Merge remote-tracking branch 'origin/master' into rsgowman/protobuf_cpp

Also "fixed" BadFieldValueTagWithOtherValidTagsPresent test by changing
'false' to 'true'. Details: Depending on the version of nanopb, nanopb
would explicitly encode 'false', which shouldn't be done in proto3. When
it's explicitly encoded, the test worked properly. But when it was
(properly) dropped, the invalid tag is the only field that's actually
encoded, thus violating the assumptions of the test, leading to a test
failure. s/false/true fixes it, as now the boolean_value field is
(properly) encoded regardless of version.

6 files changed, 516 insertions, 6 deletions

diff --git a/Firestore/Example/Firestore.xcodeproj/project.pbxproj b/Firestore/Example/Firestore.xcodeproj/project.pbxproj
index c13e22c..eadf4e2 100644
--- a/Firestore/Example/Firestore.xcodeproj/project.pbxproj
+++ b/Firestore/Example/Firestore.xcodeproj/project.pbxproj
@@ -24,6 +24,7 @@
 /* End PBXAggregateTarget section */
 
 /* Begin PBXBuildFile section */
+		0535C1B65DADAE1CE47FA3CA /* string_format_apple_test.mm in Sources */ = {isa = PBXBuildFile; fileRef = 9CFD366B783AE27B9E79EE7A /* string_format_apple_test.mm */; };
 		132E3E53179DE287D875F3F2 /* FSTLevelDBTransactionTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 132E36BB104830BD806351AC /* FSTLevelDBTransactionTests.mm */; };
 		3B843E4C1F3A182900548890 /* remote_store_spec_test.json in Resources */ = {isa = PBXBuildFile; fileRef = 3B843E4A1F3930A400548890 /* remote_store_spec_test.json */; };
 		54131E9720ADE679001DF3FF /* string_format_test.cc in Sources */ = {isa = PBXBuildFile; fileRef = 54131E9620ADE678001DF3FF /* string_format_test.cc */; };
@@ -157,6 +158,10 @@
 		618BBEB020B89AAC00B5BCE7 /* http.pb.cc in Sources */ = {isa = PBXBuildFile; fileRef = 618BBE9720B89AAC00B5BCE7 /* http.pb.cc */; };
 		618BBEB120B89AAC00B5BCE7 /* status.pb.cc in Sources */ = {isa = PBXBuildFile; fileRef = 618BBE9920B89AAC00B5BCE7 /* status.pb.cc */; };
 		61F72C5620BC48FD001A68CB /* serializer_test.cc in Sources */ = {isa = PBXBuildFile; fileRef = 61F72C5520BC48FD001A68CB /* serializer_test.cc */; };
+		6EDD3B4620BF247500C33877 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F58D195388D20070C39A /* Foundation.framework */; };
+		6EDD3B4820BF247500C33877 /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F591195388D20070C39A /* UIKit.framework */; };
+		6EDD3B4920BF247500C33877 /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F5AF195388D20070C39A /* XCTest.framework */; };
+		6EDD3B6020BF25AE00C33877 /* FSTFuzzTestsPrincipal.mm in Sources */ = {isa = PBXBuildFile; fileRef = 6EDD3B5E20BF24D000C33877 /* FSTFuzzTestsPrincipal.mm */; };
 		71719F9F1E33DC2100824A3D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 71719F9D1E33DC2100824A3D /* LaunchScreen.storyboard */; };
 		7346E61D20325C6900FD6CEF /* FSTDispatchQueueTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 7346E61C20325C6900FD6CEF /* FSTDispatchQueueTests.mm */; };
 		73866AA12082B0A5009BB4FF /* FIRArrayTransformTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 73866A9F2082B069009BB4FF /* FIRArrayTransformTests.mm */; };
@@ -193,6 +198,8 @@
 		B6FB4690208F9BB300554BA2 /* executor_test.cc in Sources */ = {isa = PBXBuildFile; fileRef = B6FB4688208F9B9100554BA2 /* executor_test.cc */; };
 		BF219E98F1C5A1DAEB5EEC86 /* Pods_Firestore_Example_iOS_SwiftBuildTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 379B34A1536045869826D82A /* Pods_Firestore_Example_iOS_SwiftBuildTest.framework */; };
 		C1AA536F90A0A576CA2816EB /* Pods_Firestore_Example_iOS_Firestore_SwiftTests_iOS.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = BB92EB03E3F92485023F64ED /* Pods_Firestore_Example_iOS_Firestore_SwiftTests_iOS.framework */; };
+		C482E724F4B10968417C3F78 /* Pods_Firestore_FuzzTests_iOS.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B79CA87A1A01FC5329031C9B /* Pods_Firestore_FuzzTests_iOS.framework */; };
+		C80B10E79CDD7EF7843C321E /* type_traits_apple_test.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2A0CF41BA5AED6049B0BEB2C /* type_traits_apple_test.mm */; };
 		C8D3CE2343E53223E6487F2C /* Pods_Firestore_Example_iOS.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 5918805E993304321A05E82B /* Pods_Firestore_Example_iOS.framework */; };
