An entrance test should try both the correct key and an unrelated key.
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A valid counter call, step by stepStep 1 / 4
This example begins with count zero and a request to call increment(). No real contract is deployed.
This example begins with count zero and a request to call increment(). No real contract is deployed.Execution follows the code’s input and permission rules. A website button is not the access-control mechanism.The function reads zero, calculates zero plus one, and writes one to persistent storage.The accepted state contains count one. Later reads can inspect it. Events are emitted only if the code implements them.
Animated local teaching model. No wallet, RPC or live blockchain data. Some labels and hashes are abbreviated for readability.
Name the authorized role
For PracticeCounter, the deployment account is the owner. Keep that identity explicit in the test rather than relying on a runner’s unnamed default account.
Test the allowed path
The owner should be able to increment under the example’s rules. A test suite with only rejection tests can miss a function that blocks everyone.
Test an unrelated caller
A different local account should fail with the intended error. Assert that count remains unchanged after the rejected action.
Include role transitions where present
For mutable-role designs, test former owners, pending owners and transfer completion. PracticeCounter uses an immutable owner, so those transitions are not part of this toy interface.
Define the test
owner call → success and increment
unrelated account call → NotOwner(account)
after rejection → count unchanged
Test plans are framework-neutral unless labeled as complete Solidity or JavaScript. Use a local test environment and no real funds.
QUICK CHECK · NO PRESSURE
Should a rejected unauthorized call leave count changed?
Its rejected execution should not apply the protected increment.