StripePaymentGateway.java

1 
package com.rbctcsworld.ecommerce.payment;
2
3 
import com.rbctcsworld.ecommerce.common.exception.PaymentUnavailableException;
4 
import org.slf4j.Logger;
5 
import org.slf4j.LoggerFactory;
6
7 
import java.math.BigDecimal;
8 
import java.math.RoundingMode;
9 
import java.util.Map;
10
11 
/**
12 
 * Payments through Stripe (PaymentIntents + Refunds), app.payment.provider=stripe.
13 
 *
14 
 * Card numbers never go to Stripe: in a real shop the browser hands the card to Stripe (Stripe Elements)
15 
 * and the backend only sees a PaymentMethod id. This demo keeps its own card form, so the backend maps
16 
 * Stripe's published test cards to Stripe's ready-made test PaymentMethods. Any other number is refused.
17 
 *
18 
 * Outcomes:
19 
 *  - status "succeeded"        -> approved, the PaymentIntent id is kept for refunds
20 
 *  - card_error (402 from Stripe) -> declined with a short reason, same texts as the mock gateway
21 
 *  - anything else (network, 5xx, bad key, invalid request) -> PaymentUnavailableException (HTTP 503)
22 
 */
23 
public class StripePaymentGateway implements PaymentGateway {
24
25 
    private static final Logger log = LoggerFactory.getLogger(StripePaymentGateway.class);
26
27 
    /** Stripe test card -> Stripe test PaymentMethod (https://docs.stripe.com/testing). */
28 
    static final Map<String, String> TEST_PAYMENT_METHODS = Map.of(
29 
            "4242424242424242", "pm_card_visa",
30 
            "5555555555554444", "pm_card_mastercard",
31 
            MockPaymentGateway.DECLINED_CARD, "pm_card_chargeDeclined",
32 
            MockPaymentGateway.INSUFFICIENT_FUNDS_CARD, "pm_card_chargeDeclinedInsufficientFunds",
33 
            "4000000000000069", "pm_card_chargeDeclinedExpiredCard",
34 
            "4000000000000127", "pm_card_chargeDeclinedIncorrectCvc");
35
36 
    static final String UNAVAILABLE = "Payment service is not available right now. Please try again in a moment.";
37
38 
    private final StripeClient stripe;
39 
    private final String currency;
40
41 
    StripePaymentGateway(StripeClient stripe, String currency) {
42 
        this.stripe = stripe;
43 
        this.currency = currency;
44 
    }
45
46 
    @Override
47 
    public GatewayResult charge(Long orderId, String cardNumber, BigDecimal amount) {
48 
        String paymentMethod = TEST_PAYMENT_METHODS.get(cardNumber);
49 1 1. charge : removed conditional - replaced equality check with false → KILLED
 
        if (paymentMethod == null) {
50 1 1. charge : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::charge → KILLED
 
            return GatewayResult.decline("Use a Stripe test card, e.g. 4242 4242 4242 4242", null);
51 
        }
52 1 1. charge : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::charge → KILLED
 
        return chargeToken(orderId, paymentMethod, amount);
53 
    }
54
55 
    /** In test mode the "token" of a card is its Stripe test PaymentMethod; live mode would attach a real one. */
56 
    @Override
57 
    public String tokenize(String cardNumber) {
58 1 1. tokenize : replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::tokenize → NO_COVERAGE
 
        return TEST_PAYMENT_METHODS.get(cardNumber);
59 
    }
60
61 
    @Override
62 
    public GatewayResult chargeToken(Long orderId, String paymentMethod, BigDecimal amount) {
63 2 1. chargeToken : removed conditional - replaced equality check with false → SURVIVED
2. chargeToken : removed conditional - replaced equality check with false → KILLED
 
        if (paymentMethod == null || !paymentMethod.startsWith("pm_")) {
64 1 1. chargeToken : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → NO_COVERAGE
 
            return GatewayResult.decline("Unknown saved card", null);
65 
        }
66 
        long cents = cents(amount);
67 
        // same order + amount + card = same key: a retry after a timeout returns the first answer, no double charge
68 
        String key = "order-" + orderId + "-charge-" + cents + "-" + paymentMethod;
69 
        try {
70 
            StripeClient.PaymentIntent intent = stripe.createPaymentIntent(cents, currency, paymentMethod, orderId, key);
71 1 1. chargeToken : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → KILLED
 
            return switch (intent.status()) {
72 
                case "succeeded" -> GatewayResult.ok(intent.id());
73 
                case "requires_action" -> GatewayResult.decline("Card needs authentication (3-D Secure)", intent.id());
74 
                default -> GatewayResult.decline("Payment not completed (" + intent.status() + ")", intent.id());
75 
            };
76 
        } catch (StripeException e) {
77 1 1. chargeToken : removed conditional - replaced equality check with false → KILLED
 
            if (e.isCardError()) {
78 1 1. chargeToken : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → KILLED
 
                return GatewayResult.decline(reason(e), e.paymentIntentId());
79 
            }
80 
            throw unavailable("charge", orderId, e);
81 
        }
82 
    }
83
84 
    @Override
85 
    public GatewayResult refund(Long orderId, String chargeReference, BigDecimal amount, int refundNumber) {
86 2 1. refund : removed conditional - replaced equality check with false → KILLED
2. refund : removed conditional - replaced equality check with false → KILLED
 
