Unicode‐Heavy Test Fixture

Fixtures/Miscellaneous/Unicode/Package.swift

@@ -0,0 +1,44 @@
+// swift-tools-version:5.1
+
+import PackageDescription
+import Foundation
+
+/// This string demonstrates as many complications of Unicode as possible.
+let complicatedString = "πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄"
+// π U+03C0: A simple BMP scalar.
+//‎ שּׁ U+FB2C: Changes under both NFC and NFD.
+// µ U+00B5: Changes under NFKC and NFKD.
+// 𝄞 U+1D11E: Simple non‐BMP scalar.
+// 🇺🇳 U+1F1FA U+1F1F3: Multi‐scalar character.
+// 🇮🇱 U+1F1EE U+1F1F1: Second consecutive regional indicator. (Complicated grapheme breaking.)
+// x̱̱̱̱̱̄̄̄̄̄ U+0078 (U+0331 U+0304) × 5: Extremely long combining sequence. (Also reordrant under normalization.)
+
+// The following verifies that sources haven’t been normalized, which would reduce the test’s effectiveness.
+var verify = "\u{03C0}\u{0FB2C}\u{00B5}\u{1D11E}\u{1F1FA}\u{1F1F3}\u{1F1EE}\u{1F1F1}\u{0078}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}"
+assert(
+    complicatedString.unicodeScalars.elementsEqual(verify.unicodeScalars),
+    "\(complicatedString) ≠ \(verify)")
+
+let package = Package(
+    name: complicatedString,
+    products: [
+        .library(
+            name: complicatedString,
+            targets: [complicatedString]),
+        .executable(name: complicatedString + "‐tool", targets: [complicatedString + "‐tool"])
+    ],
+    dependencies: [
+        .package(url: "../UnicodeDependency‐\(complicatedString)", from: "1.0.0")
+    ],
+    targets: [
+        .target(
+            name: complicatedString,
+            dependencies: [.product(name: "UnicodeDependency‐\(complicatedString)")]),
+        .target(
+            name: complicatedString + "‐tool",
+            dependencies: [.target(name: complicatedString)]),
+        .testTarget(
+            name: complicatedString + "Tests",
+            dependencies: [.target(name: complicatedString)]),
+    ]
+)

Fixtures/Miscellaneous/Unicode/README.md

@@ -0,0 +1,5 @@
+# Unicode
+
+This fixture makes extensive use of exotic Unicode. While deliberately trying to break a as many common false assumptions as possible, *this is a valid package*, and clients are encouraged to test their functionality with it. A tool that successfully handles this package is unlikely to encounter problems with any real‐world package in any human language.
+
+The neighbouring package `UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄` must be placed next this package and tagged with version 1.0.0. (This is necessary to use Unicode in dependency URLs in this package’s manifest.)

Fixtures/Miscellaneous/Unicode/Sources/πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄/πשּׁµ𝄞🇺🇳x̱̱̱̱̱̄̄̄̄̄.swift

@@ -0,0 +1,4 @@
+public struct πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄ {
+    public init() {}
+    public var πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄ = "Hello, World!"
+}

Fixtures/Miscellaneous/Unicode/Sources/πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄‐tool/main.swift

@@ -0,0 +1,3 @@
+import π_µ_____x__________
+
+print(πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄().πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄)

Fixtures/Miscellaneous/Unicode/Tests/LinuxMain.swift

@@ -0,0 +1,8 @@
+import XCTest
+
+import π_µ_____x__________Tests
+
+var tests = [XCTestCaseEntry]()
+tests += π_µ_____x__________Tests.__allTests()
+
+XCTMain(tests)

Fixtures/Miscellaneous/Unicode/Tests/πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests/XCTestManifests.swift

@@ -0,0 +1,18 @@
+#if !canImport(ObjectiveC)
+import XCTest
+
+extension πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests {
+    // DO NOT MODIFY: This is autogenerated, use:
+    //   `swift test --generate-linuxmain`
+    // to regenerate.
+    static let __allTests__πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests = [
+        ("testπשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄", testπשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄),
+    ]
+}
+
+public func __allTests() -> [XCTestCaseEntry] {
+    return [
+        testCase(πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests.__allTests__πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests),
+    ]
+}
+#endif

Fixtures/Miscellaneous/Unicode/Tests/πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests/πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests.swift

@@ -0,0 +1,13 @@
+import XCTest
+
+// TODO: - Can imports be made less ugly? (SR‐10839)
+//@testable import πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄
+@testable import π_µ_____x__________
+// (These characters all work for identifiers. See below.)
+
+final class πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄Tests: XCTestCase {
+
+    func testπשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄() {
+        XCTAssertEqual(πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄().πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄, "Hello, World!")
+    }
+}

