test: add update_rewards same epoch flow

src/flow_test/flow_ideas.md

@@ -5,7 +5,6 @@
 - member change balance and test with view of current epoch balance
 
 ## `update_rewards`
-- update rewards for 2 different blocks in the same epoch - should be same rewards.
 - Change epoch len in blocks - rewards should be changed.
 - disable_rewards = true, advance block, disable_rewards = false, advance block, disable_rewards = true, test rewards.
 - update rewards for some different blocks in the same epoch, test rewards of pool member.

src/flow_test/test.cairo

@@ -3721,10 +3721,7 @@ fn update_rewards_staker_intent_flow_test() {
     system.update_rewards(:staker, disable_rewards: false);
     let staker_rewards = system.staker_claim_rewards(:staker);
     let (expected_rewards, _) = calculate_staker_strk_rewards_with_balances_v3(
-        amount_own: stake_amount,
-        pool_amount: Zero::zero(),
-        :commission,
-        :minting_curve_contract,
+        amount_own: stake_amount, pool_amount: Zero::zero(), :commission, :minting_curve_contract,
     );
     assert!(staker_rewards == expected_rewards);
 
@@ -3737,3 +3734,33 @@ fn update_rewards_staker_intent_flow_test() {
     let result = system.safe_update_rewards(:staker, disable_rewards: false);
     assert_panic_with_error(:result, expected_error: StakingError::INVALID_STAKER.describe());
 }
+
+/// Flow:
+/// Staker stake.
+/// Start consensus rewards.
+/// update_rewards - test rewards.
+/// Advance block.
+/// update_rewards - test rewards are the same.
+#[test]
+fn update_rewards_same_epoch_flow_test() {
+    let cfg: StakingInitConfig = Default::default();
+    let mut system = SystemConfigTrait::basic_stake_flow_cfg(:cfg).deploy();
+    let minting_curve_contract = system.minting_curve.address;
+    let stake_amount = system.staking.get_min_stake();
+    let staker = system.new_staker(amount: stake_amount);
+    let commission = 200;
+    system.stake(:staker, amount: stake_amount, pool_enabled: false, :commission);
+    system.start_consensus_rewards();
+
+    system.update_rewards(:staker, disable_rewards: false);
+    let staker_rewards = system.staker_claim_rewards(:staker);
+    let (expected_rewards, _) = calculate_staker_strk_rewards_with_balances_v3(
+        amount_own: stake_amount, pool_amount: Zero::zero(), :commission, :minting_curve_contract,
+    );
+    assert!(staker_rewards == expected_rewards);
+
+    advance_blocks(blocks: 1, block_duration: AVG_BLOCK_DURATION);
+    system.update_rewards(:staker, disable_rewards: false);
+    let staker_rewards = system.staker_claim_rewards(:staker);
+    assert!(staker_rewards == expected_rewards);
+}