Update test for parsing order stats without data envelope

Author: itsmeichigo

Networking/NetworkingTests/Mapper/OrderStatsMapperV4Tests.swift

@@ -218,6 +218,49 @@ final class OrderStatsV4MapperTests: XCTestCase {
         XCTAssertNil(nonZeroYearTotals.totalProducts)
         XCTAssertEqual(nonZeroYearTotals.averageOrderValue, 266)
     }
+
+    /// Verifies that all of the yearly unit OrderStatsV4 fields are parsed correctly
+    /// if the response contains no data envelope.
+    ///
+    func test_yearly_unit_stat_fields_are_properly_parsed_without_data_envelope() {
+        guard let yearlyStats = mapOrderStatsWithYearlyUnitResponseWithoutDataEnvelope() else {
+            XCTFail()
+            return
+        }
+
+        XCTAssertEqual(yearlyStats.siteID, Constants.siteID)
+        XCTAssertEqual(yearlyStats.granularity, .yearly)
+
+        XCTAssertEqual(yearlyStats.totals.totalOrders, 3)
+        XCTAssertEqual(yearlyStats.totals.totalItemsSold, 5)
+        XCTAssertEqual(yearlyStats.totals.grossRevenue, 800)
+        XCTAssertEqual(yearlyStats.totals.totalCoupons, 0)
+        XCTAssertEqual(yearlyStats.totals.couponDiscount, 0)
+        XCTAssertEqual(yearlyStats.totals.refunds, 0)
+        XCTAssertEqual(yearlyStats.totals.taxes, 0)
+        XCTAssertEqual(yearlyStats.totals.shipping, 0)
+        XCTAssertEqual(yearlyStats.totals.netRevenue, 800)
+        XCTAssertEqual(yearlyStats.totals.totalProducts, 2)
+        XCTAssertEqual(yearlyStats.totals.averageOrderValue, 266)
+
+        XCTAssertEqual(yearlyStats.intervals.count, 1)
+
+        let nonZeroYear = yearlyStats.intervals[0]
+        let nonZeroYearTotals = nonZeroYear.subtotals
+
+        XCTAssertEqual(nonZeroYear.interval, "2019")
+
+        XCTAssertEqual(nonZeroYearTotals.totalOrders, 3)
+        XCTAssertEqual(nonZeroYearTotals.grossRevenue, 800)
+        XCTAssertEqual(nonZeroYearTotals.totalCoupons, 0)
+        XCTAssertEqual(nonZeroYearTotals.couponDiscount, 0)
+        XCTAssertEqual(nonZeroYearTotals.refunds, 0)
+        XCTAssertEqual(nonZeroYearTotals.taxes, 0)
+        XCTAssertEqual(nonZeroYearTotals.shipping, 0)
+        XCTAssertEqual(nonZeroYearTotals.netRevenue, 800)
+        XCTAssertNil(nonZeroYearTotals.totalProducts)
+        XCTAssertEqual(nonZeroYearTotals.averageOrderValue, 266)
+    }
 }
 
 private extension OrderStatsV4MapperTests {
@@ -251,6 +294,12 @@ private extension OrderStatsV4MapperTests {
         return mapStatItems(from: "order-stats-v4-year", granularity: .yearly)
     }
 
+    /// Returns the OrderStatsV4Mapper output upon receiving `order-stats-v4-year-without-data`
+    ///
+    func mapOrderStatsWithYearlyUnitResponseWithoutDataEnvelope() -> OrderStatsV4? {
+        return mapStatItems(from: "order-stats-v4-year-without-data", granularity: .yearly)
+    }
+
     /// Returns the OrderStatsV4Mapper output upon receiving `filename` (Data Encoded)
     ///
     func mapStatItems(from filename: String, granularity: StatsGranularityV4) -> OrderStatsV4? {