feat: add express pickup orders

backend/src/test/java/com/linhelp/express/ExpressFeeCalculatorTests.java

@@ -0,0 +1,24 @@
+package com.linhelp.express;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class ExpressFeeCalculatorTests {
+    @Test
+    void firstPackageCostsThreeYuan() {
+        assertThat(ExpressFeeCalculator.calculateCent(1)).isEqualTo(300);
+    }
+
+    @Test
+    void extraPackagesCostOneYuanEach() {
+        assertThat(ExpressFeeCalculator.calculateCent(3)).isEqualTo(500);
+    }
+
+    @Test
+    void packageCountMustBePositive() {
+        assertThatThrownBy(() -> ExpressFeeCalculator.calculateCent(0))
+                .hasMessageContaining("件数必须大于0");
+    }
+}

backend/src/test/java/com/linhelp/express/ExpressOrderServiceTests.java

@@ -0,0 +1,79 @@
+package com.linhelp.express;
+
+import com.linhelp.common.enums.ExpressOrderStatus;
+import com.linhelp.user.AddressRequest;
+import com.linhelp.user.AddressResponse;
+import com.linhelp.user.UserAddressService;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class ExpressOrderServiceTests {
+    @Test
+    void confirmedExpressOrderMovesToPendingPickup() {
+        UserAddressService addressService = new UserAddressService();
+        AddressResponse address = addressService.create(1L, addressRequest());
+        ExpressOrderService expressOrderService = new ExpressOrderService(addressService);
+
+        ExpressOrderRequest request = expressRequest(address.getId());
+        request.setPackageCount(3);
+        ExpressOrderResponse order = expressOrderService.create(1L, request);
+
+        assertThat(order.getFeeCent()).isEqualTo(500);
+
+        expressOrderService.confirm(order.getId());
+
+        assertThat(expressOrderService.detail(order.getId()).getStatus()).isEqualTo(ExpressOrderStatus.PENDING_PICKUP);
+    }
+
+    @Test
+    void addressMustBelongToCurrentUser() {
+        UserAddressService addressService = new UserAddressService();
+        AddressResponse otherUserAddress = addressService.create(2L, addressRequest());
+        ExpressOrderService expressOrderService = new ExpressOrderService(addressService);
+
+        assertThatThrownBy(() -> expressOrderService.create(1L, expressRequest(otherUserAddress.getId())))
+                .hasMessageContaining("地址不存在");
+    }
+
+    @Test
+    void feeAdjustmentWritesLog() {
+        UserAddressService addressService = new UserAddressService();
+        AddressResponse address = addressService.create(1L, addressRequest());
+        ExpressOrderService expressOrderService = new ExpressOrderService(addressService);
+        ExpressOrderResponse order = expressOrderService.create(1L, expressRequest(address.getId()));
+
+        expressOrderService.adjustFee(order.getId(), 800, "大件加价");
+
+        ExpressOrderResponse detail = expressOrderService.detail(order.getId());
+        assertThat(detail.getFeeCent()).isEqualTo(800);
+        assertThat(detail.getLogs()).extracting(ExpressOrderLogResponse::getContent)
+                .anyMatch(content -> content.contains("大件加价"));
+    }
+
+    private ExpressOrderRequest expressRequest(Long addressId) {
+        ExpressOrderRequest request = new ExpressOrderRequest();
+        request.setTenantId(1L);
+        request.setCommunityId(1L);
+        request.setExpressCompany("顺丰");
+        request.setPickupCode("A-1234");
+        request.setPickupAddress("北门快递站");
+        request.setReceiverPhone("13800000000");
+        request.setAddressId(addressId);
+        request.setPackageCount(1);
+        return request;
+    }
+
+    private AddressRequest addressRequest() {
+        AddressRequest request = new AddressRequest();
+        request.setTenantId(1L);
+        request.setCommunityId(1L);
+        request.setContactName("张三");
+        request.setPhone("13800000000");
+        request.setBuilding("1栋");
+        request.setRoom("101");
+        request.setDetail("门口");
+        return request;
+    }
+}