Merge pull request #147 from DataDog/ncreated/RUMM-486-run-tests-on-a…

…ll-supported-iOS-versions RUMM-486 Fix span encoding error on iOS versions prior to 13.0
DataDog · Jun 19, 2020 · 3eb6de6 · 3eb6de6
2 parents eb65038 + b20842c
commit 3eb6de6
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Showing 8 changed files with 114 additions and 45 deletions.
diff --git a/Datadog/Datadog.xcodeproj/project.pbxproj b/Datadog/Datadog.xcodeproj/project.pbxproj
@@ -157,6 +157,7 @@
 		61E917D12465423600E6C631 /* DDTracerConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61E917D02465423600E6C631 /* DDTracerConfiguration.swift */; };
 		61E917D3246546BF00E6C631 /* DDTracerConfigurationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61E917D2246546BF00E6C631 /* DDTracerConfigurationTests.swift */; };
 		61F1A61A2498A51700075390 /* CoreMocks.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61F1A6192498A51700075390 /* CoreMocks.swift */; };
+		61F1A623249B811200075390 /* Encoding.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61F1A622249B811200075390 /* Encoding.swift */; };
 		61F8CC092469295500FE2908 /* DatadogConfigurationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61F8CC082469295500FE2908 /* DatadogConfigurationTests.swift */; };
 		61FB222D244A21ED00902D19 /* LoggingFeatureMocks.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61FB222C244A21ED00902D19 /* LoggingFeatureMocks.swift */; };
 		61FB2230244E1BE900902D19 /* LoggingFeatureTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 61FB222F244E1BE900902D19 /* LoggingFeatureTests.swift */; };
@@ -386,6 +387,7 @@
 		61E917D02465423600E6C631 /* DDTracerConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DDTracerConfiguration.swift; sourceTree = "<group>"; };
 		61E917D2246546BF00E6C631 /* DDTracerConfigurationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DDTracerConfigurationTests.swift; sourceTree = "<group>"; };
 		61F1A6192498A51700075390 /* CoreMocks.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CoreMocks.swift; sourceTree = "<group>"; };
+		61F1A622249B811200075390 /* Encoding.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Encoding.swift; sourceTree = "<group>"; };
 		61F8CC082469295500FE2908 /* DatadogConfigurationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DatadogConfigurationTests.swift; sourceTree = "<group>"; };
 		61FB222C244A21ED00902D19 /* LoggingFeatureMocks.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoggingFeatureMocks.swift; sourceTree = "<group>"; };
 		61FB222F244E1BE900902D19 /* LoggingFeatureTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoggingFeatureTests.swift; sourceTree = "<group>"; };
@@ -853,6 +855,7 @@
 				61133C452423990D00786299 /* SwiftExtensions.swift */,
 				61133C462423990D00786299 /* TestsDirectory.swift */,
 				61133C472423990D00786299 /* DatadogExtensions.swift */,
+				61F1A622249B811200075390 /* Encoding.swift */,
 			);
 			path = Helpers;
 			sourceTree = "<group>";
@@ -1573,6 +1576,7 @@
 				9E36D92224373EA700BFBDB7 /* SwiftExtensionsTests.swift in Sources */,
 				61133C652423990D00786299 /* LogBuilderTests.swift in Sources */,
 				61F8CC092469295500FE2908 /* DatadogConfigurationTests.swift in Sources */,
+				61F1A623249B811200075390 /* Encoding.swift in Sources */,
 				61133C642423990D00786299 /* LoggerTests.swift in Sources */,
 				61E45BE5245196EA00F2C652 /* SpanFileOutputTests.swift in Sources */,
 				61133C4E2423990D00786299 /* UIKitMocks.swift in Sources */,

