Feature: allow passing list of changed files in

Sources/SelectiveTestingCore/SelectiveTestingTool.swift

@@ -15,6 +15,7 @@ public final class SelectiveTestingTool {
     private let baseBranch: String?
     private let basePath: Path
     private let printJSON: Bool
+    private let changedFiles: [String]
     private let renderDependencyGraph: Bool
     private let turbo: Bool
     private let dot: Bool
@@ -25,6 +26,7 @@ public final class SelectiveTestingTool {
     public init(baseBranch: String?,
                 basePath: String?,
                 testPlan: String?,
+                changedFiles: [String],
                 printJSON: Bool = false,
                 renderDependencyGraph: Bool = false,
                 dot: Bool = false,
@@ -46,6 +48,7 @@ public final class SelectiveTestingTool {
 
         self.baseBranch = baseBranch
         self.basePath = Path(finalBasePath)
+        self.changedFiles = changedFiles
         self.printJSON = printJSON
         self.renderDependencyGraph = renderDependencyGraph
         self.turbo = turbo
@@ -58,11 +61,16 @@ public final class SelectiveTestingTool {
         // 1. Identify changed files
         let changeset: Set<Path>
 
-        Logger.message("Finding changeset for repository at \(basePath)")
-        if let baseBranch {
-            changeset = try Git(path: basePath).changeset(baseBranch: baseBranch, verbose: verbose)
-        } else {
-            changeset = try Git(path: basePath).localChangeset()
+        if changedFiles.isEmpty {
+            Logger.message("Finding changeset for repository at \(basePath)")
+            if let baseBranch {
+                changeset = try Git(path: basePath).changeset(baseBranch: baseBranch, verbose: verbose)
+            } else {
+                changeset = try Git(path: basePath).localChangeset()
+            }
+        }
+        else {
+            changeset = Set(changedFiles.map { Path($0).absolute() })
         }
 
         if verbose { Logger.message("Changed files: \(changeset)") }

Sources/xcode-selective-test/SelectiveTesting.swift

@@ -13,6 +13,9 @@ struct SelectiveTesting: AsyncParsableCommand {
     @Argument(help: "Project, workspace or package path", completion: .file(extensions: ["xcworkspace", "xcodeproj"]))
     var basePath: String?
 
+    @Option(name: [.customShort("c"), .long], parsing: .upToNextOption, help: "List of changed files")
+    var changedFiles: [String] = []
+
     @Option(name: .long, help: "Name of the base branch")
     var baseBranch: String?
 
@@ -38,6 +41,7 @@ struct SelectiveTesting: AsyncParsableCommand {
         let tool = try SelectiveTestingTool(baseBranch: baseBranch,
                                             basePath: basePath,
                                             testPlan: testPlan,
+                                            changedFiles: changedFiles,
                                             printJSON: JSON,
                                             renderDependencyGraph: dependencyGraph,
                                             dot: dot,

Tests/SelectiveTestingTests/IntegrationTestTool.swift

@@ -61,6 +61,7 @@ final class IntegrationTestTool {
     func createSUT(config: Config? = nil,
                    basePath: Path? = nil,
                    testPlan: String? = nil,
+                   changedFiles: [String] = [],
                    turbo: Bool = false) throws -> SelectiveTestingTool
     {
         if let config {
@@ -72,6 +73,7 @@ final class IntegrationTestTool {
         return try SelectiveTestingTool(baseBranch: "main",
                                         basePath: basePath?.string,
                                         testPlan: testPlan,
+                                        changedFiles: changedFiles,
                                         renderDependencyGraph: false,
                                         turbo: turbo,
                                         verbose: true)
@@ -81,6 +83,7 @@ final class IntegrationTestTool {
         return try SelectiveTestingTool(baseBranch: "main",
                                         basePath: (projectPath + "ExampleWorkspace.xcworkspace").string,
                                         testPlan: "ExampleProject.xctestplan",
+                                        changedFiles: [],
                                         renderDependencyGraph: false,
                                         verbose: true)
     }

Tests/SelectiveTestingTests/SelectiveTestingProjectTests.swift

@@ -87,4 +87,20 @@ final class SelectiveTestingProjectTests: XCTestCase {
             testTool.mainProjectUITests,
         ]))
     }
+
+    func testPassingChangedFiles() async throws {
+        // given & when
+        let changedPath = testTool.projectPath + "ExampleProject/Base.lproj/Example.xib"
+        let tool = try testTool.createSUT(config: nil,
+                                          basePath: "ExampleProject.xcodeproj",
+                                          changedFiles: [changedPath.string])
+
+        // then
+        let result = try await tool.run()
+        XCTAssertEqual(result, Set([
+            testTool.mainProjectMainTarget,
+            testTool.mainProjectTests,
+            testTool.mainProjectUITests,
+        ]))
+    }
 }