 		DE03B2D41F2149D600A30B9C /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F5AF195388D20070C39A /* XCTest.framework */; };
 		DE03B2D51F2149D600A30B9C /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F591195388D20070C39A /* UIKit.framework */; };
@@ -228,6 +235,13 @@
 			remoteGlobalIDString = 6003F589195388D20070C39A;
 			remoteInfo = Firestore;
 		};
+		6EDD3AD320BF247500C33877 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 6003F582195388D10070C39A /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 6003F589195388D20070C39A;
+			remoteInfo = Firestore;
+		};
 		DE03B2961F2149D600A30B9C /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 6003F582195388D10070C39A /* Project object */;
@@ -264,13 +278,14 @@
 		1277F98C20D2DF0867496976 /* Pods-Firestore_IntegrationTests_iOS.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_IntegrationTests_iOS.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_IntegrationTests_iOS/Pods-Firestore_IntegrationTests_iOS.debug.xcconfig"; sourceTree = "<group>"; };
 		12F4357299652983A615F886 /* LICENSE */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text; name = LICENSE; path = ../LICENSE; sourceTree = "<group>"; };
 		132E36BB104830BD806351AC /* FSTLevelDBTransactionTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = FSTLevelDBTransactionTests.mm; sourceTree = "<group>"; };
-		1A1EED57B21433C01BBE4C51 /* any.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; path = any.pb.cc; sourceTree = "<group>"; };
+		1A1EED57B21433C01BBE4C51 /* any.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = any.pb.cc; sourceTree = "<group>"; };
+		2A0CF41BA5AED6049B0BEB2C /* type_traits_apple_test.mm */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.objcpp; path = type_traits_apple_test.mm; sourceTree = "<group>"; };
 		2B50B3A0DF77100EEE887891 /* Pods_Firestore_Tests_iOS.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Firestore_Tests_iOS.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		379B34A1536045869826D82A /* Pods_Firestore_Example_iOS_SwiftBuildTest.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Firestore_Example_iOS_SwiftBuildTest.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		3B843E4A1F3930A400548890 /* remote_store_spec_test.json */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.json; path = remote_store_spec_test.json; sourceTree = "<group>"; };
 		3C81DE3772628FE297055662 /* Pods-Firestore_Example_iOS.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_Example_iOS.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_Example_iOS/Pods-Firestore_Example_iOS.debug.xcconfig"; sourceTree = "<group>"; };
 		3F0992A4B83C60841C52E960 /* Pods-Firestore_Example_iOS.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_Example_iOS.release.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_Example_iOS/Pods-Firestore_Example_iOS.release.xcconfig"; sourceTree = "<group>"; };
-		4280A9CD97BB27955F81042C /* struct.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; path = struct.pb.cc; sourceTree = "<group>"; };
+		4280A9CD97BB27955F81042C /* struct.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = struct.pb.cc; sourceTree = "<group>"; };
 		444B7AB3F5A2929070CB1363 /* hard_assert_test.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = hard_assert_test.cc; sourceTree = "<group>"; };
 		54131E9620ADE678001DF3FF /* string_format_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = string_format_test.cc; sourceTree = "<group>"; };
 		54511E8D209805F8005BD28F /* hashing_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = hashing_test.cc; sourceTree = "<group>"; };
@@ -438,14 +453,20 @@
 		618BBEA420B89AAC00B5BCE7 /* any.pb.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = any.pb.h; sourceTree = "<group>"; };
 		61F72C5520BC48FD001A68CB /* serializer_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = serializer_test.cc; sourceTree = "<group>"; };
 		69E6C311558EC77729A16CF1 /* Pods-Firestore_Example_iOS-Firestore_SwiftTests_iOS.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_Example_iOS-Firestore_SwiftTests_iOS.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_Example_iOS-Firestore_SwiftTests_iOS/Pods-Firestore_Example_iOS-Firestore_SwiftTests_iOS.debug.xcconfig"; sourceTree = "<group>"; };
