testSwapBuyWethIntegral passed

evm/test/IntegralSwapAdapter.t.sol

@@ -66,4 +66,35 @@ contract IntegralSwapAdapterTest is Test, ISwapAdapterTypes {
         }
     }
 
+    function testSwapBuyWethIntegral(uint256 specifiedAmount) public {
+        OrderSide side = OrderSide.Buy;
+
+        bytes32 pair = bytes32(bytes20(USDC_WETH_PAIR));
+
+        uint256[] memory limits = adapter.getLimits(pair, USDC, WETH);
+
+        vm.assume(specifiedAmount < limits[1]);
+        vm.assume(specifiedAmount > limits[3]);
+
+        deal(address(USDC), address(this), type(uint256).max);
+        USDC.approve(address(adapter), type(uint256).max);
+
+        uint256 usdc_balance = USDC.balanceOf(address(this));
+        uint256 weth_balance = WETH.balanceOf(address(this));
+
+        Trade memory trade = adapter.swap(pair, USDC, WETH, side, specifiedAmount);
+
+        if (trade.calculatedAmount > 0) {
+            assertEq(specifiedAmount,
+                WETH.balanceOf(address(this)) + weth_balance
+            );
+
+            assertEq(
+                trade.calculatedAmount,
+                usdc_balance - USDC.balanceOf(address(this))
+            );
+        }
+
+    }
+
 }