diff --git a/Datadog/Datadog.xcodeproj/xcshareddata/xcschemes/Datadog.xcscheme b/Datadog/Datadog.xcodeproj/xcshareddata/xcschemes/Datadog.xcscheme
@@ -63,6 +63,17 @@
                BlueprintName = "DatadogTests"
                ReferencedContainer = "container:Datadog.xcodeproj">
             </BuildableReference>
+            <SkippedTests>
+               <Test
+                  Identifier = "URLSessionSwizzlerTests/test_dataTask_urlCompletion_alwaysIntercept()">
+               </Test>
+               <Test
+                  Identifier = "URLSessionSwizzlerTests_CustomDelegate/test_dataTask_urlCompletion_alwaysIntercept()">
+               </Test>
+               <Test
+                  Identifier = "URLSessionSwizzlerTests_DefaultConfig/test_dataTask_urlCompletion_alwaysIntercept()">
+               </Test>
+            </SkippedTests>
          </TestableReference>
       </Testables>
    </TestAction>

diff --git a/Sources/Datadog/Core/Utils/EncodableValue.swift b/Sources/Datadog/Core/Utils/EncodableValue.swift
@@ -61,7 +61,33 @@ internal struct JSONStringEncodableValue: Encodable {
             // Switch to encode `url.absoluteString` directly - see the comment in `EncodableValue`
             try urlValue.absoluteString.encode(to: encoder)
         } else {
-            let jsonData = try jsonEncoder.encode(encodable)
+            let jsonData: Data
+
+            if #available(iOS 13.0, *) {
+                jsonData = try jsonEncoder.encode(encodable)
+            } else {
+                // Prior to `iOS13.0` the `JSONEncoder` is unable to encode primitive values - it expects them to be
+                // wrapped inside top-level JSON object (array or dictionary). Reference: https://bugs.swift.org/browse/SR-6163
+                //
+                // As a workaround, we serialize the `encodable` as a JSON array and then remove `[` and `]` bytes from serialized data.
+                let temporaryJsonArrayData = try jsonEncoder.encode([encodable])
+
+                let subdataStartIndex = temporaryJsonArrayData.startIndex.advanced(by: 1)
+                let subdataEndIndex = temporaryJsonArrayData.endIndex.advanced(by: -1)
+
+                guard subdataStartIndex < subdataEndIndex else {
+                    // This error should never be thrown, as the `temporaryJsonArrayData` will always contain at
+                    // least two bytes standing for `[` and `]`. This check is just for sanity.
+                    let encodingContext = EncodingError.Context(
+                        codingPath: encoder.codingPath,
+                        debugDescription: "Cannot safely encode value within a temporary array container."
+                    )
+                    throw EncodingError.invalidValue(encodable.value, encodingContext)
+                }
+
+                jsonData = temporaryJsonArrayData.subdata(in: subdataStartIndex..<subdataEndIndex)
+            }
+
             if let stringValue = String(data: jsonData, encoding: .utf8) {
                 try stringValue.encode(to: encoder)
             }

diff --git a/Tests/DatadogIntegrationTests/TracingIntegrationTests.swift b/Tests/DatadogIntegrationTests/TracingIntegrationTests.swift
@@ -93,15 +93,18 @@ class TracingIntegrationTests: IntegrationTests {
                 )
             )
 
-            try matcher.meta.networkAvailableInterfaces().split(separator: "+").forEach { interface in
-                XCTAssertTrue(
-                    SpanMatcher.allowedNetworkAvailableInterfacesValues.contains(String(interface))
-                )
+            if #available(iOS 12.0, *) { // The `iOS11NetworkConnectionInfoProvider` doesn't provide those info
+                try matcher.meta.networkAvailableInterfaces().split(separator: "+").forEach { interface in
+                    XCTAssertTrue(
+                        SpanMatcher.allowedNetworkAvailableInterfacesValues.contains(String(interface))
+                    )
+                }
+
+                XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionSupportsIPv4()))
+                XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionSupportsIPv6()))
+                XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionIsExpensive()))
             }
 