+		6EDD3B5B20BF247500C33877 /* Firestore_FuzzTests_iOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = Firestore_FuzzTests_iOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		6EDD3B5C20BF247500C33877 /* Firestore_FuzzTests_iOS-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Firestore_FuzzTests_iOS-Info.plist"; sourceTree = "<group>"; };
+		6EDD3B5E20BF24D000C33877 /* FSTFuzzTestsPrincipal.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = FSTFuzzTestsPrincipal.mm; sourceTree = "<group>"; };
 		71719F9E1E33DC2100824A3D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		7346E61C20325C6900FD6CEF /* FSTDispatchQueueTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = FSTDispatchQueueTests.mm; sourceTree = "<group>"; };
 		73866A9F2082B069009BB4FF /* FIRArrayTransformTests.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = FIRArrayTransformTests.mm; sourceTree = "<group>"; };
 		74ACEC3603BE58B57A7E8D4C /* Pods-Firestore_Example_iOS-SwiftBuildTest.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_Example_iOS-SwiftBuildTest.release.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_Example_iOS-SwiftBuildTest/Pods-Firestore_Example_iOS-SwiftBuildTest.release.xcconfig"; sourceTree = "<group>"; };
-		83B20B7B75D6CF3DACBAACC2 /* timestamp.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; path = timestamp.pb.cc; sourceTree = "<group>"; };
+		83B20B7B75D6CF3DACBAACC2 /* timestamp.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = timestamp.pb.cc; sourceTree = "<group>"; };
+		84434E57CA72951015FC71BC /* Pods-Firestore_FuzzTests_iOS.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_FuzzTests_iOS.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_FuzzTests_iOS/Pods-Firestore_FuzzTests_iOS.debug.xcconfig"; sourceTree = "<group>"; };
 		873B8AEA1B1F5CCA007FD442 /* Main.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; name = Main.storyboard; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		8E002F4AD5D9B6197C940847 /* Firestore.podspec */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text; name = Firestore.podspec; path = ../Firestore.podspec; sourceTree = "<group>"; };
-		9E766CA33AFD5A6D8C433FB5 /* empty.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; path = empty.pb.cc; sourceTree = "<group>"; };
+		97C492D2524E92927C11F425 /* Pods-Firestore_FuzzTests_iOS.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Firestore_FuzzTests_iOS.release.xcconfig"; path = "Pods/Target Support Files/Pods-Firestore_FuzzTests_iOS/Pods-Firestore_FuzzTests_iOS.release.xcconfig"; sourceTree = "<group>"; };
+		9CFD366B783AE27B9E79EE7A /* string_format_apple_test.mm */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.objcpp; path = string_format_apple_test.mm; sourceTree = "<group>"; };
+		9E766CA33AFD5A6D8C433FB5 /* empty.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = empty.pb.cc; sourceTree = "<group>"; };
 		AB356EF6200EA5EB0089B766 /* field_value_test.cc */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = field_value_test.cc; sourceTree = "<group>"; };
 		AB380CF82019382300D97691 /* target_id_generator_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = target_id_generator_test.cc; sourceTree = "<group>"; };
 		AB380CFC201A2EE200D97691 /* string_util_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = string_util_test.cc; sourceTree = "<group>"; };
@@ -478,8 +499,9 @@
 		B6FB4688208F9B9100554BA2 /* executor_test.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = executor_test.cc; sourceTree = "<group>"; };
 		B6FB4689208F9B9100554BA2 /* executor_libdispatch_test.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = executor_libdispatch_test.mm; sourceTree = "<group>"; };
 		B6FB468A208F9B9100554BA2 /* executor_test.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = executor_test.h; sourceTree = "<group>"; };
+		B79CA87A1A01FC5329031C9B /* Pods_Firestore_FuzzTests_iOS.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Firestore_FuzzTests_iOS.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		BB92EB03E3F92485023F64ED /* Pods_Firestore_Example_iOS_Firestore_SwiftTests_iOS.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Firestore_Example_iOS_Firestore_SwiftTests_iOS.framework; sourceTree = BUILT_PRODUCTS_DIR; };
-		CFAD55F01C7A1EB8420D2DFC /* wrappers.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; path = wrappers.pb.cc; sourceTree = "<group>"; };
