Add SPC provider parsing helpers

internal/providers/spc/product_test.go

@@ -0,0 +1,56 @@
+package spc
+
+import "testing"
+
+func TestGeoJSONProductsStableOrder(t *testing.T) {
+	got := GeoJSONProducts()
+	if len(got) != 12 {
+		t.Fatalf("GeoJSONProducts() length = %d, want 12", len(got))
+	}
+
+	wantKeys := []string{
+		"day1_categorical",
+		"day1_tornado",
+		"day1_hail",
+		"day1_wind",
+		"day2_categorical",
+		"day2_tornado",
+		"day2_hail",
+		"day2_wind",
+		"day3_categorical",
+		"day3_tornado",
+		"day3_hail",
+		"day3_wind",
+	}
+	for i, want := range wantKeys {
+		if got[i].Key != want {
+			t.Fatalf("GeoJSONProducts()[%d].Key = %q, want %q", i, got[i].Key, want)
+		}
+		if err := validateProductDay(got[i].Day); err != nil {
+			t.Fatalf("GeoJSONProducts()[%d].Day invalid: %v", i, err)
+		}
+		if got[i].URL == "" {
+			t.Fatalf("GeoJSONProducts()[%d].URL is empty", i)
+		}
+	}
+}
+
+func TestDiscussionProductsStableOrder(t *testing.T) {
+	got := DiscussionProducts()
+	if len(got) != 3 {
+		t.Fatalf("DiscussionProducts() length = %d, want 3", len(got))
+	}
+
+	wantKeys := []string{"day1", "day2", "day3"}
+	for i, want := range wantKeys {
+		if got[i].Key != want {
+			t.Fatalf("DiscussionProducts()[%d].Key = %q, want %q", i, got[i].Key, want)
+		}
+		if got[i].Day != i+1 {
+			t.Fatalf("DiscussionProducts()[%d].Day = %d, want %d", i, got[i].Day, i+1)
+		}
+		if got[i].URL == "" {
+			t.Fatalf("DiscussionProducts()[%d].URL is empty", i)
+		}
+	}
+}