tests and eurc

tests/ShouldParseMolliePayments/main.cpp

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+/*
+catcrafts.net
+Copyright (C) 2026 Catcrafts
+
+The source code of this website is made available for viewing purposes only.
+No permission is granted to copy, modify, distribute, or create derivative works.
+*/
+
+// The wire-amount parser (Mollie quotes amounts as strings) and the Mollie
+// payment parser — the line between "the buyer paid" and "the provider said
+// something we did not understand". Both refuse rather than guess.
+
+import std;
+import Catcrafts.Shared;
+import Catcrafts.Server;
+
+using namespace Catcrafts;
+
+namespace {
+
+int failures = 0;
+
+void Check(bool ok, std::string_view what, std::string_view got = {}) {
+    if (ok) return;
+    ++failures;
+    std::println(std::cerr, "FAIL: {}{}{}", what,
+                 got.empty() ? "" : "  got: ", got);
+}
+
+} // namespace
+
+int main() {
+    // ── the wire-amount parser ────────────────────────────────────────
+    using Server::ParseAmountToMinor;
+    Check(ParseAmountToMinor("614.00") == 61400, "amount: normal");
+    Check(ParseAmountToMinor("614") == 61400, "amount: no fraction");
+    Check(ParseAmountToMinor("614.5") == 61450, "amount: one fraction digit");
+    Check(ParseAmountToMinor("0.01") == 1, "amount: one cent");
+    Check(!ParseAmountToMinor("614.005").has_value(), "amount: three decimals rejected");
+    Check(!ParseAmountToMinor("-1.00").has_value(), "amount: negative rejected");
+    Check(!ParseAmountToMinor("+1.00").has_value(), "amount: sign rejected");
+    Check(!ParseAmountToMinor("1e3").has_value(), "amount: exponent rejected");
+    Check(!ParseAmountToMinor("1.").has_value(), "amount: trailing dot rejected");
+    Check(!ParseAmountToMinor(".5").has_value(), "amount: bare fraction rejected");
+    Check(!ParseAmountToMinor("").has_value(), "amount: empty rejected");
+    Check(!ParseAmountToMinor("1 000.00").has_value(), "amount: separator rejected");
+
+    // ── the Mollie payment parser ─────────────────────────────────────
+    {
+        const auto p1 = Server::ParseMolliePayment(R"({
+            "resource":"payment","id":"tr_7UhSN1zuXS","status":"open","method":null,
+            "amount":{"value":"578.30","currency":"EUR"},
+            "_links":{"checkout":{"href":"https://www.mollie.com/checkout/select-method/7UhSN1zuXS","type":"text/html"}}})");
+        Check(p1.has_value(), "mollie: open payment parses");
+        if (p1) {
+            Check(p1->id == "tr_7UhSN1zuXS", "mollie: id");
+            Check(p1->status == "open", "mollie: status");
+            Check(p1->amountMinor == 57830, "mollie: amount to cents");
+            Check(p1->checkoutUrl == "https://www.mollie.com/checkout/select-method/7UhSN1zuXS",
+                  "mollie: checkout link");
+            Check(p1->method.empty(), "mollie: null method is empty");
+        }
+        const auto p2 = Server::ParseMolliePayment(R"({
+            "id":"tr_x","status":"paid","method":"ideal",
+            "amount":{"value":"578.30","currency":"EUR"},"_links":{}})");
+        Check(p2 && p2->status == "paid" && p2->method == "ideal",
+              "mollie: paid payment carries the method");
+        const auto p3 = Server::ParseMolliePayment(R"({
+            "id":"tr_y","status":"paid","amount":{"value":"578.30","currency":"USD"}})");
+        Check(p3 && p3->amountMinor == 0, "mollie: non-EUR amount refuses to count");
+        Check(!Server::ParseMolliePayment("garbage").has_value(),
+              "mollie: malformed payload rejected");
+        Check(!Server::ParseMolliePayment(R"({"status":"open"})").has_value(),
+              "mollie: missing id rejected");
+    }
+
+    if (failures != 0) {
+        std::println(std::cerr, "{} check(s) failed", failures);
+        return 1;
+    }
+    return 0;
+}