src/test/java/com/example/demo/service/DeveloperServiceTest.java

@@ -0,0 +1,88 @@
+package com.example.demo.service;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.DisplayName;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DeveloperServiceTest {
+
+    private DeveloperService developerService;
+
+    @BeforeEach
+    void setUp() {
+        developerService = new DeveloperService();
+    }
+
+    @Test
+    @DisplayName("Developer role should have read-write permission")
+    void getRolePermission_developer_returnsReadWrite() {
+        String permission = developerService.getRolePermission("developer");
+        assertEquals("read-write", permission);
+    }
+
+    @Test
+    @DisplayName("Viewer role should have read-only permission")
+    void getRolePermission_viewer_returnsReadOnly() {
+        String permission = developerService.getRolePermission("viewer");
+        assertEquals("read-only", permission);
+    }
+
+    @Test
+    @DisplayName("Admin role should have full-access permission")
+    void getRolePermission_admin_returnsFullAccess() {
+        String permission = developerService.getRolePermission("admin");
+        assertEquals("full-access", permission);
+    }
+
+    @Test
+    @DisplayName("Unknown role should return no-access")
+    void getRolePermission_unknown_returnsNoAccess() {
+        String permission = developerService.getRolePermission("unknown");
+        assertEquals("no-access", permission);
+    }
+
+    @Test
+    @DisplayName("Role lookup should be case-insensitive")
+    void getRolePermission_caseInsensitive() {
+        assertEquals("read-write", developerService.getRolePermission("DEVELOPER"));
+        assertEquals("read-write", developerService.getRolePermission("Developer"));
+    }
+
+    @Test
+    @DisplayName("getAllRoles should return all defined roles")
+    void getAllRoles_returnsAllRoles() {
+        List<String> roles = developerService.getAllRoles();
+        assertEquals(3, roles.size());
+        assertTrue(roles.contains("developer"));
+        assertTrue(roles.contains("viewer"));
+        assertTrue(roles.contains("admin"));
+    }
+
+    @Test
+    @DisplayName("Admin should have all permissions")
+    void hasPermission_admin_hasAllPermissions() {
+        assertTrue(developerService.hasPermission("admin", "read"));
+        assertTrue(developerService.hasPermission("admin", "write"));
+        assertTrue(developerService.hasPermission("admin", "delete"));
+    }
+
+    @Test
+    @DisplayName("Developer should have read and write but not delete")
+    void hasPermission_developer_readWriteNotDelete() {
+        assertTrue(developerService.hasPermission("developer", "read"));
+        assertTrue(developerService.hasPermission("developer", "write"));
+        assertFalse(developerService.hasPermission("developer", "delete"));
+    }
+
+    @Test
+    @DisplayName("Viewer should only have read permission")
+    void hasPermission_viewer_onlyRead() {
+        assertTrue(developerService.hasPermission("viewer", "read"));
+        assertFalse(developerService.hasPermission("viewer", "write"));
+        assertFalse(developerService.hasPermission("viewer", "delete"));
+    }
+}