fix: improve the test

bgd-labs · Aug 8, 2024 · 5f9c5a9 · 5f9c5a9
1 parent 9436581
commit 5f9c5a9
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/tests/periphery/static-a-token/StaticATokenLM.t.sol b/tests/periphery/static-a-token/StaticATokenLM.t.sol
@@ -69,7 +69,12 @@ contract StaticATokenLMTest is BaseTest {
     );
     uint256 stataPrice = uint256(staticATokenLM.latestAnswer());
     uint256 underlyingPrice = contracts.aaveOracle.getAssetPrice(UNDERLYING);
-    assertEq(stataPrice, (underlyingPrice * liquidityIndex) / 1e27);
+    uint256 expectedStataPrice = (underlyingPrice * liquidityIndex) / 1e27;
+    assertEq(stataPrice, expectedStataPrice);
+
+    // reverse the math to ensure precision loss is within bounds
+    uint256 reversedUnderlying = (stataPrice * 1e27) / liquidityIndex;
+    assertApproxEqAbs(underlyingPrice, reversedUnderlying, 1);
   }
 
   function test_convertersAndPreviews() public view {