Init

.gitignore

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+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

Package.swift

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+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "USDA",
+    products: [
+        // Products define the executables and libraries a package produces, making them visible to other packages.
+        .library(
+            name: "USDA",
+            targets: ["USDA"]),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package, defining a module or a test suite.
+        // Targets can depend on other targets in this package and products from dependencies.
+        .target(
+            name: "USDA"),
+        .testTarget(
+            name: "USDATests",
+            dependencies: ["USDA"]),
+    ]
+)

Sources/USDA/USDA.swift

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+// The Swift Programming Language
+// https://docs.swift.org/swift-book
+
+final class USDAClient {
+        
+}

Tests/USDATests/USDATests.swift

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+import XCTest
+@testable import USDA
+
+final class USDATests: XCTestCase {
+    func testExample() throws {
+        // XCTest Documentation
+        // https://developer.apple.com/documentation/xctest
+
+        // Defining Test Cases and Test Methods
+        // https://developer.apple.com/documentation/xctest/defining_test_cases_and_test_methods
+    }
+}