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//
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// EXPMatchers+FBSnapshotTest.h
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// Artsy
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//
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// Created by Daniel Doubrovkine on 1/14/14.
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// Copyright (c) 2014 Artsy Inc. All rights reserved.
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//
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#import "EXPMatchers+FBSnapshotTest.h"
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#import <Expecta/EXPMatcherHelpers.h>
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#import <FBSnapshotTestCase/FBSnapshotTestController.h>
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@interface EXPExpectFBSnapshotTest()
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@property (nonatomic, strong) NSString *referenceImagesDirectory;
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@end
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@implementation EXPExpectFBSnapshotTest
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+ (id)instance
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{
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static EXPExpectFBSnapshotTest *instance = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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instance = [[self alloc] init];
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});
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return instance;
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}
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+ (BOOL)compareSnapshotOfViewOrLayer:(id)viewOrLayer snapshot:(NSString *)snapshot testCase:(id)testCase record:(BOOL)record referenceDirectory:(NSString *)referenceDirectory error:(NSError **)error
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{
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FBSnapshotTestController *snapshotController = [[FBSnapshotTestController alloc] initWithTestClass:[testCase class]];
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snapshotController.recordMode = record;
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snapshotController.referenceImagesDirectory = referenceDirectory;
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snapshotController.usesDrawViewHierarchyInRect = [Expecta usesDrawViewHierarchyInRect];
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if (! snapshotController.referenceImagesDirectory) {
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[NSException raise:@"Missing value for referenceImagesDirectory" format:@"Call [[EXPExpectFBSnapshotTest instance] setReferenceImagesDirectory"];
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}
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return [snapshotController compareSnapshotOfViewOrLayer:viewOrLayer
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selector:NSSelectorFromString(snapshot)
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identifier:nil
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tolerance:0
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error:error];
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}
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+ (NSString *)combinedError:(NSString *)message test:(NSString *)test error:(NSError *)error
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{
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NSAssert(message, @"missing message");
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NSAssert(test, @"missing test name");
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NSMutableArray *ary = [NSMutableArray array];
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[ary addObject:[NSString stringWithFormat:@"%@ %@", message, test]];
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for(NSString *key in error.userInfo.keyEnumerator) {
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[ary addObject:[NSString stringWithFormat:@" %@: %@", key, [error.userInfo valueForKey:key]]];
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}
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return [ary componentsJoinedByString:@"\n"];
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}
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@end
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void setGlobalReferenceImageDir(char *reference) {
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NSString *referenceImagesDirectory = [NSString stringWithFormat:@"%s", reference];
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[[EXPExpectFBSnapshotTest instance] setReferenceImagesDirectory:referenceImagesDirectory];
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};
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@interface EXPExpect(ReferenceDirExtension)
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- (NSString *)_getDefaultReferenceDirectory;
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@end
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@implementation EXPExpect(ReferenceDirExtension)
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- (NSString *)_getDefaultReferenceDirectory
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{
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NSString *globalReference = [[EXPExpectFBSnapshotTest instance] referenceImagesDirectory];
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if (globalReference) {
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return globalReference;
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}
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// Search the test file's path to find the first folder with the substring "tests"
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// then append "/ReferenceImages" and use that
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NSString *testFileName = [NSString stringWithCString:self.fileName encoding:NSUTF8StringEncoding];
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NSArray *pathComponents = [testFileName pathComponents];
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for (NSString *folder in pathComponents) {
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if ([folder.lowercaseString rangeOfString:@"tests"].location != NSNotFound) {
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NSArray *folderPathComponents = [pathComponents subarrayWithRange:NSMakeRange(0, [pathComponents indexOfObject:folder] + 1)];
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return [NSString stringWithFormat:@"%@/ReferenceImages", [folderPathComponents componentsJoinedByString:@"/"]];
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}
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}
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[NSException raise:@"Could not infer reference image folder" format:@"You should provide a reference dir using setGlobalReferenceImageDir(FB_REFERENCE_IMAGE_DIR);"];
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return nil;
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}
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@end
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// If you're bringing in Speca via CocoaPods
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// use the test path to get the test's image file URL
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#if __has_include(<Specta/Specta.h>)
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#import <Specta/Specta.h>
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#import <Specta/SpectaUtility.h>