Fixtures/Miscellaneous/Unicode/Utilities/SomeOtherPackage/Package.swift

@@ -0,0 +1,15 @@
+// swift-tools-version:5.1
+
+import PackageDescription
+
+let package = Package(
+    name: "SomeOtherPackage",
+    dependencies: [
+        .package(path: "../../"),
+    ],
+    targets: [
+        .target(
+            name: "SomeOtherPackage",
+            dependencies: ["πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄"]),
+    ]
+)

Fixtures/Miscellaneous/Unicode/Utilities/SomeOtherPackage/README.md

@@ -0,0 +1,7 @@
+# SomeOtherPackage
+
+This nested utility package refers back to the main repository as a local dependency.
+
+If client tools accidently pick this package up as part of the main repository package, dependency resolution could become circular or otherwise problematic.
+
+(Prior to direct Xcode support for packages, this repository structure was a common way of hiding executable utilities from `generate-xcodeproj`, so that the main package would still be viable for iOS.)

Fixtures/Miscellaneous/Unicode/Utilities/SomeOtherPackage/Sources/SomeOtherPackage/main.swift

@@ -0,0 +1 @@
+print("Hello, world!")

Fixtures/Miscellaneous/UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄/Package.swift

@@ -0,0 +1,17 @@
+// swift-tools-version:5.1
+
+import PackageDescription
+
+let package = Package(
+    name: "UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄",
+    products: [
+        .library(
+            name: "UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄",
+            targets: ["UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄"]),
+    ],
+    targets: [
+        .target(
+            name: "UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄",
+            dependencies: []),
+    ]
+)

Fixtures/Miscellaneous/UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄/README.md

@@ -0,0 +1,3 @@
+# UnicodeDependency‐πשּׁµ𝄞🇺🇳x̱̱̱̱̱̄̄̄̄̄
+
+A description of this package.

Fixtures/Miscellaneous/UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄/Sources/UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄/UnicodeDependency‐πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄.swift

@@ -0,0 +1,3 @@
+struct UnicodeDependency_UnicodeDependency_πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄ {
+    var text = "Hello, World!"
+}

Tests/FunctionalTests/MiscellaneousTests.swift

@@ -16,6 +16,8 @@ import TSCUtility
 import TSCLibc
 import class Foundation.ProcessInfo
 import class Foundation.Thread
+import SourceControl
+import SPMTestSupport
 import Workspace
 
 typealias ProcessID = TSCBasic.Process.ProcessID
@@ -435,4 +437,40 @@ class MiscellaneousTestCase: XCTestCase {
         }
       #endif
     }
+
+    func testUnicode() {
+        #if !os(Linux) // TODO: - Linux has trouble with this and needs investigation.
+        fixture(name: "Miscellaneous/Unicode") { prefix in
+            // See the fixture manifest for an explanation of this string.
+            let complicatedString = "πשּׁµ𝄞🇺🇳🇮🇱x̱̱̱̱̱̄̄̄̄̄"
+            let verify = "\u{03C0}\u{0FB2C}\u{00B5}\u{1D11E}\u{1F1FA}\u{1F1F3}\u{1F1EE}\u{1F1F1}\u{0078}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}\u{0331}\u{0304}"
+            XCTAssert(
+                complicatedString.unicodeScalars.elementsEqual(verify.unicodeScalars),
+                "\(complicatedString) ≠ \(verify)")
+
+            // ••••• Set up dependency.
+            let dependencyName = "UnicodeDependency‐\(complicatedString)"
+            let dependencyOrigin = AbsolutePath(#file).parentDirectory.parentDirectory.parentDirectory
+                .appending(component: "Fixtures")
+                .appending(component: "Miscellaneous")
+                .appending(component: dependencyName)
+            let dependencyDestination = prefix.parentDirectory.appending(component: dependencyName)
+            try? FileManager.default.removeItem(atPath: dependencyDestination.pathString)
+            defer { try? FileManager.default.removeItem(atPath: dependencyDestination.pathString) }
+            try FileManager.default.copyItem(
+                atPath: dependencyOrigin.pathString,
+                toPath: dependencyDestination.pathString)
+            let dependency = GitRepository(path: dependencyDestination)
+            try dependency.create()
+            try dependency.stageEverything()
+            try dependency.commit()
+            try dependency.tag(name: "1.0.0")
+            // •••••
+
+            // Attempt several operations.
+            try SwiftPMProduct.SwiftTest.execute([], packagePath: prefix)
+            try SwiftPMProduct.SwiftRun.execute([complicatedString + "‐tool"], packagePath: prefix)
+        }
+        #endif
+    }
 }

Tests/FunctionalTests/XCTestManifests.swift

@@ -50,6 +50,7 @@ extension MiscellaneousTestCase {
         ("testSwiftTestFilter", testSwiftTestFilter),
         ("testSwiftTestLinuxMainGeneration", testSwiftTestLinuxMainGeneration),
         ("testSwiftTestParallel", testSwiftTestParallel),
+        ("testUnicode", testUnicode),
     ]
 }