Ajout de tests pour Application.java

Author: Pierre-Yves Fourmond

.idea/misc.xml

@@ -33,6 +33,7 @@ run-installed-app: .check-install-dir ## Lancer l'application installée
 
 test: ## Exécuter les tests
 	./src/LanguageTest.java
+	./src/ApplicationTest.java
 
 .check-install-dir:
 ifndef DEST_DIR

Makefile

@@ -0,0 +1,24 @@
+//usr/bin/env java -enableassertions --class-path ${APP_DIR:-.}/lib/'*' "$0" "$@"; exit $?
+
+void main() {
+    TestRunner.runTests(getClass());
+}
+
+void sayHelloFrenchTest() {
+    String output = runApplication("--language", "French");
+    assert output.contains("Bonjour 🇫🇷") : "Expected 'Bonjour 🇫🇷' but got: " + output;
+}
+
+void sayHelloEnglishTest() {
+    String output = runApplication("--language", "English");
+    assert output.contains("Hello 🇬🇧") : "Expected 'Hello 🇬🇧' but got: " + output;
+}
+
+void helpFlagTest() {
+    String output = runApplication("--help");
+    assert output.contains("Usage:") : "Help should start with 'Usage:'";
+}
+
+String runApplication(String... args) {
+    return TestRunner.runApplication("./src/Application.java", args);
+}

src/ApplicationTest.java

@@ -1,12 +1,31 @@
 import module java.base;
 
+import static java.util.stream.Collectors.joining;
+
 class TestRunner {
+
     static void runTests(Class<?>... classes) {
         for (Class<?> clazz : classes) {
             runTests(getInstance(clazz));
         }
     }
 
+    static String runApplication(String name, String... args) {
+        try {
+            var command = new ArrayList<String>();
+            command.add(name);
+            command.addAll(List.of(args));
+            var process = new ProcessBuilder(command).start();
+            try (var reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
+                String output = reader.lines().collect(joining("\n"));
+                process.waitFor();
+                return output;
+            }
+        } catch (Exception exception) {
+            throw new RuntimeException("Application has failed to start", exception);
+        }
+    }
+
     private static void runTests(Object instance) {
         Arrays.stream(instance.getClass().getDeclaredMethods())
                 .forEach(method -> runTest(instance, method));