feat: improving and cleaning BMath tree

test/unit/BMath.t.sol

@@ -113,15 +113,6 @@ contract BMathTest is Test, BConst {
     bMath.calcOutGivenIn(balanceIn, weightIn, balanceOut, weightOut, amountIn, _swapFee);
   }
 
-  function test_CalcOutGivenInWhenSwapFeeEqualsBONE() external virtual {
-    uint256 _swapFee = BONE;
-
-    // it should return zero
-    uint256 _amountOut = bMath.calcOutGivenIn(balanceIn, weightIn, balanceOut, weightOut, amountIn, _swapFee);
-
-    assertEq(_amountOut, 0);
-  }
-
   function test_CalcOutGivenInRevertWhen_TokenAmountInTooBig(uint256 _amountIn) external {
     _amountIn = bound(_amountIn, type(uint256).max / (BONE - swapFee) + 1, type(uint256).max);
 
@@ -154,6 +145,15 @@ contract BMathTest is Test, BConst {
     bMath.calcOutGivenIn(_balanceIn, weightIn, balanceOut, weightOut, amountIn, _swapFee);
   }
 
+  function test_CalcOutGivenInWhenSwapFeeEqualsBONE() external virtual {
+    uint256 _swapFee = BONE;
+
+    // it should return zero
+    uint256 _amountOut = bMath.calcOutGivenIn(balanceIn, weightIn, balanceOut, weightOut, amountIn, _swapFee);
+
+    assertEq(_amountOut, 0);
+  }
+
   function test_CalcOutGivenInWhenTokenWeightInIsZero() external virtual {
     uint256 _weightIn = 0;
 
@@ -477,7 +477,7 @@ contract BMathTest is Test, BConst {
     bMath.calcPoolInGivenSingleOut(_balanceOut, weightOut, poolSupply, totalWeight, amountOut, swapFee);
   }
 
-  function test_CalcPoolInGivenSingleOutRevertWhen_SwapFeeIs1AndTokenWeightOutIsZero() external {
+  function test_CalcPoolInGivenSingleOutRevertWhen_SwapFeeEqualsBONEAndTokenWeightOutIsZero() external {
     uint256 _swapFee = BONE;
     uint256 _weightOut = 0;
 
@@ -488,6 +488,14 @@ contract BMathTest is Test, BConst {
     bMath.calcPoolInGivenSingleOut(balanceOut, _weightOut, poolSupply, totalWeight, amountOut, _swapFee);
   }
 
+  function test_CalcPoolInGivenSingleOutRevertWhen_SwapFeeGreaterThanBONE() external {
+    // it should revert
+    //     subtraction underflow
+    vm.expectRevert(BNum.BNum_SubUnderflow.selector);
+
+    bMath.calcPoolInGivenSingleOut(balanceOut, weightOut, poolSupply, totalWeight, amountOut, BONE + 1);
+  }
+
   function test_CalcPoolInGivenSingleOutWhenTokenAmountOutIsZero() external virtual {
     uint256 _amountOut = 0;
 

test/unit/BMath.tree

@@ -5,9 +5,9 @@ BMathTest::calcSpotPrice
 │   └── it should revert // division by zero
 ├── when weighted token balance out is zero
 │   └── it should revert // division by zero
-├── when swapFee greater than BONE
+├── when swap fee greater than BONE
 │   └── it should revert // subtraction underflow
-├── when swapFee equals BONE
+├── when swap fee equals BONE
 │   └── it should revert // division by zero
 ├── when swap fee is zero
 │   └── it should return correct value
@@ -21,14 +21,14 @@ BMathTest::calcOutGivenIn
 │   └── it should revert // division by zero
 ├── when swap fee greater than BONE
 │   └── it should revert // subtraction underflow
-├── when swap fee equals BONE
-│   └── it should return zero
 ├── when token amount in too big
 │   └── it should revert // ai * (1 - sf) > uint256 max
 ├── when token balance in and amount in are zero
-│   └── it should revert // bi + (ai * (1 - swapFee)) = 0
+│   └── it should revert // bi + (ai * (1 - sf)) = 0
 ├── when token balance in is zero and swap fee equals BONE
-│   └── it should revert // bi + (ai * (1 - swapFee)) = 0
+│   └── it should revert // bi + (ai * (1 - sf)) = 0
+├── when swap fee equals BONE
+│   └── it should return zero
 ├── when token weight in is zero
 │   └── it should return zero
 ├── when token weights are equal
@@ -53,9 +53,9 @@ BMathTest::calcInGivenOut
 │   └── it should revert // subtraction underflow
 ├── when token amount out equals token balance out
 │   └── it should revert // division by zero
-├── when swapFee greater than BONE
+├── when swap fee greater than BONE
 │   └── it should revert // subtraction underflow
-├── when swapFee equals BONE
+├── when swap fee equals BONE
 │   └── it should revert // division by zero
 ├── when token weight out is zero
 │   └── it should return zero
@@ -121,7 +121,7 @@ BMathTest::calcSingleOutGivenPoolIn
 BMathTest::calcPoolInGivenSingleOut
 ├── when token balance out is zero
 │   └── it should revert // subtraction underflow
-├── when swap fee is 1 and token weight out is zero
+├── when swap fee greater than BONE
 │   └── it should revert // division by zero
 ├── when token amount out is zero
 │   └── it should return zero