From b869d025ff24e7134c9aae5afe47f71d676b73f5 Mon Sep 17 00:00:00 2001
From: Nadine Salter <nadi@fb.com>
Date: Fri, 20 Mar 2015 17:01:10 -0700
Subject: [PATCH] [tests] ASSnapshotTestCase.

---
 AsyncDisplayKit.xcodeproj/project.pbxproj     |  17 ++++++
 .../ASImageNodeSnapshotTests.m                |  35 ++++++++++++
 AsyncDisplayKitTests/ASSnapshotTestCase.h     |  26 +++++++++
 AsyncDisplayKitTests/ASSnapshotTestCase.mm    |  54 ++++++++++++++++++
 .../testRenderLogoSquare@2x.png               | Bin 0 -> 14527 bytes
 Podfile                                       |   1 +
 Podfile.lock                                  |   3 +
 7 files changed, 136 insertions(+)
 create mode 100644 AsyncDisplayKitTests/ASImageNodeSnapshotTests.m
 create mode 100644 AsyncDisplayKitTests/ASSnapshotTestCase.h
 create mode 100644 AsyncDisplayKitTests/ASSnapshotTestCase.mm
 create mode 100644 AsyncDisplayKitTests/ReferenceImages/ASImageNodeSnapshotTests/testRenderLogoSquare@2x.png

