromCGSize([actual size]));
// Portrait resize to 40x60.
actual = [portraitImage gtm_imageByResizingToSize:size40x60
preserveAspectRatio:YES
trimToFit:YES];
XCTAssertTrue(CGSizeEqualToSize([actual size], size40x60),
@"Resized image should equal size: %@ actual: %@",
NSStringFromCGSize(size40x60),
NSStringFromCGSize([actual size]));
}
- (void)testImageByRotating {
UIImage *actual = nil;
UIImage *landscapeImage = [self testImageNamed:@"GTMUIImage+Resize_100x50"];
XCTAssertNotNil(landscapeImage, @"Unable to read image.");
// Rotate 90 degrees.
actual = [landscapeImage gtm_imageByRotating:UIImageOrientationRight];
// Rotate 180 degrees.
actual = [landscapeImage gtm_imageByRotating:UIImageOrientationDown];
// Rotate 270 degrees.
actual = [landscapeImage gtm_imageByRotating:UIImageOrientationLeft];
// Rotate 360 degrees.
actual = [landscapeImage gtm_imageByRotating:UIImageOrientationUp];
}
@end
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