add test & yarn format

contracts/core/index-fund/IndexFund.sol

@@ -262,7 +262,10 @@ contract IndexFund is IIndexFund, Storage, OwnableUpgradeable, ReentrancyGuard {
     // tokens must be transfered from the sender to this contract
     IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
     // we give allowance to accounts contract
-    IERC20(token).safeApprove(registrarConfig.accountsContract, amount);
+    require(
+      IERC20(token).approve(registrarConfig.accountsContract, amount),
+      "Approval needed for Accounts Contract to spend"
+    );
 
     if (fundId != 0) {
       // Depositor has chosen a specific fund to send tokens to. Send 100% to that fund.
@@ -305,7 +308,7 @@ contract IndexFund is IIndexFund, Storage, OwnableUpgradeable, ReentrancyGuard {
         );
       } else if (state.config.fundRotation == 0 && state.config.fundingGoal > 0) {
         // Fundraising Goal-based rotation of Funds
-        // Check if funding goal is met for current active fund and rotate funds 
+        // Check if funding goal is met for current active fund and rotate funds
         // until all donated tokens are depleted
         uint256 loopDonation = 0;
         uint256 goalLeftover = state.config.fundingGoal - state.roundDonations;

test/core/IndexFund.ts

@@ -437,6 +437,12 @@ describe("IndexFund", function () {
       );
     });
 
+    it("reverts when amount donated, on a per endowment-basis for a fund, would be < 100 units", async function () {
+      expect(indexFund.depositERC20(1, token1.address, 100)).to.be.revertedWith(
+        "Amount must be greater than 100 units per endowment"
+      );
+    });
+
     it("reverts when target fund is expired", async function () {
       expect(indexFund.depositERC20(2, token1.address, 100)).to.be.revertedWith("Fund expired");
     });
@@ -496,9 +502,11 @@ describe("IndexFund", function () {
       expect(
         await indexFund.depositERC20(4, token1.address, 500, {
           gasPrice: 3000,
-          gasLimit: 10000000
+          gasLimit: 10000000,
         })
-      ).to.emit(indexFund, "DonationProcessed").withArgs(4);
+      )
+        .to.emit(indexFund, "DonationProcessed")
+        .withArgs(4);
     });
 
     it("passes for an active fund donation(amount-based rotation), amount > zero & token is valid", async function () {
@@ -511,11 +519,14 @@ describe("IndexFund", function () {
         .to.emit("FundCreated")
         .withArgs(5);
 
-      expect(await indexFund.depositERC20(0, token1.address, 10000, {
+      expect(
+        await indexFund.depositERC20(0, token1.address, 10000, {
           gasPrice: 3000,
-          gasLimit: 10000000
+          gasLimit: 10000000,
         })
-      ).to.emit(indeFund, "DonationProcessed").withArgs(4);
+      )
+        .to.emit(indexFund, "DonationProcessed")
+        .withArgs(4);
     });
   });
 });