[PRDP-254] added Cosmos service unit test

src/test/java/it/gov/pagopa/receipt/pdf/helpdesk/service/impl/ReceiptCosmosServiceImplTest.java

@@ -0,0 +1,53 @@
+package it.gov.pagopa.receipt.pdf.helpdesk.service.impl;
+
+import it.gov.pagopa.receipt.pdf.helpdesk.client.ReceiptCosmosClient;
+import it.gov.pagopa.receipt.pdf.helpdesk.entity.receipt.Receipt;
+import it.gov.pagopa.receipt.pdf.helpdesk.exception.ReceiptNotFoundException;
+import it.gov.pagopa.receipt.pdf.helpdesk.service.ReceiptCosmosService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+class ReceiptCosmosServiceImplTest {
+
+    private ReceiptCosmosClient receiptCosmosClientMock;
+
+    private ReceiptCosmosService sut;
+
+    @BeforeEach
+    void setUp() {
+        receiptCosmosClientMock = mock(ReceiptCosmosClient.class);
+
+        sut = spy(new ReceiptCosmosServiceImpl(receiptCosmosClientMock));
+    }
+
+    @Test
+    void getReceiptSuccess() throws ReceiptNotFoundException {
+        when(receiptCosmosClientMock.getReceiptDocument(anyString())).thenReturn(new Receipt());
+
+        Receipt receipt = assertDoesNotThrow(() -> sut.getReceipt(anyString()));
+
+        assertNotNull(receipt);
+    }
+
+    @Test
+    void getReceiptFailClientThrowsReceiptNotFound() throws ReceiptNotFoundException {
+        when(receiptCosmosClientMock.getReceiptDocument(anyString())).thenThrow(ReceiptNotFoundException.class);
+
+        assertThrows(ReceiptNotFoundException.class, () -> sut.getReceipt(anyString()));
+    }
+
+    @Test
+    void getReceiptFailClientReturnNull() throws ReceiptNotFoundException {
+        when(receiptCosmosClientMock.getReceiptDocument(anyString())).thenReturn(null);
+
+        assertThrows(ReceiptNotFoundException.class, () -> sut.getReceipt(anyString()));
+    }
+}