diff --git a/AsyncDisplayKit.xcodeproj/project.pbxproj b/AsyncDisplayKit.xcodeproj/project.pbxproj
index c0e7fd0173..021f2aaf63 100644
--- a/AsyncDisplayKit.xcodeproj/project.pbxproj
+++ b/AsyncDisplayKit.xcodeproj/project.pbxproj
@@ -27,6 +27,7 @@
 		055F1A3919ABD413004DAFF1 /* ASRangeController.mm in Sources */ = {isa = PBXBuildFile; fileRef = 055F1A3719ABD413004DAFF1 /* ASRangeController.mm */; };
 		055F1A3C19ABD43F004DAFF1 /* ASCellNode.h in Headers */ = {isa = PBXBuildFile; fileRef = 055F1A3A19ABD43F004DAFF1 /* ASCellNode.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		055F1A3D19ABD43F004DAFF1 /* ASCellNode.m in Sources */ = {isa = PBXBuildFile; fileRef = 055F1A3B19ABD43F004DAFF1 /* ASCellNode.m */; };
+		056D21551ABCEF50001107EF /* ASImageNodeSnapshotTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 056D21541ABCEF50001107EF /* ASImageNodeSnapshotTests.m */; };
 		0574D5E219C110940097DC25 /* ASTableViewProtocols.h in Headers */ = {isa = PBXBuildFile; fileRef = 0574D5E119C110610097DC25 /* ASTableViewProtocols.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		0587F9BD1A7309ED00AFF0BA /* ASEditableTextNode.h in Headers */ = {isa = PBXBuildFile; fileRef = 0587F9BB1A7309ED00AFF0BA /* ASEditableTextNode.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		0587F9BE1A7309ED00AFF0BA /* ASEditableTextNode.mm in Sources */ = {isa = PBXBuildFile; fileRef = 0587F9BC1A7309ED00AFF0BA /* ASEditableTextNode.mm */; };
@@ -135,6 +136,7 @@
 		058D0A84195D060300B7D73C /* ASDisplayNodeExtraIvars.h in Headers */ = {isa = PBXBuildFile; fileRef = 058D0A45195D058D00B7D73C /* ASDisplayNodeExtraIvars.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		05A6D05A19D0EB64002DD95E /* ASDealloc2MainObject.h in Headers */ = {isa = PBXBuildFile; fileRef = 05A6D05819D0EB64002DD95E /* ASDealloc2MainObject.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		05A6D05B19D0EB64002DD95E /* ASDealloc2MainObject.m in Sources */ = {isa = PBXBuildFile; fileRef = 05A6D05919D0EB64002DD95E /* ASDealloc2MainObject.m */; settings = {COMPILER_FLAGS = "-fno-objc-arc"; }; };
+		05EA6FE71AC0966E00E35788 /* ASSnapshotTestCase.mm in Sources */ = {isa = PBXBuildFile; fileRef = 05EA6FE61AC0966E00E35788 /* ASSnapshotTestCase.mm */; };
 		05F20AA41A15733C00DCA68A /* ASImageProtocols.h in Headers */ = {isa = PBXBuildFile; fileRef = 05F20AA31A15733C00DCA68A /* ASImageProtocols.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		1950C4491A3BB5C1005C8279 /* ASEqualityHelpers.h in Headers */ = {isa = PBXBuildFile; fileRef = 1950C4481A3BB5C1005C8279 /* ASEqualityHelpers.h */; };
 		2911485C1A77147A005D0878 /* ASControlNodeTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 2911485B1A77147A005D0878 /* ASControlNodeTests.m */; };
@@ -210,6 +212,8 @@
 		055F1A3719ABD413004DAFF1 /* ASRangeController.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASRangeController.mm; sourceTree = "<group>"; };
 		055F1A3A19ABD43F004DAFF1 /* ASCellNode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASCellNode.h; sourceTree = "<group>"; };
 		055F1A3B19ABD43F004DAFF1 /* ASCellNode.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASCellNode.m; sourceTree = "<group>"; };
+		056D21501ABCEDA1001107EF /* ASSnapshotTestCase.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASSnapshotTestCase.h; sourceTree = "<group>"; };
+		056D21541ABCEF50001107EF /* ASImageNodeSnapshotTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASImageNodeSnapshotTests.m; sourceTree = "<group>"; };
 		0574D5E119C110610097DC25 /* ASTableViewProtocols.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ASTableViewProtocols.h; sourceTree = "<group>"; };
 		0587F9BB1A7309ED00AFF0BA /* ASEditableTextNode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASEditableTextNode.h; sourceTree = "<group>"; };
