tests

test/libraries/BipsLibrary.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.24;
+
+import "forge-std/Test.sol";
+import {BipsLibrary} from "../../src/libraries/BipsLibrary.sol";
+
+contract BipsLibraryTest is Test {
+    using BipsLibrary for uint256;
+
+    // The block gas limit set in foundry config is 300_000_000 (300M) for testing purposes
+    uint256 BLOCK_GAS_LIMIT;
+
+    function setUp() public {
+        BLOCK_GAS_LIMIT = block.gaslimit;
+    }
+
+    function test_fuzz_calculatePortion(uint256 amount, uint256 bips) public {
+        amount = bound(amount, 0, uint256(type(uint128).max));
+        if (bips > BipsLibrary.BPS_DENOMINATOR) {
+            vm.expectRevert(BipsLibrary.InvalidBips.selector);
+            amount.calculatePortion(bips);
+        } else {
+            assertEq(amount.calculatePortion(bips), amount * bips / BipsLibrary.BPS_DENOMINATOR);
+        }
+    }
+
+    function test_fuzz_gasLimit(uint256 bips) public {
+        if (bips > BipsLibrary.BPS_DENOMINATOR) {
+            vm.expectRevert(BipsLibrary.InvalidBips.selector);
+            block.gaslimit.calculatePortion(bips);
+        } else {
+            assertEq(block.gaslimit.calculatePortion(bips), BLOCK_GAS_LIMIT * bips / BipsLibrary.BPS_DENOMINATOR);
+        }
+    }
+
+    function test_gasLimit_100_percent() public view {
+        assertEq(block.gaslimit, block.gaslimit.calculatePortion(10_000));
+    }
+
+    function test_gasLimit_1_percent() public view {
+        // 100 bps = 1%
+        // 1% of 30M is 300K
+        assertEq(BLOCK_GAS_LIMIT / 100, block.gaslimit.calculatePortion(100));
+    }
+
+    function test_gasLimit_1BP() public view {
+        // 1bp is 0.01%
+        // 0.01% of 30M is 300
+        assertEq(BLOCK_GAS_LIMIT / 10000, block.gaslimit.calculatePortion(1));
+    }
+}