Add tests for GenerateXcodeproj

Add test cases for the inclusion of files in the root directory,
for the inclusion of non-source files in source directories
and for the exclusion of files by git.

Author: ViktorSimko

Tests/XcodeprojTests/GenerateXcodeprojTests.swift

@@ -13,6 +13,7 @@ import TestSupport
 import PackageDescription
 import PackageGraph
 import PackageModel
+import SourceControl
 @testable import Xcodeproj
 import Utility
 import XCTest
@@ -101,6 +102,83 @@ class GenerateXcodeprojTests: XCTestCase {
         XCTAssertTrue(warnings.contains("warning: Target '\(moduleName)' conflicts with required framework filenames, rename this target to avoid conflicts."))
     }
 
+    func testGenerateXcodeprojWithRootFiles() {
+        mktmpdir { dstdir in
+
+            let packagePath = dstdir.appending(component: "Foo")
+            let modulePath = packagePath.appending(components: "Sources", "DummyModule")
+            try makeDirectories(modulePath)
+            try localFileSystem.writeFileContents(modulePath.appending(component: "dummy.swift"), bytes: "dummy_data")
+            try localFileSystem.writeFileContents(packagePath.appending(component: "a.txt"), bytes: "dummy_data")
+
+            let diagnostics = DiagnosticsEngine()
+            let graph = loadMockPackageGraph([packagePath.asString: Package(name: "Foo")], root: packagePath.asString, diagnostics: diagnostics, in: localFileSystem)
+            XCTAssertFalse(diagnostics.hasErrors)
+
+            let projectName = "DummyProjectName"
+            let outpath = Xcodeproj.buildXcodeprojPath(outputDir: dstdir, projectName: projectName)
+            let project = try Xcodeproj.generate(projectName: projectName, xcodeprojPath: outpath, graph: graph, options: XcodeprojOptions(), diagnostics: diagnostics)
+
+            XCTAssertTrue(project.mainGroup.subitems.contains { $0.path == "a.txt" })
+        }
+    }
+
+    func testGenerateXcodeprojWithNonSourceFilesInSourceDirectories() {
+        mktmpdir { dstdir in
+
+            let packagePath = dstdir.appending(component: "Foo")
+            let modulePath = packagePath.appending(components: "Sources", "DummyModule")
+            try makeDirectories(modulePath)
+            try localFileSystem.writeFileContents(modulePath.appending(component: "dummy.swift"), bytes: "dummy_data")
+            try localFileSystem.writeFileContents(modulePath.appending(component: "a.txt"), bytes: "dummy_data")
+
+            let diagnostics = DiagnosticsEngine()
+            let graph = loadMockPackageGraph([packagePath.asString: Package(name: "Foo")], root: packagePath.asString, diagnostics: diagnostics, in: localFileSystem)
+            XCTAssertFalse(diagnostics.hasErrors)
+
+            let projectName = "DummyProjectName"
+            let outpath = Xcodeproj.buildXcodeprojPath(outputDir: dstdir, projectName: projectName)
+            let project = try Xcodeproj.generate(projectName: projectName, xcodeprojPath: outpath, graph: graph, options: XcodeprojOptions(), diagnostics: diagnostics)
+
+            let sources = project.mainGroup.subitems[1] as? Xcode.Group
+            let dummyModule = sources?.subitems[0] as? Xcode.Group
+            let aTxt = dummyModule?.subitems[0]
+
+            XCTAssertEqual(aTxt?.path, "a.txt")
+        }
+    }
+
+    func testGenerateXcodeprojWithFilesIgnoredByGit() {
+        mktmpdir { dstdir in
+
+            let packagePath = dstdir.appending(component: "Foo")
+            let modulePath = packagePath.appending(components: "Sources", "DummyModule")
+
+            try makeDirectories(modulePath)
+            try localFileSystem.writeFileContents(modulePath.appending(component: "dummy.swift"), bytes: "dummy_data")
+
+            initGitRepo(packagePath, addFile: false)
+            // Add a .gitignore
+            try localFileSystem.writeFileContents(packagePath.appending(component: ".gitignore"), bytes: "ignored_file")
+            try localFileSystem.writeFileContents(modulePath.appending(component: "ignored_file"), bytes: "dummy_data")
+            try localFileSystem.writeFileContents(packagePath.appending(component: "ignored_file"), bytes: "dummy_data")
+
+            let diagnostics = DiagnosticsEngine()
+            let graph = loadMockPackageGraph([packagePath.asString: Package(name: "Foo")], root: packagePath.asString, diagnostics: diagnostics, in: localFileSystem)
+            XCTAssertFalse(diagnostics.hasErrors)
+
+            let projectName = "DummyProjectName"
+            let outpath = Xcodeproj.buildXcodeprojPath(outputDir: dstdir, projectName: projectName)
+            let project = try Xcodeproj.generate(projectName: projectName, xcodeprojPath: outpath, graph: graph, options: XcodeprojOptions(), diagnostics: diagnostics)
+
+            let sources = project.mainGroup.subitems[1] as? Xcode.Group
+            let dummyModule = sources?.subitems[0] as? Xcode.Group
+
+            XCTAssertEqual(dummyModule?.subitems.count, 1)
+            XCTAssertFalse(project.mainGroup.subitems.contains { $0.path == "ignored_file" })
+        }
+    }
+
     static var allTests = [
         ("testXcodebuildCanParseIt", testXcodebuildCanParseIt),
         ("testXcconfigOverrideValidatesPath", testXcconfigOverrideValidatesPath),