 		0587F9BC1A7309ED00AFF0BA /* ASEditableTextNode.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASEditableTextNode.mm; sourceTree = "<group>"; };
@@ -295,6 +299,7 @@
 		058D0A45195D058D00B7D73C /* ASDisplayNodeExtraIvars.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASDisplayNodeExtraIvars.h; sourceTree = "<group>"; };
 		05A6D05819D0EB64002DD95E /* ASDealloc2MainObject.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ASDealloc2MainObject.h; path = ../Details/ASDealloc2MainObject.h; sourceTree = "<group>"; };
 		05A6D05919D0EB64002DD95E /* ASDealloc2MainObject.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ASDealloc2MainObject.m; path = ../Details/ASDealloc2MainObject.m; sourceTree = "<group>"; };
+		05EA6FE61AC0966E00E35788 /* ASSnapshotTestCase.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASSnapshotTestCase.mm; sourceTree = "<group>"; };
 		05F20AA31A15733C00DCA68A /* ASImageProtocols.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASImageProtocols.h; sourceTree = "<group>"; };
 		1950C4481A3BB5C1005C8279 /* ASEqualityHelpers.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASEqualityHelpers.h; sourceTree = "<group>"; };
 		2911485B1A77147A005D0878 /* ASControlNodeTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASControlNodeTests.m; sourceTree = "<group>"; };
@@ -443,6 +448,9 @@
 		058D09C5195D04C000B7D73C /* AsyncDisplayKitTests */ = {
 			isa = PBXGroup;
 			children = (
+				056D21501ABCEDA1001107EF /* ASSnapshotTestCase.h */,
+				05EA6FE61AC0966E00E35788 /* ASSnapshotTestCase.mm */,
+				056D21541ABCEF50001107EF /* ASImageNodeSnapshotTests.m */,
 				29CDC2E11AAE70D000833CA4 /* ASBasicImageDownloaderContextTests.m */,
 				296A0A341A951ABF005ACEAA /* ASBatchFetchingTests.m */,
 				2911485B1A77147A005D0878 /* ASControlNodeTests.m */,
@@ -865,6 +873,8 @@
 				058D0A3C195D057000B7D73C /* ASMutableAttributedStringBuilderTests.m in Sources */,
 				058D0A3F195D057000B7D73C /* ASTextNodeShadowerTests.m in Sources */,
 				29CDC2E21AAE70D000833CA4 /* ASBasicImageDownloaderContextTests.m in Sources */,
+				056D21551ABCEF50001107EF /* ASImageNodeSnapshotTests.m in Sources */,
+				05EA6FE71AC0966E00E35788 /* ASSnapshotTestCase.mm in Sources */,
 				058D0A3B195D057000B7D73C /* ASDisplayNodeTestsHelper.m in Sources */,
 				058D0A3A195D057000B7D73C /* ASDisplayNodeTests.m in Sources */,
 				052EE0661A159FEF002C6279 /* ASMultiplexImageNodeTests.m in Sources */,
@@ -1014,6 +1024,8 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"DEBUG=1",
 					"$(inherited)",
+					"COCOAPODS=1",
+					"FB_REFERENCE_IMAGE_DIR=\"\\\"$(SOURCE_ROOT)/$(PROJECT_NAME)Tests/ReferenceImages\\\"\"",
 				);
 				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
@@ -1034,6 +1046,11 @@
 				);
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "AsyncDisplayKit/AsyncDisplayKit-Prefix.pch";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"$(inherited)",
+					"COCOAPODS=1",
+					"FB_REFERENCE_IMAGE_DIR=\"\\\"$(SOURCE_ROOT)/$(PROJECT_NAME)Tests/ReferenceImages\\\"\"",
+				);
 				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
 				INFOPLIST_FILE = "AsyncDisplayKitTests/AsyncDisplayKitTests-Info.plist";
diff --git a/AsyncDisplayKitTests/ASImageNodeSnapshotTests.m b/AsyncDisplayKitTests/ASImageNodeSnapshotTests.m
new file mode 100644
index 0000000000..e5a48b5e5c
--- /dev/null
+++ b/AsyncDisplayKitTests/ASImageNodeSnapshotTests.m
@@ -0,0 +1,35 @@
+/* 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 "ASSnapshotTestCase.h"
+
+#import <AsyncDisplayKit/AsyncDisplayKit.h>
+
+@interface ASImageNodeSnapshotTests : ASSnapshotTestCase
+@end
+
+@implementation ASImageNodeSnapshotTests
+
