✅ Fix tests

tests/unit/Testables/Shell/RealShellTest.swift

@@ -0,0 +1,79 @@
+//
+//  RealShellTest.swift
+//  PHP Monitor
+//
+//  Created by Nico Verbruggen on 28/09/2022.
+//  Copyright © 2022 Nico Verbruggen. All rights reserved.
+//
+
+import XCTest
+
+class RealShellTest: XCTestCase {
+
+    override func setUp() async throws {
+        // Reset to the default shell
+        ActiveShell.useSystem()
+    }
+
+    func test_system_shell_is_default() async {
+        XCTAssertTrue(Shell is RealShell)
+
+        let output = await Shell.pipe("php -v")
+
+        XCTAssertTrue(output.out.contains("Copyright (c) The PHP Group"))
+    }
+
+    func test_system_shell_has_path() {
+        let systemShell = Shell as! RealShell
+
+        XCTAssertTrue(systemShell.PATH.contains(":/usr/local/bin"))
+        XCTAssertTrue(systemShell.PATH.contains(":/usr/bin"))
+    }
+
+    func test_system_shell_can_buffer_output() async {
+        var bits: [String] = []
+
+        let (_, shellOutput) = try! await Shell.attach(
+            "php -r \"echo 'Hello world' . PHP_EOL; usleep(200); echo 'Goodbye world';\"",
+            didReceiveOutput: { incoming, _ in
+                bits.append(incoming)
+            },
+            withTimeout: 2.0
+        )
+
+        XCTAssertTrue(bits.contains("Hello world\n"))
+        XCTAssertTrue(bits.contains("Goodbye world"))
+        XCTAssertEqual("Hello world\nGoodbye world", shellOutput.out)
+    }
+
+    func test_system_shell_can_timeout_and_throw_error() async {
+        let expectation = XCTestExpectation(description: #function)
+
+        do {
+            _ = try await Shell.attach(
+                "php -r \"sleep(1);\"",
+                didReceiveOutput: { _, _ in },
+                withTimeout: 0.1
+            )
+        } catch {
+            XCTAssertEqual(error as? ShellError, ShellError.timedOut)
+            expectation.fulfill()
+        }
+
+        wait(for: [expectation], timeout: 5.0)
+    }
+
+    func test_system_processes_run_in_parallel() async {
+        let expectation = XCTestExpectation(description: #function)
+
+        let thing = {
+            await Shell.quiet("php -r \"usleep(700);\"")
+            await Shell.quiet("php -r \"usleep(700);\"")
+            await Shell.quiet("php -r \"usleep(700);\"")
+            expectation.fulfill()
+        }
+
+        await thing()
+        wait(for: [expectation], timeout: 1.0)
+    }
+}