+		CFAD55F01C7A1EB8420D2DFC /* wrappers.pb.cc */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.cpp.cpp; path = wrappers.pb.cc; sourceTree = "<group>"; };
 		D3CC3DC5338DCAF43A211155 /* README.md */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = net.daringfireball.markdown; name = README.md; path = ../README.md; sourceTree = "<group>"; };
 		DE03B2E91F2149D600A30B9C /* Firestore_IntegrationTests_iOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = Firestore_IntegrationTests_iOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		DE03B3621F215E1600A30B9C /* CAcert.pem */ = {isa = PBXFileReference; lastKnownFileType = text; path = CAcert.pem; sourceTree = "<group>"; };
@@ -533,6 +555,17 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		6EDD3B4520BF247500C33877 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				6EDD3B4620BF247500C33877 /* Foundation.framework in Frameworks */,
+				C482E724F4B10968417C3F78 /* Pods_Firestore_FuzzTests_iOS.framework in Frameworks */,
+				6EDD3B4820BF247500C33877 /* UIKit.framework in Frameworks */,
+				6EDD3B4920BF247500C33877 /* XCTest.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		DE03B2D31F2149D600A30B9C /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -607,8 +640,10 @@
 				54A0352C20A3B3D7003E0143 /* status_test.cc */,
 				54A0352B20A3B3D7003E0143 /* status_test_util.h */,
 				54A0352D20A3B3D7003E0143 /* statusor_test.cc */,
+				9CFD366B783AE27B9E79EE7A /* string_format_apple_test.mm */,
 				54131E9620ADE678001DF3FF /* string_format_test.cc */,
 				AB380CFC201A2EE200D97691 /* string_util_test.cc */,
+				2A0CF41BA5AED6049B0BEB2C /* type_traits_apple_test.mm */,
 			);
 			path = util;
 			sourceTree = "<group>";
@@ -674,6 +709,7 @@
 			isa = PBXGroup;
 			children = (
 				618BBE7A20B89AAC00B5BCE7 /* CoreTestsProtos */,
+				6EDD3B5D20BF24A700C33877 /* FuzzTests */,
 				543B4F0520A91E4B001F506D /* App */,
 				60FF7A9C1954A5C5007DD14C /* Podspec Metadata */,
 				6003F5B5195388D20070C39A /* Tests */,
@@ -690,6 +726,7 @@
 			isa = PBXGroup;
 			children = (
 				6003F58A195388D20070C39A /* Firestore_Example_iOS.app */,
+				6EDD3B5B20BF247500C33877 /* Firestore_FuzzTests_iOS.xctest */,
 				DE03B2E91F2149D600A30B9C /* Firestore_IntegrationTests_iOS.xctest */,
 				54C9EDF12040E16300A969CD /* Firestore_SwiftTests_iOS.xctest */,
 				6003F5AE195388D20070C39A /* Firestore_Tests_iOS.xctest */,
@@ -706,6 +743,7 @@
 				5918805E993304321A05E82B /* Pods_Firestore_Example_iOS.framework */,
 				BB92EB03E3F92485023F64ED /* Pods_Firestore_Example_iOS_Firestore_SwiftTests_iOS.framework */,
 				379B34A1536045869826D82A /* Pods_Firestore_Example_iOS_SwiftBuildTest.framework */,
+				B79CA87A1A01FC5329031C9B /* Pods_Firestore_FuzzTests_iOS.framework */,
 				ECEBABC7E7B693BE808A1052 /* Pods_Firestore_IntegrationTests_iOS.framework */,
 				2B50B3A0DF77100EEE887891 /* Pods_Firestore_Tests_iOS.framework */,
 				6003F591195388D20070C39A /* UIKit.framework */,
@@ -889,6 +927,15 @@
 			path = protobuf;
 			sourceTree = "<group>";
 		};
+		6EDD3B5D20BF24A700C33877 /* FuzzTests */ = {
+			isa = PBXGroup;
+			children = (
+				6EDD3B5E20BF24D000C33877 /* FSTFuzzTestsPrincipal.mm */,
+				6EDD3B5C20BF247500C33877 /* Firestore_FuzzTests_iOS-Info.plist */,
+			);
+			path = FuzzTests;
+			sourceTree = "<group>";
+		};
 		AAEA2A72CFD1FA5AD34462F7 /* Pods */ = {
 			isa = PBXGroup;
 			children = (
@@ -898,6 +945,8 @@
 				74ACEC3603BE58B57A7E8D4C /* Pods-Firestore_Example_iOS-SwiftBuildTest.release.xcconfig */,
 				3C81DE3772628FE297055662 /* Pods-Firestore_Example_iOS.debug.xcconfig */,
 				3F0992A4B83C60841C52E960 /* Pods-Firestore_Example_iOS.release.xcconfig */,
+				84434E57CA72951015FC71BC /* Pods-Firestore_FuzzTests_iOS.debug.xcconfig */,
+				97C492D2524E92927C11F425 /* Pods-Firestore_FuzzTests_iOS.release.xcconfig */,
 				1277F98C20D2DF0867496976 /* Pods-Firestore_IntegrationTests_iOS.debug.xcconfig */,
 				F354C0FE92645B56A6C6FD44 /* Pods-Firestore_IntegrationTests_iOS.release.xcconfig */,
 				E592181BFD7C53C305123739 /* Pods-Firestore_Tests_iOS.debug.xcconfig */,
@@ -1206,6 +1255,27 @@
 			productReference = 6003F5AE195388D20070C39A /* Firestore_Tests_iOS.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
 		};
