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205 lines
7.8 KiB
205 lines
7.8 KiB
## Remix-Tests
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[](https://www.npmjs.com/package/remix-tests)
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[](https://www.npmjs.com/package/remix-tests)
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[](https://www.npmjs.com/package/remix-tests)
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[](https://github.com/ethereum/remix/tree/master/remix-tests)
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[](https://github.com/ethereum/remix/issues)
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`remix-tests` is a tool to test Solidity smart contracts. It works underneath Remix IDE plugin "Solidity Unit Testing" which is used to write and run test cases for a contract. Tests are written in Solidity itself. `remix-tests` can be used as CLI and a library too.
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### Installation
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As a dev dependency:
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`npm install --save-dev remix-tests`
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As a global NPM module to use as CLI:
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`npm -g install remix-tests`
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### Test structure
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remix-tests provides and injects a built-in assert library for testing purpose.
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#### Assert library
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| Available functions | Supported types |
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| ------------- | ------------- |
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| `Assert.ok()` | `bool` |
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| `Assert.equal()` | `uint`, `int`, `bool`, `address`, `bytes32`, `string` |
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| `Assert.notEqual()` | `uint`, `int`, `bool`, `address`, `bytes32`, `string` |
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| `Assert.greaterThan()` | `uint`, `int` |
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| `Assert.lesserThan()` | `uint`, `int` |
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#### Available special functions:
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Apart from above, library provides some special functions as:
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* `beforeEach()` - runs before each test
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* `beforeAll()` - runs before all tests
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* `afterEach()` - runs after each test
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* `afterAll()` - runs after all tests
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#### Use a different sender `msg.sender`
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It is quite common that a contract need to be tested in different situation.
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Especially being able to set before hand the sender account (`msg.sender`) used for a specific tests suite enable quite a lot a new test use cases.
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please checkout this [test contract](https://github.com/ethereum/remix/blob/master/remix-tests/tests/various_sender/sender_test.sol) for an example.
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Note that `TestsAccounts` is filled with all the accounts available in `web3.eth.accounts()`.
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### How to use
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#### As command line interface
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* To run all files inside `examples` directory
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```
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$ remix-tests examples/
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```
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* To run single test file named `simple_storage_test.sol` inside `examples` directory
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```
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$ remix-tests examples/simple_storage_test.sol
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```
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**NOTE:** remix-tests will assume that name of tests file ends with `"_test.sol"`. e.g `simple_storage_test.sol`
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**Example:**
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Consider for a simple storage contract named `simple_storage.sol`:
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```Javascript
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pragma solidity >=0.4.22 <0.7.0;
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contract SimpleStorage {
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uint public storedData;
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constructor() public {
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storedData = 100;
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}
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function set(uint x) public {
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storedData = x;
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}
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function get() public view returns (uint retVal) {
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return storedData;
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}
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}
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```
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test file `simple_storage_test.sol` can be as:
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```Javascript
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pragma solidity >=0.4.22 <0.7.0;
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import "remix_tests.sol"; // injected by remix-tests
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import "./simple_storage.sol";
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contract MyTest {
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SimpleStorage foo;
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function beforeEach() public {
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foo = new SimpleStorage();
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}
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function initialValueShouldBe100() public returns (bool) {
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return Assert.equal(foo.get(), 100, "initial value is not correct");
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}
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function valueIsSet200() public returns (bool) {
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foo.set(200);
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return Assert.equal(foo.get(), 200, "value is not 200");
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}
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function valueIsNotSet200() public returns (bool) {
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return Assert.notEqual(foo.get(), 200, "value is 200");
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}
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}
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```
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Running `simple_storage_test.sol` file will output as:
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```
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◼ MyTest
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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✓ Initial value should be100
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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✓ Value is set200
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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[19:15:02] payload method is eth_gasPrice
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[19:15:02] payload method is eth_sendTransaction
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[19:15:02] payload method is eth_getTransactionReceipt
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✓ Value is not set200
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```
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:point_right: remix-test can also be used for continuous integration testing. See example [Su Squares contract](https://github.com/su-squares/ethereum-contract/tree/e542f37d4f8f6c7b07d90a6554424268384a4186) and [Travis build](https://travis-ci.org/su-squares/ethereum-contract/builds/446186067)
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#### As a Library for development
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Import library:
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```Javascript
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const RemixTests = require('remix-tests');
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```
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Run a single test object:
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```Javascript
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remixTests.runTest (testName: string, testObject: any, contractDetails: CompiledContract, fileAST: AstNode, opts: Options, testCallback: TestCbInterface, resultsCallback: ResultCbInterface)
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```
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<em>Params:-</em>
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1. `testName` - Name of the test
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2. `testObject` - Web3 1.0 contract instance of the test
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3. `contractDetails` - Contract details
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4. `fileAST` - AST of test file
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5. `opts` - Custom options
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6. `testCallback(object)` - Called each time there is a test event. 3 possible type of objects:
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* `{ type: 'contract', value: '<TestName>', filename: '<test_filename.sol>' }`
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* `{ type: 'testPass', value: '<name of testing function>', time: <time taken>, context: '<TestName>'}`
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* `{ type: 'testFailure', value: '<name of testing function>', time: <time taken>, context: '<TestName>', errMsg: '<message in the Assert>' }`
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7. `resultsCallback(object)` - Callback with test results
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* `passingNum` - number of passing tests
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* `failureNum` - number of failing tests
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* `timePassed` - time it took for all the tests to run (in seconds)
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Running a set of tests given the sourcecode:
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```Javascript
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remixTests.runTestSources(contractSources: SrcIfc, versionUrl: string, usingWorker: boolean, testCallback: Function, resultCallback: Function, finalCallback: any, importFileCb: Function, opts: Options);
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```
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<em>Params:-</em>
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1. `contractSources` - Contract sources
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2. `versionUrl` - URL of solc compiler to load
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3. `usingWorker` - Set `true` if compiler should be loaded using web-worker
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4. `testCallback(object)` - Called each time there is a test event. 3 possible type of objects:
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* `{ type: 'contract', value: '<TestName>', filename: '<test_filename.sol>' }`
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* `{ type: 'testPass', value: '<name of testing function>', time: <time taken>, context: '<TestName>'}`
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* `{ type: 'testFailure', value: '<name of testing function>', time: <time taken>, context: '<TestName>', errMsg: '<message in the Assert>' }`
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5. `resultCallback(err, object)` - Callback with test results
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* `passingNum` - number of passing tests
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* `failureNum` - number of failing tests
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* `timePassed` - time it took for all the tests to run (in seconds)
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6. `finalCallback(err)` - called when all tests finish running.
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7. `importCb(url, cb)` - Callback to resolve imported files
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8. `opts` - Custom options
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For more details, see parameters' type definitions [here](https://github.com/ethereum/remix/blob/master/remix-tests/src/types.ts).
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## Contribute
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Please feel free to open an issue or a pull request.
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In case you want to add a code, do have a look to our contribution guidelnes [here](https://github.com/ethereum/remix/blob/master/CONTRIBUTING.md). Reach us in [Gitter](https://gitter.im/ethereum/remix) in case of any queries.
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## License
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[MIT](LICENSE.md) © 2018 Remix Team
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