[DE-117] DE-545 Tests for "Remove Coupon from Subscription" (#62)

tests/src/test/java/com/maxio/advancedbilling/controllers/subscriptions/SubscriptionsControllerRemoveCouponTest.java

@@ -0,0 +1,95 @@
+package com.maxio.advancedbilling.controllers.subscriptions;
+
+import com.maxio.advancedbilling.AdvancedBillingClient;
+import com.maxio.advancedbilling.TestClient;
+import com.maxio.advancedbilling.controllers.SubscriptionsController;
+import com.maxio.advancedbilling.exceptions.ApiException;
+import com.maxio.advancedbilling.exceptions.SubscriptionRemoveCouponErrorsException;
+import com.maxio.advancedbilling.models.Coupon;
+import com.maxio.advancedbilling.models.Customer;
+import com.maxio.advancedbilling.models.Product;
+import com.maxio.advancedbilling.models.ProductFamily;
+import com.maxio.advancedbilling.models.Subscription;
+import com.maxio.advancedbilling.utils.TestSetup;
+import com.maxio.advancedbilling.utils.TestTeardown;
+import com.maxio.advancedbilling.utils.assertions.CommonAssertions;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class SubscriptionsControllerRemoveCouponTest {
+
+    private static final TestSetup TEST_SETUP = new TestSetup();
+    private static final AdvancedBillingClient CLIENT = TestClient.createClient();
+    private static final SubscriptionsController SUBSCRIPTIONS_CONTROLLER = CLIENT.getSubscriptionsController();
+
+    private static Product product;
+    private static Customer customer;
+    private static Coupon percentageCoupon;
+
+    @BeforeAll
+    static void setUp() throws IOException, ApiException {
+        ProductFamily productFamily = TEST_SETUP.createProductFamily();
+        product = TEST_SETUP.createProduct(productFamily);
+        customer = TEST_SETUP.createCustomer();
+        percentageCoupon = TEST_SETUP.createPercentageCoupon(productFamily, "0.5");
+    }
+
+    @AfterAll
+    static void teardown() throws IOException, ApiException {
+        new TestTeardown().deleteCustomer(customer);
+    }
+
+    @Test
+    void shouldReturn404WhenSubscriptionNotExists() {
+        // when - then
+        CommonAssertions.assertNotFound(() -> SUBSCRIPTIONS_CONTROLLER
+                .deleteCouponFromSubscription(123, "coupon")
+        );
+    }
+
+    @Test
+    void shouldReturn422WhenSubscriptionHasNoCoupons() throws IOException, ApiException {
+        // given
+        Subscription subscription = TEST_SETUP.createSubscription(customer, product);
+
+        // when - then
+        CommonAssertions.assertUnprocessableEntity(
+                SubscriptionRemoveCouponErrorsException.class,
+                () -> SUBSCRIPTIONS_CONTROLLER.deleteCouponFromSubscription(subscription.getId(), "coupon"),
+                e -> assertThat(e.getSubscription()).containsExactly("This subscription does not have any coupons.")
+        );
+    }
+
+    @Test
+    void shouldReturn422WhenRemovingNotExistingCoupon() throws IOException, ApiException {
+        // given
+        Subscription subscription = TEST_SETUP.createSubscription(customer, product, b -> b.couponCode(percentageCoupon.getCode()));
+
+        // when - then
+        CommonAssertions.assertUnprocessableEntity(
+                SubscriptionRemoveCouponErrorsException.class,
+                () -> SUBSCRIPTIONS_CONTROLLER.deleteCouponFromSubscription(subscription.getId(), "not-existing-coupon"),
+                e -> assertThat(e.getSubscription()).containsExactly("Coupon is invalid.")
+        );
+    }
+
+    @Test
+    void shouldRemoveCouponFromSubscription() throws IOException, ApiException {
+        // given
+        Subscription subscription = TEST_SETUP.createSubscription(customer, product, b -> b.couponCode(percentageCoupon.getCode()));
+
+        // when
+        SUBSCRIPTIONS_CONTROLLER.deleteCouponFromSubscription(subscription.getId(), subscription.getCouponCode());
+
+        // then
+        Subscription updatedSubscription = SUBSCRIPTIONS_CONTROLLER
+                .readSubscription(subscription.getId(), null)
+                .getSubscription();
+        assertThat(updatedSubscription.getCouponCode()).isNull();
+    }
+}