From a90ab851a66b0379924025dc71df74aca1c29df7 Mon Sep 17 00:00:00 2001
From: Connor Barr <crnbarr@gmail.com>
Date: Sat, 28 Dec 2024 10:44:02 +0000
Subject: [PATCH] test: added another test case

---
 .../__tests__/use-twinned-swap-input.spec.ts  | 20 ++++++++++++++++---
 packages/web/hooks/use-twinned-swap-input.ts  | 10 ++++++++++
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/packages/web/hooks/__tests__/use-twinned-swap-input.spec.ts b/packages/web/hooks/__tests__/use-twinned-swap-input.spec.ts
index 685a054fd2..cc4452b1e1 100644
--- a/packages/web/hooks/__tests__/use-twinned-swap-input.spec.ts
+++ b/packages/web/hooks/__tests__/use-twinned-swap-input.spec.ts
@@ -92,6 +92,7 @@ describe("useTwinnedSwapInput", () => {
           }
 
           act(() => {
+            result.current.setPrice("1");
             setAmount("");
             result.current.setQuoteType("in-given-out");
           });
@@ -144,20 +145,33 @@ describe("useTwinnedSwapInput", () => {
             expectedToken: focused === "fiat" ? "100.12" : "100.123456",
             expectedFiat: focused === "fiat" ? "100.12" : "100.123456",
           },
+          {
+            scenario: "a non-standard price",
+            input: "100",
+            price: "0.125",
+            expectedToken: focused === "fiat" ? "800" : "100",
+            expectedFiat: focused === "fiat" ? "100" : "12.5",
+          },
         ])(
           "should handle $scenario",
-          ({ input, expectedToken, expectedFiat, fail }) => {
+          ({ input, expectedToken, expectedFiat, fail, price = "1" }) => {
             act(() => {
+              result.current.setPrice(price);
               setAmount(input);
             });
+
+            // Check primary inputs are set correctly
             expect(result.current.tokenAmount).toBe(expectedToken);
             expect(result.current.fiatAmount).toBe(expectedFiat);
+
+            // Check market conditions are set correctly
             expect(result.current.quoteType).toBe(
               fail ? "in-given-out" : expectedQuoteType
             );
-
             if (!fail) {
-              expect(result.current[updatedMarketField]).toBe(expectedToken);
+              expect(result.current[updatedMarketField]).toBe(
+                focused === "fiat" ? expectedFiat : expectedToken
+              );
             }
           }
         );
diff --git a/packages/web/hooks/use-twinned-swap-input.ts b/packages/web/hooks/use-twinned-swap-input.ts
index 0f3b4fadce..c8c4153ca1 100644
--- a/packages/web/hooks/use-twinned-swap-input.ts
+++ b/packages/web/hooks/use-twinned-swap-input.ts
@@ -95,6 +95,11 @@ export const useTwinnedSwapInput = ({
         return;
       }
 
+      if (price.isNegative()) {
+        console.error("INPUT WARNING: Price is negative");
+        return;
+      }
+
       const tokenValue = transformAmount(value, baseAssetDecimals, false);
 
       if (
@@ -159,6 +164,11 @@ export const useTwinnedSwapInput = ({
         return;
       }
 
+      if (price.isNegative()) {
+        console.error("INPUT WARNING: Price is negative");
+        return;
+      }
+
       // Fiat amount is always 2 decimal places
       const fiatValue = transformAmount(value, 2, false);