Convert SatsPrice to a Skip multiplatform app

Tests/SatsPriceTests/XCSkipTests.swift

@@ -0,0 +1,32 @@
+// This is free software: you can redistribute and/or modify it
+// under the terms of the GNU General Public License 3.0
+// as published by the Free Software Foundation https://fsf.org
+
+import Foundation
+#if os(macOS) // Skip transpiled tests only run on macOS targets
+import SkipTest
+
+/// This test case will run the transpiled tests for the Skip module.
+@available(macOS 13, macCatalyst 16, *)
+final class XCSkipTests: XCTestCase, XCGradleHarness {
+    public func testSkipModule() async throws {
+        // Run the transpiled JUnit tests for the current test module.
+        // These tests will be executed locally using Robolectric.
+        // Connected device or emulator tests can be run by setting the
+        // `ANDROID_SERIAL` environment variable to an `adb devices`
+        // ID in the scheme's Run settings.
+        //
+        // Note that it isn't currently possible to filter the tests to run.
+        try await runGradleTests()
+    }
+}
+#endif
+
+/// True when running in a transpiled Java runtime environment
+let isJava = ProcessInfo.processInfo.environment["java.io.tmpdir"] != nil
+/// True when running within an Android environment (either an emulator or device)
+let isAndroid = isJava && ProcessInfo.processInfo.environment["ANDROID_ROOT"] != nil
+/// True is the transpiled code is currently running in the local Robolectric test environment
+let isRobolectric = isJava && !isAndroid
+/// True if the system's `Int` type is 32-bit.
+let is32BitInteger = Int64(Int.max) == Int64(Int32.max)