+		6EDD3AD120BF247500C33877 /* Firestore_FuzzTests_iOS */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 6EDD3B5820BF247500C33877 /* Build configuration list for PBXNativeTarget "Firestore_FuzzTests_iOS" */;
+			buildPhases = (
+				6EDD3AD420BF247500C33877 /* [CP] Check Pods Manifest.lock */,
+				6EDD3AD520BF247500C33877 /* Sources */,
+				6EDD3B4520BF247500C33877 /* Frameworks */,
+				6EDD3B4A20BF247500C33877 /* Resources */,
+				6EDD3B5720BF247500C33877 /* [CP] Embed Pods Frameworks */,
+				E3B8CDD068DA992B3A113704 /* [CP] Copy Pods Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				6EDD3AD220BF247500C33877 /* PBXTargetDependency */,
+			);
+			name = Firestore_FuzzTests_iOS;
+			productName = FirestoreTests;
+			productReference = 6EDD3B5B20BF247500C33877 /* Firestore_FuzzTests_iOS.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 		DE03B2941F2149D600A30B9C /* Firestore_IntegrationTests_iOS */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = DE03B2E61F2149D600A30B9C /* Build configuration list for PBXNativeTarget "Firestore_IntegrationTests_iOS" */;
@@ -1267,6 +1337,9 @@
 						DevelopmentTeam = EQHXZ8M8AV;
 						TestTargetID = 6003F589195388D20070C39A;
 					};
+					6EDD3AD120BF247500C33877 = {
+						DevelopmentTeam = EQHXZ8M8AV;
+					};
 					DE03B2941F2149D600A30B9C = {
 						DevelopmentTeam = EQHXZ8M8AV;
 					};
@@ -1300,6 +1373,7 @@
 				DE03B2941F2149D600A30B9C /* Firestore_IntegrationTests_iOS */,
 				DE29E7F51F2174B000909613 /* AllTests_iOS */,
 				DE0761E31F2FE611003233AF /* SwiftBuildTest */,
+				6EDD3AD120BF247500C33877 /* Firestore_FuzzTests_iOS */,
 			);
 		};
 /* End PBXProject section */
@@ -1342,6 +1416,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		6EDD3B4A20BF247500C33877 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		DE03B2D81F2149D600A30B9C /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -1490,6 +1571,42 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
+		6EDD3AD420BF247500C33877 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Firestore_FuzzTests_iOS-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		6EDD3B5720BF247500C33877 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+				"${SRCROOT}/Pods/Target Support Files/Pods-Firestore_FuzzTests_iOS/Pods-Firestore_FuzzTests_iOS-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/LibFuzzer/LibFuzzer.framework",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/LibFuzzer.framework",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Firestore_FuzzTests_iOS/Pods-Firestore_FuzzTests_iOS-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		761F9C177D75EA79C6C89187 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -1625,6 +1742,21 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
+		E3B8CDD068DA992B3A113704 /* [CP] Copy Pods Resources */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Copy Pods Resources";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Firestore_FuzzTests_iOS/Pods-Firestore_FuzzTests_iOS-resources.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		E7A967D34B382BF27EF0E619 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -1814,6 +1946,7 @@
 				618BBEB120B89AAC00B5BCE7 /* status.pb.cc in Sources */,
 				54A0352F20A3B3D8003E0143 /* status_test.cc in Sources */,
 				54A0353020A3B3D8003E0143 /* statusor_test.cc in Sources */,
+				0535C1B65DADAE1CE47FA3CA /* string_format_apple_test.mm in Sources */,
 				54131E9720ADE679001DF3FF /* string_format_test.cc in Sources */,
 				AB380CFE201A2F4500D97691 /* string_util_test.cc in Sources */,
 				618BBEA620B89AAC00B5BCE7 /* target.pb.cc in Sources */,
@@ -1823,11 +1956,20 @@
 				ABC1D7E12023A40C00BA84F0 /* token_test.cc in Sources */,
 				54A0352720A3AED0003E0143 /* transform_operations_test.mm in Sources */,
 				549CCA5120A36DBC00BCEB75 /* tree_sorted_map_test.cc in Sources */,
+				C80B10E79CDD7EF7843C321E /* type_traits_apple_test.mm in Sources */,
 				ABC1D7DE2023A05300BA84F0 /* user_test.cc in Sources */,
 				618BBEAD20B89AAC00B5BCE7 /* write.pb.cc in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		6EDD3AD520BF247500C33877 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				6EDD3B6020BF25AE00C33877 /* FSTFuzzTestsPrincipal.mm in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		DE03B2981F2149D600A30B9C /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -1880,6 +2022,11 @@