-            XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionSupportsIPv4()))
-            XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionSupportsIPv6()))
-            XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionIsExpensive()))
             if #available(iOS 13.0, *) {
                 XCTAssertTrue(["0", "1"].contains(try matcher.meta.networkConnectionIsConstrained()))
             }

diff --git a/Tests/DatadogTests/Datadog/Core/Utils/EncodableValueTests.swift b/Tests/DatadogTests/Datadog/Core/Utils/EncodableValueTests.swift
@@ -12,20 +12,22 @@ class EncodableValueTests: XCTestCase {
         let encoder = JSONEncoder()
 
         XCTAssertEqual(
-            try encoder.encode(EncodableValue("string")).utf8String,
-            #""string""#
+            try encoder.encode(EncodingContainer(EncodableValue("string"))).utf8String,
+            #"{"value":"string"}"#
         )
         XCTAssertEqual(
-            try encoder.encode(EncodableValue(123)).utf8String,
-            #"123"#
+            try encoder.encode(EncodingContainer(EncodableValue(123))).utf8String,
+            #"{"value":123}"#
         )
         XCTAssertEqual(
             try encoder.encode(EncodableValue(["a", "b", "c"])).utf8String,
             #"["a","b","c"]"#
         )
         XCTAssertEqual(
-            try encoder.encode(EncodableValue(URL(string: "https://example.com/image.png")!)).utf8String,
-            #""https:\/\/example.com\/image.png""#
+            try encoder.encode(
+                EncodingContainer(EncodableValue(URL(string: "https://example.com/image.png")!))
+            ).utf8String,
+            #"{"value":"https:\/\/example.com\/image.png"}"#
         )
         struct Foo: Encodable {
             let bar = "bar_"
@@ -43,30 +45,40 @@ class JSONStringEncodableValueTests: XCTestCase {
         let encoder = JSONEncoder()
 
         XCTAssertEqual(
-            try encoder.encode(JSONStringEncodableValue("string", encodedUsing: JSONEncoder())).utf8String,
-            #""string""#
+            try encoder.encode(
+                EncodingContainer(JSONStringEncodableValue("string", encodedUsing: JSONEncoder()))
+            ).utf8String,
+            #"{"value":"string"}"#
         )
         XCTAssertEqual(
-            try encoder.encode(JSONStringEncodableValue(123, encodedUsing: JSONEncoder())).utf8String,
-            #""123""#
+            try encoder.encode(
+                EncodingContainer(JSONStringEncodableValue(123, encodedUsing: JSONEncoder()))
+            ).utf8String,
+            #"{"value":"123"}"#
         )
         XCTAssertEqual(
-            try encoder.encode(JSONStringEncodableValue(["a", "b", "c"], encodedUsing: JSONEncoder())).utf8String,
-            #""[\"a\",\"b\",\"c\"]""#
+            try encoder.encode(
+                EncodingContainer(JSONStringEncodableValue(["a", "b", "c"], encodedUsing: JSONEncoder()))
+            ).utf8String,
+            #"{"value":"[\"a\",\"b\",\"c\"]"}"#
         )
         XCTAssertEqual(
             try encoder.encode(
-                JSONStringEncodableValue(URL(string: "https://example.com/image.png")!, encodedUsing: JSONEncoder())
+                EncodingContainer(
+                    JSONStringEncodableValue(URL(string: "https://example.com/image.png")!, encodedUsing: JSONEncoder())
+                )
             ).utf8String,
-            #""https:\/\/example.com\/image.png""#
+            #"{"value":"https:\/\/example.com\/image.png"}"#
         )
         struct Foo: Encodable {
             let bar = "bar_"
             let bizz = "bizz_"
         }
         XCTAssertEqual(
-            try encoder.encode(JSONStringEncodableValue(Foo(), encodedUsing: JSONEncoder())).utf8String,
-            #""{\"bar\":\"bar_\",\"bizz\":\"bizz_\"}""#
+            try encoder.encode(
+                EncodingContainer(JSONStringEncodableValue(Foo(), encodedUsing: JSONEncoder()))
+            ).utf8String,
+            #"{"value":"{\"bar\":\"bar_\",\"bizz\":\"bizz_\"}"}"#
         )
     }
 

