Adding functions for tidepool study

Author: miriamkw

Package.swift

@@ -5,6 +5,7 @@ import PackageDescription
 
 let package = Package(
     name: "LoopAlgorithmToPython",
+    defaultLocalization: "no",
     platforms: [
         .macOS(.v13),
         .iOS(.v15),
@@ -30,6 +31,9 @@ let package = Package(
         ),
         .testTarget(
             name: "LoopAlgorithmToPythonTests",
-            dependencies: ["LoopAlgorithmToPython"]),
+            dependencies: ["LoopAlgorithmToPython"],
+            resources: [
+                .process("TestData")
+        ])
     ]
 )

Sources/LoopAlgorithmToPython/BundleFinder.swift

@@ -0,0 +1,50 @@
+import class Foundation.Bundle
+import class Foundation.ProcessInfo
+import struct Foundation.URL
+
+private class BundleFinder {}
+
+extension Foundation.Bundle {
+    /// Returns the resource bundle associated with the current Swift module.
+    static let module: Bundle = {
+        let bundleName = "LoopAlgorithmToPython_LoopAlgorithmToPythonTests"
+        
+        let overrides: [URL]
+        #if DEBUG
+        // The 'PACKAGE_RESOURCE_BUNDLE_PATH' name is preferred since the expected value is a path. The
+        // check for 'PACKAGE_RESOURCE_BUNDLE_URL' will be removed when all clients have switched over.
+        // This removal is tracked by rdar://107766372.
+        if let override = ProcessInfo.processInfo.environment["PACKAGE_RESOURCE_BUNDLE_PATH"]
+                       ?? ProcessInfo.processInfo.environment["PACKAGE_RESOURCE_BUNDLE_URL"] {
+            overrides = [URL(fileURLWithPath: override)]
+        } else {
+            overrides = []
+        }
+        #else
+        overrides = []
+        #endif
+        
+        print("BUNDLEFILE")
+
+        let candidates = overrides + [
+            // Bundle should be present here when the package is linked into an App.
+            Bundle.main.resourceURL,
+
+            // Bundle should be present here when the package is linked into a framework.
+            Bundle(for: BundleFinder.self).resourceURL,
+
+            // For command-line tools.
+            Bundle.main.bundleURL,
+        ]
+
+        for candidate in candidates {
+            let bundlePath = candidate?.appendingPathComponent(bundleName + ".bundle")
+            print(bundlePath)
+            if let bundle = bundlePath.flatMap(Bundle.init(url:)) {
+                print("BUNDLE:", bundle)
+                return bundle
+            }
+        }
+        fatalError("unable to find bundle named LoopAlgorithmToPython_LoopAlgorithmToPythonTests")
+    }()
+}