 			target = 6003F589195388D20070C39A /* Firestore_Example_iOS */;
 			targetProxy = 6003F5B3195388D20070C39A /* PBXContainerItemProxy */;
 		};
+		6EDD3AD220BF247500C33877 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 6003F589195388D20070C39A /* Firestore_Example_iOS */;
+			targetProxy = 6EDD3AD320BF247500C33877 /* PBXContainerItemProxy */;
+		};
 		DE03B2951F2149D600A30B9C /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 6003F589195388D20070C39A /* Firestore_Example_iOS */;
@@ -2044,6 +2191,7 @@
 				HEADER_SEARCH_PATHS = "";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				ONLY_ACTIVE_ARCH = YES;
+				OTHER_CFLAGS = "";
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
@@ -2077,6 +2225,7 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = "";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				OTHER_CFLAGS = "";
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
@@ -2160,6 +2309,54 @@
 					"\"${PODS_ROOT}/ProtobufCpp/src\"",
 				);
 				INFOPLIST_FILE = "Tests/Tests-Info.plist";
+				OTHER_CFLAGS = (
+					"$(inherited)",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GoogleTest/GoogleTest.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/OCMock/OCMock.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/ProtobufCpp/ProtobufCpp.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/leveldb-library/leveldb.framework/Headers\"",
+					"$(inherited)",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/BoringSSL/openssl.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseAuth/FirebaseAuth.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseCore/FirebaseCore.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseFirestore/FirebaseFirestore.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GTMSessionFetcher/GTMSessionFetcher.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/Protobuf/Protobuf.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-Core/grpc.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-ProtoRPC/ProtoRPC.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-RxLibrary/RxLibrary.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC/GRPCClient.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/leveldb-library/leveldb.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/nanopb/nanopb.framework/Headers\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/Firebase\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/FirebaseAnalytics\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/FirebaseInstanceID\"",
+					"-DPB_FIELD_32BIT",
+					"-DPB_NO_PACKED_STRUCTS=1",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SYSTEM_HEADER_SEARCH_PATHS = "\"${PODS_ROOT}/nanopb\"";
@@ -2197,6 +2394,54 @@
 					"\"${PODS_ROOT}/ProtobufCpp/src\"",
 				);
 				INFOPLIST_FILE = "Tests/Tests-Info.plist";
+				OTHER_CFLAGS = (
+					"$(inherited)",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GoogleTest/GoogleTest.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/OCMock/OCMock.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/ProtobufCpp/ProtobufCpp.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/leveldb-library/leveldb.framework/Headers\"",
+					"$(inherited)",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/BoringSSL/openssl.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseAuth/FirebaseAuth.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseCore/FirebaseCore.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/FirebaseFirestore/FirebaseFirestore.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GTMSessionFetcher/GTMSessionFetcher.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/Protobuf/Protobuf.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-Core/grpc.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-ProtoRPC/ProtoRPC.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC-RxLibrary/RxLibrary.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/gRPC/GRPCClient.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/leveldb-library/leveldb.framework/Headers\"",
+					"-iquote",
+					"\"${PODS_CONFIGURATION_BUILD_DIR}/nanopb/nanopb.framework/Headers\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/Firebase\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/FirebaseAnalytics\"",
+					"-isystem",
+					"\"${PODS_ROOT}/Headers/Public/FirebaseInstanceID\"",