        if (chargeReference == null || !chargeReference.startsWith("pi_")) {
87 
            throw new PaymentUnavailableException("This payment was not made through Stripe and cannot be refunded automatically.");
88 
        }
89 
        long cents = cents(amount);
90 
        String key = "order-" + orderId + "-refund-" + refundNumber + "-" + cents;
91 
        try {
92 
            StripeClient.Refund refund = stripe.createRefund(chargeReference, cents, orderId, key);
93 1 1. refund : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::refund → KILLED
 
            return switch (refund.status()) {
94 
                case "succeeded", "pending" -> GatewayResult.ok(refund.id());     // card refunds may settle later
95 
                default -> GatewayResult.decline("Refund " + refund.status(), refund.id());
96 
            };
97 
        } catch (StripeException e) {
98 
            throw unavailable("refund", orderId, e);
99 
        }
100 
    }
101
102 
    @Override
103 
    public String name() {
104 1 1. name : replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::name → KILLED
 
        return "stripe";
105 
    }
106
107 
    /** Stripe wants whole cents: 24.50 -> 2450 (stripe-mock rejects "24.50"). */
108 
    static long cents(BigDecimal amount) {
109 1 1. cents : replaced long return with 0 for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::cents → KILLED
 
        return amount.setScale(2, RoundingMode.UNNECESSARY).movePointRight(2).longValueExact();
110 
    }
111
112 
    /** Short, customer-safe reasons - the same texts as the mock gateway for the same test cards. */
113 
    static String reason(StripeException e) {
114 1 1. reason : removed conditional - replaced equality check with false → KILLED
 
        String code = e.declineCode() != null ? e.declineCode() : e.code();
115 2 1. reason : replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::reason → KILLED
2. reason : removed conditional - replaced equality check with false → KILLED
 
        if (code == null) return "Card declined";
116 1 1. reason : replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::reason → KILLED
 
        return switch (code) {
117 
            case "insufficient_funds" -> "Insufficient funds";
118 
            case "expired_card" -> "Card has expired";
119 
            case "incorrect_cvc" -> "Incorrect CVC";
120 
            default -> "Card declined";
121 
        };
122 
    }
123
124 
    private static PaymentUnavailableException unavailable(String action, Long orderId, StripeException e) {
125 
        // the message may help support; it never contains card data or the API key
126 
        log.error("Stripe {} for order {} failed: HTTP {} {} {}", action, orderId, e.status(), e.type(), e.getMessage());
127 1 1. unavailable : replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::unavailable → KILLED
 
        return new PaymentUnavailableException(UNAVAILABLE);
128 
    }
129 
}

Mutations

49

1.1
Location : charge
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:unknownCardNeverReachesStripe()] removed conditional - replaced equality check with false → KILLED

50

1.1
Location : charge
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:unknownCardNeverReachesStripe()] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::charge → KILLED

52

1.1
Location : charge
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:approvedChargeKeepsThePaymentIntentId()] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::charge → KILLED

58

1.1
Location : tokenize
Killed by : none replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::tokenize → NO_COVERAGE

63

1.1
Location : chargeToken
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:sameOrderAmountAndCardGiveTheSameIdempotencyKeyAnotherCardADifferentOne()] removed conditional - replaced equality check with false → KILLED

2.2
Location : chargeToken
Killed by : none removed conditional - replaced equality check with false → SURVIVED Covering tests

64

1.1
Location : chargeToken
Killed by : none replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → NO_COVERAGE

71

1.1
Location : chargeToken
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:approvedChargeKeepsThePaymentIntentId()] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → KILLED

77

1.1
Location : chargeToken
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#6] removed conditional - replaced equality check with false → KILLED

78

1.1
Location : chargeToken
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#6] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::chargeToken → KILLED

86

1.1
Location : refund
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:refundSucceedsOrIsPending(java.lang.String)]/[test-template-invocation:#1] removed conditional - replaced equality check with false → KILLED

2.2
Location : refund
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:paymentsNotMadeThroughStripeCannotBeRefundedThere(java.lang.String)]/[test-template-invocation:#2] removed conditional - replaced equality check with false → KILLED

93

1.1
Location : refund
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:refundSucceedsOrIsPending(java.lang.String)]/[test-template-invocation:#1] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::refund → KILLED

104

1.1
Location : name
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:nameIsStripe()] replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::name → KILLED

109

1.1
Location : cents
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:amountsGoToStripeInCents()] replaced long return with 0 for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::cents → KILLED

114

1.1
Location : reason
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#1] removed conditional - replaced equality check with false → KILLED

115

1.1
Location : reason
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#6] replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::reason → KILLED

2.2
Location : reason
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#6] removed conditional - replaced equality check with false → KILLED

116

1.1
Location : reason
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[test-template:cardErrorsBecomeShortCustomerSafeReasons(java.lang.String, java.lang.String, java.lang.String)]/[test-template-invocation:#2] replaced return value with "" for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::reason → KILLED

127

1.1
Location : unavailable
Killed by : com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest.[engine:junit-jupiter]/[class:com.rbctcsworld.ecommerce.payment.StripePaymentGatewayTest]/[method:refundErrorIs503()] replaced return value with null for com/rbctcsworld/ecommerce/payment/StripePaymentGateway::unavailable → KILLED

Active mutators

Tests examined


Report generated by PIT 1.30.0 support