pricing

services/cataloguePrice_test.go

@@ -0,0 +1,60 @@
+package services
+
+import "testing"
+
+/*
+Import used to write no price at all — "import is not pricing, the merchant sets
+it". Right about who decides, wrong about what a shopper sees in between: the
+product went live at ₹0, which on a phone reads as free rather than as unpriced.
+A product uploaded by sheet carried its price and showed it; the same product
+imported from the catalogue showed nothing.
+
+The catalogue quotes a range as a string, so it has to be read rather than cast.
+*/
+
+func TestARangeGivesItsLowEnd(t *testing.T) {
+	// Too low is a margin the shop notices and corrects; too high is a shopper
+	// quietly deciding the shop is expensive.
+	if got := SuggestedPriceFrom("₹9-11"); got != 9 {
+		t.Errorf("₹9-11 -> %v, want 9", got)
+	}
+	if got := SuggestedPriceFrom("₹75-95"); got != 75 {
+		t.Errorf("₹75-95 -> %v, want 75", got)
+	}
+}
+
+func TestASinglePriceIsReadAsItself(t *testing.T) {
+	if got := SuggestedPriceFrom("₹22"); got != 22 {
+		t.Errorf("₹22 -> %v, want 22", got)
+	}
+}
+
+func TestPaiseSurvive(t *testing.T) {
+	if got := SuggestedPriceFrom("₹12.50 - ₹15.75"); got != 12.5 {
+		t.Errorf("got %v, want 12.5", got)
+	}
+}
+
+func TestOrderInsideTheRangeDoesNotMatter(t *testing.T) {
+	// A range written backwards still has a low end.
+	if got := SuggestedPriceFrom("₹95-75"); got != 75 {
+		t.Errorf("got %v, want 75", got)
+	}
+}
+
+func TestNoPriceMeansNoPrice(t *testing.T) {
+	// 159 of 672 catalogue rows carry no range. Inventing a figure for those
+	// would be worse than showing none — the merchant would never know to look.
+	for _, input := range []string{"", "   ", "₹", "price on request", "N/A"} {
+		if got := SuggestedPriceFrom(input); got != 0 {
+			t.Errorf("%q -> %v, want 0", input, got)
+		}
+	}
+}
+
+func TestAZeroInTheRangeIsNotAPrice(t *testing.T) {
+	// "₹0-50" means the low end is unknown, not that the product is free.
+	if got := SuggestedPriceFrom("₹0-50"); got != 50 {
+		t.Errorf("got %v, want 50", got)
+	}
+}