lookup endpoint updated

services/scanOption_test.go

@@ -0,0 +1,119 @@
+package services
+
+import (
+	"encoding/json"
+	"testing"
+
+	"nearle/repositories"
+)
+
+/*
+What the app needs to turn a scan into an order.
+
+The scan screen is the start of a checkout: a customer photographs a packet and
+the next thing they do is add it to a basket. Every field an order line carries
+has to be on the option itself — reaching back up the response for the store, or
+splitting "500 g" to recover the unit, is the app doing work the server already
+did.
+*/
+func TestAScannedOptionCarriesEverythingAnOrderLineNeeds(t *testing.T) {
+	row := repositories.StoreOptionRow{
+		Tenantid: 1147, Locationid: 1170, Productid: 7101,
+		Productname:  "Balaji Wafers Simply Salted 135g",
+		Productimage: "https://example.test/wafers.jpg",
+		Unitvalue:    "135", Productunit: "g",
+		Price: 35, Productcost: 29,
+		Categoryid: 2, Subcategoryid: 21,
+		Stock: 4,
+	}
+
+	opt := optionFromRow(row, nil)
+
+	if opt.Tenantid != 1147 || opt.Locationid != 1170 {
+		t.Errorf("store keys missing: tenant=%d location=%d", opt.Tenantid, opt.Locationid)
+	}
+	if opt.Locationid == 0 {
+		t.Error("locationid is 0 — the app cannot place an order against no outlet")
+	}
+	if opt.Unitvalue != "135" || opt.Productunit != "g" {
+		t.Errorf("unit parts missing: %q %q", opt.Unitvalue, opt.Productunit)
+	}
+	if opt.Size != "135 g" {
+		// The printable label stays: the app has always shown it.
+		t.Errorf("size label changed: %q", opt.Size)
+	}
+	if opt.Categoryid != 2 || opt.Subcategoryid != 21 {
+		t.Errorf("category ids missing: %d %d", opt.Categoryid, opt.Subcategoryid)
+	}
+	if opt.Productimage != "https://example.test/wafers.jpg" || opt.Image != opt.Productimage {
+		t.Errorf("image not under both names: %q %q", opt.Image, opt.Productimage)
+	}
+}
+
+func TestPriceAndCostAreNotTheSameField(t *testing.T) {
+	// The money one. `price` is what the customer pays; `productcost` is what
+	// the shop paid. Billing against the cost would sell at cost, so they must
+	// never be conflated.
+	opt := optionFromRow(repositories.StoreOptionRow{
+		Productid: 1, Price: 35, Productcost: 29,
+	}, nil)
+
+	if opt.Price != 35 {
+		t.Errorf("price = %v, want 35", opt.Price)
+	}
+	if opt.Productcost != 29 {
+		t.Errorf("productcost = %v, want 29", opt.Productcost)
+	}
+	if opt.Price == opt.Productcost {
+		t.Error("price and cost collapsed into one number")
+	}
+}
+
+func TestTheWireNamesTheAppAskedFor(t *testing.T) {
+	opt := optionFromRow(repositories.StoreOptionRow{
+		Tenantid: 1147, Locationid: 1170, Productid: 7101,
+		Productname: "x", Productimage: "y",
+		Unitvalue: "135", Productunit: "g",
+		Price: 35, Productcost: 29, Categoryid: 2, Subcategoryid: 21,
+	}, nil)
+
+	encoded, err := json.Marshal(opt)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	var out map[string]any
+	if err := json.Unmarshal(encoded, &out); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+
+	for _, key := range []string{
+		"productid", "tenantid", "locationid", "productcost", "price",
+		"productname", "productimage", "unitvalue", "productunit",
+		"categoryid", "subcategoryid",
+	} {
+		if _, ok := out[key]; !ok {
+			t.Errorf("missing %q: %s", key, encoded)
+		}
+	}
+}
+
+func TestASizeRowKeepsItsOwnStoreAndPrice(t *testing.T) {
+	// A variant hanging under a matched product is a separate sellable row with
+	// its own price and its own outlet. It is what the customer actually taps
+	// when they pick 1 kg instead of 500 g.
+	opt := optionFromRow(repositories.StoreOptionRow{
+		Tenantid: 1147, Locationid: 1170, Productid: 7102,
+		Parentid: 7101, Variantname: "1 kg",
+		Unitvalue: "1", Productunit: "kg", Price: 240, Productcost: 200,
+	}, nil)
+
+	if !opt.IsVariant || opt.MatchedBy != "variant-of:7101" {
+		t.Fatalf("not recognised as a size: %+v", opt)
+	}
+	if opt.Tenantid != 1147 || opt.Locationid != 1170 || opt.Price != 240 {
+		t.Errorf("a size row lost its store or price: %+v", opt)
+	}
+	if opt.Unitvalue != "1" || opt.Productunit != "kg" {
+		t.Errorf("a size row lost its unit: %q %q", opt.Unitvalue, opt.Productunit)
+	}
+}