+- (UIImage *)testImage
+{
+  NSString *path = [[NSBundle bundleForClass:[self class]] pathForResource:@"logo-square"
+                                                                    ofType:@"png" inDirectory:@"TestResources"];
+  return [UIImage imageWithContentsOfFile:path];
+}
+
+- (void)testRenderLogoSquare
+{
+  // trivial test case to ensure ASSnapshotTestCase works
+  ASImageNode *imageNode = [[ASImageNode alloc] init];
+  imageNode.image = [self testImage];
+  imageNode.frame = CGRectMake(0, 0, 100, 100);
+
+  ASSnapshotVerifyNode(imageNode, nil);
+}
+
+@end
diff --git a/AsyncDisplayKitTests/ASSnapshotTestCase.h b/AsyncDisplayKitTests/ASSnapshotTestCase.h
new file mode 100644
index 0000000000..a523f57e03
--- /dev/null
+++ b/AsyncDisplayKitTests/ASSnapshotTestCase.h
@@ -0,0 +1,26 @@
+/* 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 "FBSnapshotTestCase.h"
+
+#import <AsyncDisplayKit/ASDisplayNode.h>
+
+#define ASSnapshotVerifyNode(node__, identifier__) \
+{ \
+  [ASSnapshotTestCase hackilySynchronouslyRecursivelyRenderNode:node__]; \
+  FBSnapshotVerifyLayer(node__.layer, identifier__); \
+}
+
+@interface ASSnapshotTestCase : FBSnapshotTestCase
+
+/**
+ * Hack for testing.  ASDisplayNode lacks an explicit -render method, so we manually hit its layout & display codepaths.
+ */
++ (void)hackilySynchronouslyRecursivelyRenderNode:(ASDisplayNode *)node;
+
+@end
diff --git a/AsyncDisplayKitTests/ASSnapshotTestCase.mm b/AsyncDisplayKitTests/ASSnapshotTestCase.mm
new file mode 100644
index 0000000000..cce364ab34
--- /dev/null
+++ b/AsyncDisplayKitTests/ASSnapshotTestCase.mm
@@ -0,0 +1,54 @@
+/* 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 "ASSnapshotTestCase.h"
+
+#import <AsyncDisplayKit/ASDisplayNodeInternal.h>
+
+@implementation ASSnapshotTestCase
+
++ (void)_layoutAndDisplayNode:(ASDisplayNode *)node
+{
+  if (![node __shouldLoadViewOrLayer]) {
+    return;
+  }
+
+  CALayer *layer = node.layer;
+
+  [layer setNeedsLayout];
+  [layer layoutIfNeeded];
+
+  [layer setNeedsDisplay];
+  [layer displayIfNeeded];
+}
+
++ (void)_recursivelyLayoutAndDisplayNode:(ASDisplayNode *)node
+{
+  for (ASDisplayNode *subnode in node.subnodes) {
+    [self _recursivelyLayoutAndDisplayNode:subnode];
+  }
+
+  [self _layoutAndDisplayNode:node];
+}
+
++ (void)_recursivelySetDisplaysAsynchronously:(BOOL)flag forNode:(ASDisplayNode *)node
+{
+  node.displaysAsynchronously = flag;
+
+  for (ASDisplayNode *subnode in node.subnodes) {
+    subnode.displaysAsynchronously = flag;
+  }
+}
+
++ (void)hackilySynchronouslyRecursivelyRenderNode:(ASDisplayNode *)node
+{
+  [self _recursivelySetDisplaysAsynchronously:NO forNode:node];
+  [self _recursivelyLayoutAndDisplayNode:node];
+}
+
+@end
diff --git a/AsyncDisplayKitTests/ReferenceImages/ASImageNodeSnapshotTests/testRenderLogoSquare@2x.png b/AsyncDisplayKitTests/ReferenceImages/ASImageNodeSnapshotTests/testRenderLogoSquare@2x.png
new file mode 100644
index 0000000000000000000000000000000000000000..896dc7abf09a39cb792b6ed956e39c11b3019f20
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HcmV?d00001

diff --git a/Podfile b/Podfile
index cb95bcd97b..eb7cb4bb47 100644
--- a/Podfile
+++ b/Podfile
@@ -4,4 +4,5 @@ platform :ios, '7.0'
 
 target :'AsyncDisplayKitTests', :exclusive => true do
   pod 'OCMock', '~> 2.2'
+  pod 'FBSnapshotTestCase'
 end
diff --git a/Podfile.lock b/Podfile.lock
index acabe8b1c3..14f152df04 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -1,10 +1,13 @@
 PODS:
+  - FBSnapshotTestCase (1.5)
   - OCMock (2.2.4)
 
 DEPENDENCIES:
+  - FBSnapshotTestCase
   - OCMock (~> 2.2)
 
 SPEC CHECKSUMS:
+  FBSnapshotTestCase: e2914fbaabccea1dcc773d6a16b1c24540642488
   OCMock: 6db79185520e24f9f299548f2b8b07e41d881bd5
 
 COCOAPODS: 0.35.0