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#import <Specta/SPTExample.h>
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NSString *sanitizedTestPath();
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NSString *sanitizedTestPath(){
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id compiledExample = [[NSThread currentThread] threadDictionary][@"SPTCurrentSpec"]; // SPTSpec
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NSString *name;
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if ([compiledExample respondsToSelector:@selector(name)]) {
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// Specta 0.3 syntax
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name = [compiledExample performSelector:@selector(name)];
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} else if ([compiledExample respondsToSelector:@selector(fileName)]) {
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// Specta 0.2 syntax
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name = [compiledExample performSelector:@selector(fileName)];
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}
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name = [[[[name componentsSeparatedByString:@" test_"] lastObject] stringByReplacingOccurrencesOfString:@"__" withString:@"_"] stringByReplacingOccurrencesOfString:@"]" withString:@""];
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return name;
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}
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EXPMatcherImplementationBegin(haveValidSnapshot, (void)){
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__block NSError *error = nil;
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match(^BOOL{
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NSString *referenceImageDir = [self _getDefaultReferenceDirectory];
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NSString *name = sanitizedTestPath();
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if ([actual isKindOfClass:UIViewController.class]) {
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[actual beginAppearanceTransition:YES animated:NO];
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[actual endAppearanceTransition];
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actual = [actual view];
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}
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return [EXPExpectFBSnapshotTest compareSnapshotOfViewOrLayer:actual snapshot:name testCase:[self testCase] record:NO referenceDirectory:referenceImageDir error:&error];
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});
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failureMessageForTo(^NSString *{
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return [EXPExpectFBSnapshotTest combinedError:@"expected a matching snapshot in" test:sanitizedTestPath() error:error];
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});
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failureMessageForNotTo(^NSString *{
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return [EXPExpectFBSnapshotTest combinedError:@"expected to not have a matching snapshot in" test:sanitizedTestPath() error:error];
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});
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}
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EXPMatcherImplementationEnd
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EXPMatcherImplementationBegin(recordSnapshot, (void)) {
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__block NSError *error = nil;
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BOOL actualIsViewLayerOrViewController = ([actual isKindOfClass:UIView.class] || [actual isKindOfClass:CALayer.class] || [actual isKindOfClass:UIViewController.class]);
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prerequisite(^BOOL{
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return actualIsViewLayerOrViewController;
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});
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match(^BOOL{
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NSString *referenceImageDir = [self _getDefaultReferenceDirectory];
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// For view controllers do the viewWill/viewDid dance, then pass view through
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if ([actual isKindOfClass:UIViewController.class]) {
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[actual beginAppearanceTransition:YES animated:NO];
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[actual endAppearanceTransition];
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actual = [actual view];
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}
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[EXPExpectFBSnapshotTest compareSnapshotOfViewOrLayer:actual snapshot:sanitizedTestPath() testCase:[self testCase] record:YES referenceDirectory:referenceImageDir error:&error];
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return NO;
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});
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failureMessageForTo(^NSString *{
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if (!actualIsViewLayerOrViewController) {
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return [EXPExpectFBSnapshotTest combinedError:@"Expected a View, Layer or View Controller." test:sanitizedTestPath() error:nil];
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}
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if (error) {
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return [EXPExpectFBSnapshotTest combinedError:@"expected to record a snapshot in" test:sanitizedTestPath() error:error];
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} else {
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return [NSString stringWithFormat:@"snapshot %@ successfully recorded, replace recordSnapshot with a check", sanitizedTestPath()];
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}
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});
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failureMessageForNotTo(^NSString *{
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if (error) {
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return [EXPExpectFBSnapshotTest combinedError:@"expected to record a snapshot in" test:sanitizedTestPath() error:error];
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} else {
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return [NSString stringWithFormat:@"snapshot %@ successfully recorded, replace recordSnapshot with a check", sanitizedTestPath()];
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}
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});
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}
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EXPMatcherImplementationEnd
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#else
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// If you don't have Speca stub the functions
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EXPMatcherImplementationBegin(haveValidSnapshot, (void)){
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prerequisite(^BOOL{
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return NO;
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});
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failureMessageForTo(^NSString *{
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return @"you need Specta installed via CocoaPods to use haveValidSnapshot, use haveValidSnapshotNamed instead";
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});
