Add test for jwt token converter

src/test/java/eu/dissco/orchestration/backend/security/JwtAuthConverterTest.java

@@ -0,0 +1,58 @@
+package eu.dissco.orchestration.backend.security;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.Map;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.security.oauth2.jwt.Jwt;
+
+@ExtendWith(MockitoExtension.class)
+class JwtAuthConverterTest {
+
+  private JwtAuthConverter converter;
+
+  @BeforeEach
+  void setup() {
+    converter = new JwtAuthConverter();
+  }
+
+  @Test
+  void testEmptyToken() {
+    // Given
+    var jwt = new Jwt("SomeRandomStringWithTheFullValue", Instant.now(), Instant.now(),
+        Map.of("kid", "SomeRandom", "typ", "JWT", "alg", "RS256"),
+        Map.of("sub", "adf294ba-bb03-4962-8042-a37f1648458e"));
+
+    // When
+    var token = converter.convert(jwt);
+
+    // Then
+    assertThat(token.isAuthenticated()).isTrue();
+    assertThat(token.getName()).isEqualTo("adf294ba-bb03-4962-8042-a37f1648458e");
+    assertThat(token.getAuthorities()).isEmpty();
+  }
+
+  @Test
+  void testTokenRoles() {
+    // Given
+    var jwt = new Jwt("SomeRandomStringWithTheFullValue", Instant.now(), Instant.now(),
+        Map.of("kid", "SomeRandom", "typ", "JWT", "alg", "RS256"),
+        Map.of("sub", "adf294ba-bb03-4962-8042-a37f1648458e",
+            "resource_access", Map.of("orchestration-service",
+                Map.of("roles", List.of("orchestration-admin")))));
+
+    // When
+    var token = converter.convert(jwt);
+
+    // Then
+    assertThat(token.isAuthenticated()).isTrue();
+    assertThat(token.getName()).isEqualTo("adf294ba-bb03-4962-8042-a37f1648458e");
+    assertThat(token.getAuthorities()).hasSize(1);
+  }
+
+}