1 files changed, 47 insertions, 0 deletions
diff --git a/platform/darwin/test/MGLSDKTestHelpers.swift b/platform/darwin/test/MGLSDKTestHelpers.swift
new file mode 100644
index 0000000000..82b5caa273
--- /dev/null
+++ b/platform/darwin/test/MGLSDKTestHelpers.swift
@@ -0,0 +1,47 @@
+import Foundation
+
+class MGLSDKTestHelpers {
+
+    class func checkTestsContainAllMethods(testClass: Swift.AnyClass, in p: Protocol) {
+        let testMethods = self.classMethodDescriptions(testClass)
+        let subjectMethods = self.protocolMethodDescriptions(p)
+
+        for method in subjectMethods {
+            if !testMethods.contains(method) {
+                XCTFail("\(String(describing: testClass)) does not contain \(method) from \(String(describing: p))")
+            }
+        }
+
+        XCTAssert(true)
+    }
+
+}
+
+extension MGLSDKTestHelpers {
+
+    class func protocolMethodDescriptions(_ p: Protocol) -> Set<String> {
+        var methods = Set<String>()
+        var methodCount = UInt32()
+        let methodDescriptionList: UnsafeMutablePointer<objc_method_description>! = protocol_copyMethodDescriptionList(p, false, true, &methodCount)
+        for i in 0..<Int(methodCount) {
+            let description: objc_method_description = methodDescriptionList[i]
+            methods.insert(description.name.description)
+        }
+        free(methodDescriptionList)
+        return methods
+    }
+
+    class func classMethodDescriptions(_ cls: Swift.AnyClass) -> Set<String> {
+        var methods = Set<String>()
+        var methodCount = UInt32()
+        let methodList: UnsafeMutablePointer<Method?>! = class_copyMethodList(cls, &methodCount)
+        for i in 0..<Int(methodCount) {
+            let method = methodList[i]
+            let selector : Selector = method_getName(method)
+            methods.insert(selector.description)
+        }
+        free(methodList)
+        return methods
+    }
+
+}