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failureMessageForNotTo(^NSString *{
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return @"you need Specta installed via CocoaPods to use haveValidSnapshot, use haveValidSnapshotNamed instead";
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});
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}
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EXPMatcherImplementationEnd
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EXPMatcherImplementationBegin(recordSnapshot, (void)) {
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prerequisite(^BOOL{
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return NO;
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});
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failureMessageForTo(^NSString *{
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return @"you need Specta installed via CocoaPods to use recordSnapshot, use recordSnapshotNamed instead";
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});
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failureMessageForNotTo(^NSString *{
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return @"you need Specta installed via CocoaPods to use recordSnapshot, use recordSnapshotNamed instead";
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});
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}
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EXPMatcherImplementationEnd
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#endif
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EXPMatcherImplementationBegin(haveValidSnapshotNamed, (NSString *snapshot)){
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BOOL snapshotIsNil = (snapshot == nil);
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__block NSError *error = nil;
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prerequisite(^BOOL{
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return !(snapshotIsNil);
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});
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match(^BOOL{
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NSString *referenceImageDir = [self _getDefaultReferenceDirectory];
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if ([actual isKindOfClass:UIViewController.class]) {
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[actual beginAppearanceTransition:YES animated:NO];
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[actual endAppearanceTransition];
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actual = [actual view];
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}
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return [EXPExpectFBSnapshotTest compareSnapshotOfViewOrLayer:actual snapshot:snapshot testCase:[self testCase] record:NO referenceDirectory:referenceImageDir error:&error];
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});
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failureMessageForTo(^NSString *{
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return [EXPExpectFBSnapshotTest combinedError:@"expected a matching snapshot named" test:snapshot error:error];
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});
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failureMessageForNotTo(^NSString *{
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return [EXPExpectFBSnapshotTest combinedError:@"expected not to have a matching snapshot named" test:snapshot error:error];
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});
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}
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EXPMatcherImplementationEnd
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EXPMatcherImplementationBegin(recordSnapshotNamed, (NSString *snapshot)) {
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BOOL snapshotExists = (snapshot != nil);
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BOOL actualIsViewLayerOrViewController = ([actual isKindOfClass:UIView.class] || [actual isKindOfClass:CALayer.class] || [actual isKindOfClass:UIViewController.class]);
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__block NSError *error = nil;
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id actualRef = actual;
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prerequisite(^BOOL{
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return actualRef && snapshotExists && actualIsViewLayerOrViewController;
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});
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match(^BOOL{
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NSString *referenceImageDir = [self _getDefaultReferenceDirectory];
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// For view controllers do the viewWill/viewDid dance, then pass view through
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if ([actual isKindOfClass:UIViewController.class]) {
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[actual beginAppearanceTransition:YES animated:NO];
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[actual endAppearanceTransition];
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actual = [actual view];
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}
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[EXPExpectFBSnapshotTest compareSnapshotOfViewOrLayer:actual snapshot:snapshot testCase:[self testCase] record:YES referenceDirectory:referenceImageDir error:&error];
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return NO;
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});
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failureMessageForTo(^NSString *{
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if (!actualIsViewLayerOrViewController) {
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return [EXPExpectFBSnapshotTest combinedError:@"Expected a View, Layer or View Controller." test:snapshot error:nil];
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}
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if (error) {
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return [EXPExpectFBSnapshotTest combinedError:@"expected to record a matching snapshot named" test:snapshot error:error];
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} else {
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return [NSString stringWithFormat:@"snapshot %@ successfully recorded, replace recordSnapshot with a check", snapshot];
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}
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});
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failureMessageForNotTo(^NSString *{
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if (!actualIsViewLayerOrViewController) {
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return [EXPExpectFBSnapshotTest combinedError:@"Expected a View, Layer or View Controller." test:snapshot error:nil];
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}
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if (error) {
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return [EXPExpectFBSnapshotTest combinedError:@"expected to record a matching snapshot named" test:snapshot error:error];
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} else {
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return [NSString stringWithFormat:@"snapshot %@ successfully recorded, replace recordSnapshot with a check", snapshot];
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}
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});
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}
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EXPMatcherImplementationEnd
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