diff --git a/Tests/DatadogTests/Datadog/Core/Utils/JSONEncoderTests.swift b/Tests/DatadogTests/Datadog/Core/Utils/JSONEncoderTests.swift
@@ -11,28 +11,22 @@ class JSONEncoderTests: XCTestCase {
     private let jsonEncoder = JSONEncoder.default()
 
     func testDateEncoding() throws {
-        /// Prior to `iOS13.0` `JSONEncoder` supports only object or array as the root type, hence we can't encode `Date` directly.
-        struct Container: Encodable {
-            let date: Date = .mockDecember15th2019At10AMUTC(addingTimeInterval: 0.123)
-        }
-
-        let encodedDate = try jsonEncoder.encode(Container())
+        let encodedDate = try jsonEncoder.encode(
+            EncodingContainer(Date.mockDecember15th2019At10AMUTC(addingTimeInterval: 0.123))
+        )
 
-        XCTAssertEqual(encodedDate.utf8String, #"{"date":"2019-12-15T10:00:00.123Z"}"#)
+        XCTAssertEqual(encodedDate.utf8String, #"{"value":"2019-12-15T10:00:00.123Z"}"#)
     }
 
     func testURLEncoding() throws {
-        /// Prior to `iOS13.0` `JSONEncoder` supports only object or array as the root type, hence we can't encode `URL` directly.
-        struct Container: Encodable {
-            let url = URL(string: "https://example.com/foo")!
-        }
-
-        let encodedURL = try jsonEncoder.encode(Container())
+        let encodedURL = try jsonEncoder.encode(
+            EncodingContainer(URL(string: "https://example.com/foo")!)
+        )
 
         if #available(iOS 13.0, OSX 10.15, *) {
-            XCTAssertEqual(encodedURL.utf8String, #"{"url":"https://example.com/foo"}"#)
+            XCTAssertEqual(encodedURL.utf8String, #"{"value":"https://example.com/foo"}"#)
         } else {
-            XCTAssertEqual(encodedURL.utf8String, #"{"url":"https:\/\/example.com\/foo"}"#)
+            XCTAssertEqual(encodedURL.utf8String, #"{"value":"https:\/\/example.com\/foo"}"#)
         }
     }
 }
diff --git a/Tests/DatadogTests/Helpers/DatadogExtensions.swift b/Tests/DatadogTests/Helpers/DatadogExtensions.swift
@@ -19,12 +19,6 @@ extension Date {
     }
 }
 
-extension EncodableValue: Equatable {
-    public static func == (lhs: EncodableValue, rhs: EncodableValue) -> Bool {
-        return String(describing: lhs) == String(describing: rhs)
-    }
-}
-
 extension File {
     func makeReadonly() throws {
         try FileManager.default.setAttributes([.immutable: true], ofItemAtPath: url.path)

diff --git a/Tests/DatadogTests/Helpers/Encoding.swift b/Tests/DatadogTests/Helpers/Encoding.swift
@@ -0,0 +1,25 @@
+/*
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/).
+ * Copyright 2019-2020 Datadog, Inc.
+ */
+
+@testable import Datadog
+
+extension EncodableValue: Equatable {
+    public static func == (lhs: EncodableValue, rhs: EncodableValue) -> Bool {
+        return String(describing: lhs) == String(describing: rhs)
+    }
+}
+
+/// Prior to `iOS13.0`, the `JSONEncoder` supports only object or array as the root type.
+/// Hence we can't test encoding `Encodable` values directly and we need as support of this `EncodingContainer` container.
+///
+/// Reference: https://bugs.swift.org/browse/SR-6163
+struct EncodingContainer<Value: Encodable>: Encodable {
+    let value: Value
+
+    init(_ value: Value) {
+        self.value = value
+    }
+}