+					"-DPB_FIELD_32BIT",
+					"-DPB_NO_PACKED_STRUCTS=1",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SYSTEM_HEADER_SEARCH_PATHS = "\"${PODS_ROOT}/nanopb\"";
@@ -2205,6 +2450,66 @@
 			};
 			name = Release;
 		};
+		6EDD3B5920BF247500C33877 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 84434E57CA72951015FC71BC /* Pods-Firestore_FuzzTests_iOS.debug.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				DEVELOPMENT_TEAM = EQHXZ8M8AV;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(SDKROOT)/Developer/Library/Frameworks",
+					"$(inherited)",
+					"$(DEVELOPER_FRAMEWORKS_DIR)",
+				);
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"$(inherited)",
+					"COCOAPODS=1",
+					"GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS=1",
+				);
+				INFOPLIST_FILE = "FuzzTests/Firestore_FuzzTests_iOS-Info.plist";
+				OTHER_CFLAGS = (
+					"$(inherited)",
+					"-fsanitize-coverage=trace-pc-guard",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.${PRODUCT_NAME:rfc1034identifier}";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Firestore_Example_iOS.app/Firestore_Example_iOS";
+				WRAPPER_EXTENSION = xctest;
+			};
+			name = Debug;
+		};
+		6EDD3B5A20BF247500C33877 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 97C492D2524E92927C11F425 /* Pods-Firestore_FuzzTests_iOS.release.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				DEVELOPMENT_TEAM = EQHXZ8M8AV;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(SDKROOT)/Developer/Library/Frameworks",
+					"$(inherited)",
+					"$(DEVELOPER_FRAMEWORKS_DIR)",
+				);
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"$(inherited)",
+					"COCOAPODS=1",
+					"GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS=1",
+				);
+				INFOPLIST_FILE = "FuzzTests/Firestore_FuzzTests_iOS-Info.plist";
+				OTHER_CFLAGS = (
+					"$(inherited)",
+					"-fsanitize-coverage=trace-pc-guard",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.${PRODUCT_NAME:rfc1034identifier}";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Firestore_Example_iOS.app/Firestore_Example_iOS";
+				WRAPPER_EXTENSION = xctest;
+			};
+			name = Release;
+		};
 		DE03B2E71F2149D600A30B9C /* Debug */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 1277F98C20D2DF0867496976 /* Pods-Firestore_IntegrationTests_iOS.debug.xcconfig */;
@@ -2388,6 +2693,15 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		6EDD3B5820BF247500C33877 /* Build configuration list for PBXNativeTarget "Firestore_FuzzTests_iOS" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				6EDD3B5920BF247500C33877 /* Debug */,
+				6EDD3B5A20BF247500C33877 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		DE03B2E61F2149D600A30B9C /* Build configuration list for PBXNativeTarget "Firestore_IntegrationTests_iOS" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
diff --git a/Firestore/Example/Firestore.xcodeproj/xcshareddata/xcschemes/Firestore_FuzzTests_iOS.xcscheme b/Firestore/Example/Firestore.xcodeproj/xcshareddata/xcschemes/Firestore_FuzzTests_iOS.xcscheme
new file mode 100644
index 0000000..039273b
--- /dev/null
+++ b/Firestore/Example/Firestore.xcodeproj/xcshareddata/xcschemes/Firestore_FuzzTests_iOS.xcscheme
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0930"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      enableAddressSanitizer = "YES"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "6EDD3AD120BF247500C33877"
+               BuildableName = "Firestore_FuzzTests_iOS.xctest"
+               BlueprintName = "Firestore_FuzzTests_iOS"
+               ReferencedContainer = "container:Firestore.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/Firestore/Example/FuzzTests/FSTFuzzTestsPrincipal.mm b/Firestore/Example/FuzzTests/FSTFuzzTestsPrincipal.mm
new file mode 100644
index 0000000..63f6db0
--- /dev/null
+++ b/Firestore/Example/FuzzTests/FSTFuzzTestsPrincipal.mm
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2018 Google
+ *
+ * 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 <Foundation/NSObject.h>
+
+#include "LibFuzzer/FuzzerDefs.h"
+
+namespace {
+
+// Contains the code to be fuzzed. Called by the fuzzing library with
+// different argument values for `data` and `size`.
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  // Code to be fuzz-tested here.
