Implemented some tests for the RunProcessTaskTests case tests in the tests target.

Library/Sources/Internal/Tasks/RunProcessTask.swift

@@ -60,7 +60,7 @@ struct RunProcessTask {
         } catch let error as RunProcessError {
             throw error
         } catch {
-            throw RunProcessError.captured(error)
+            throw RunProcessError.captured(error.localizedDescription)
         }
     }
     
@@ -68,8 +68,8 @@ struct RunProcessTask {
 
 // MARK: - Errors
 
-public enum RunProcessError: Error {
-    case captured(_ error: Error)
+public enum RunProcessError: Error, Equatable {
+    case captured(_ output: String)
     case output(_ output: String)
     case unexpected
 }

Test/Sources/Cases/Internal/Tasks/RunProcessTaskTests.swift

@@ -0,0 +1,68 @@
+import Foundation
+import Testing
+
+@testable import ColibriLibrary
+
+struct RunProcessTaskTests {
+    
+    // MARK: Properties
+    
+    private var process: Process
+    
+    // MARK: Initialisers
+    
+    init() {
+        self.process = Process()
+    }
+
+    // MARK: Functions tests
+  
+    @Test(arguments: [Argument.empty, Argument.listAllInFolder])
+    func run(with arguments: [String]) async throws {
+        // GIVEN
+        var task = RunProcessTask(process: process)
+
+        // WHEN
+        let output = try await task(path: .ls, arguments: arguments)
+
+        // THEN
+        #expect(output.isEmpty == false)
+    }
+    
+    @Test(arguments: zip([Argument.help, Argument.listAllInPWD], Throw.outputs))
+    func runThrows(with arguments: [String], throws error: RunProcessError) async throws {
+        // GIVEN
+        var task = RunProcessTask(process: process)
+        
+        // WHEN
+        // THEN
+        await #expect(throws: error) {
+            try await task(path: .ls, arguments: arguments)
+        }
+    }
+
+}
+
+// MARK: - String+Constants
+
+private extension String {
+    static let ls = "/bin/ls"
+}
+
+// MARK: - Parameters
+
+private extension RunProcessTaskTests {
+    enum Argument {
+        static let empty: [String] = []
+        static let help: [String] = ["--help"]
+        static let listAllInFolder: [String] = ["-la", "."]
+        static let listAllInPWD: [String] = ["-la", "~"]
+    }
+    
+    enum Throw {
+        static let outputs: [RunProcessError] = [
+            .output("ls: unrecognized option `--help\'\nusage: ls [-@ABCFGHILOPRSTUWXabcdefghiklmnopqrstuvwxy1%,] [--color=when] [-D format] [file ...]\n"),
+            .output("ls: ~: No such file or directory\n")
+        ]
+    }
+}