Add test, .vscode/settings.json, license headers

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+  "licenser.author": "CoreOffice contributors",
+  "editor.tabSize": 2,
+  "editor.detectIndentation": false,
+  "editor.formatOnSave": true
+}

Package.resolved

@@ -18,6 +18,15 @@
           "revision": "d67ac68d09a95443303e9d6e37b34e7ba101d5f1",
           "version": "1.0.1"
         }
+      },
+      {
+        "package": "ZIPFoundation",
+        "repositoryURL": "https://github.com/weichsel/ZIPFoundation.git",
+        "state": {
+          "branch": null,
+          "revision": "ec32d62d412578542c0ffb7a6ce34d3e64b43b94",
+          "version": "0.9.11"
+        }
       }
     ]
   },

Package.swift

@@ -25,13 +25,14 @@ let package = Package(
     // .package(url: /* package url */, from: "1.0.0"),
     .package(url: "https://github.com/apple/swift-crypto.git", from: "1.0.1"),
     .package(url: "https://github.com/CoreOffice/OLEKit.git", .branch("master")),
+    .package(url: "https://github.com/weichsel/ZIPFoundation.git", .upToNextMinor(from: "0.9.11")),
   ],
   targets: [
     // Targets are the basic building blocks of a package. A target can define
     // a module or a test suite.
     // Targets can depend on other targets in this package, and on products in
     // packages which this package depends on.
     .target(name: "CryptoOffice", dependencies: ["OLEKit", "Crypto"]),
-    .testTarget(name: "CryptoOfficeTests", dependencies: ["CryptoOffice"]),
+    .testTarget(name: "CryptoOfficeTests", dependencies: ["CryptoOffice", "ZIPFoundation"]),
   ]
 )

Sources/CryptoOffice/CryptoOffice.swift

@@ -1,3 +1,29 @@
-struct CryptoOffice {
-  var text = "Hello, World!"
+// Copyright 2020 CoreOffice contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Crypto
+import Foundation
+import OLEKit
+
+public final class CryptoOfficeFile {
+  private let oleFile: OLEFile
+
+  public init(path: String) throws {
+    do {
+      oleFile = try OLEFile(path)
+    } catch let OLEError.fileIsNotOLE(path) {
+      throw CryptoOfficeError.fileIsNotEncrypted(path: path)
+    }
+  }
 }

Sources/CryptoOffice/CryptoOfficeError.swift

@@ -0,0 +1,17 @@
+// Copyright 2020 CoreOffice contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+enum CryptoOfficeError: Error {
+  case fileIsNotEncrypted(path: String)
+}

Tests/CryptoOfficeTests/CryptoOfficeTests.swift

@@ -1,11 +1,26 @@
+// Copyright 2020 CoreOffice contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 @testable import CryptoOffice
 import XCTest
 
 final class CryptoOfficeTests: XCTestCase {
-  func testExample() {
-    // This is an example of a functional test case.
-    // Use XCTAssert and related functions to verify your tests produce the correct
-    // results.
-    XCTAssertEqual(CryptoOffice().text, "Hello, World!")
+  func testWorkbook() throws {
+    let url = URL(fileURLWithPath: #file)
+      .deletingLastPathComponent()
+      .appendingPathComponent("TestWorkbook.xlsx")
+
+    _ = try CryptoOfficeFile(path: url.path)
   }
 }