+  return 0;
+}
+
+// Simulates calling the main() function of libFuzzer (FuzzerMain.cpp).
+int RunFuzzTestingMain() {
+  // Arguments to libFuzzer main() function should be added to this array,
+  // e.g., dictionaries, corpus, number of runs, jobs, etc.
+  char *program_args[] = {
+      const_cast<char *>("RunFuzzTestingMain")  // First argument is program name.
+  };
+  char **argv = program_args;
+  int argc = sizeof(program_args) / sizeof(program_args[0]);
+
+  // Start fuzzing using libFuzzer's driver.
+  return fuzzer::FuzzerDriver(&argc, &argv, LLVMFuzzerTestOneInput);
+}
+
+}  // namespace
+
+/**
+ * This class is registered as the NSPrincipalClass in the
+ * Firestore_FuzzTests_iOS bundle's Info.plist. XCTest instantiates this class
+ * to perform one-time setup for the test bundle, as documented here:
+ *
+ *   https://developer.apple.com/documentation/xctest/xctestobservationcenter
+ */
+@interface FSTFuzzTestsPrincipal : NSObject
+@end
+
+@implementation FSTFuzzTestsPrincipal
+
+- (instancetype)init {
+  self = [super init];
+  RunFuzzTestingMain();
+  return self;
+}
+
+@end
diff --git a/Firestore/Example/FuzzTests/Firestore_FuzzTests_iOS-Info.plist b/Firestore/Example/FuzzTests/Firestore_FuzzTests_iOS-Info.plist
new file mode 100644
index 0000000..0d53e5f
--- /dev/null
+++ b/Firestore/Example/FuzzTests/Firestore_FuzzTests_iOS-Info.plist
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>NSPrincipalClass</key>
+	<string>FSTFuzzTestsPrincipal</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>
diff --git a/Firestore/Example/LibFuzzer.podspec b/Firestore/Example/LibFuzzer.podspec
new file mode 100644
index 0000000..0f677f5
--- /dev/null
+++ b/Firestore/Example/LibFuzzer.podspec
@@ -0,0 +1,45 @@
+# Copyright 2018 Google
+#
+# 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.
+
+# A podspec for libFuzzer. Excludes the 'FuzzerMain.cpp' because the pod
+# installation would require the 'LLVMFuzzerTestOneInput' function to be
+# linked when the pod is being created, but it will be available in
+# the fuzzing application. Hence, users of this Pod are required to
+# provide their main function similar to 'FuzzerMain.cpp'.
+# See the build script of libFuzzer for more details:
+# https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer/build.sh
+
+Pod::Spec.new do |s|
+  s.name                = 'LibFuzzer'
+  s.version             = '1.0'
+  s.summary             = 'libFuzzer for fuzz testing'
+  s.homepage            = 'https://llvm.org/docs/LibFuzzer.html'
+  s.license             = { :type => 'BSD-Like' }
+  s.authors             = 'LLVM Team'
+
+  # Check out only libFuzzer folder.
+  s.source              = {
+    :svn => 'https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer'
+  }
+
+  # Add all source files, except for the FuzzerMain.cpp.
+  s.source_files        = '*.{h,cpp,def}'
+  s.exclude_files       = 'FuzzerMain.cpp'
+
+  s.library             = 'c++'
+
+  s.pod_target_xcconfig = {
+    'CLANG_CXX_LANGUAGE_STANDARD' => 'c++11'
+  }
+end
diff --git a/Firestore/Example/Podfile b/Firestore/Example/Podfile
index a98ae20..2241582 100644
--- a/Firestore/Example/Podfile
+++ b/Firestore/Example/Podfile
@@ -10,7 +10,7 @@ target 'Firestore_Example_iOS' do
   # The next line is the forcing function for the Firebase pod. The Firebase
   # version's subspecs should depend on the component versions in their
   # corresponding podspec's.
-  pod 'Firebase/Core', '5.0.1'
+  pod 'Firebase/Core', '5.1.0'
 
   pod 'FirebaseAuth', :path => '../../'
   pod 'FirebaseCore', :path => '../../'
@@ -38,4 +38,10 @@ target 'Firestore_Example_iOS' do
   target 'SwiftBuildTest' do
     platform :ios, '8.0'
   end
+
+  target 'Firestore_FuzzTests_iOS' do
+    inherit! :search_paths
+
+    pod 'LibFuzzer', :podspec => 'LibFuzzer.podspec'
+  end
 end