Merge pull request #2458 from ethereum/assert-lib-doc

Assert library documentation added

docs/assert_library.md

@@ -0,0 +1,95 @@
+Remix Assert Library
+====================
+
+* [Assert.ok(value[, message])](#assert-ok-value-message)
+* [Assert.equal(actual, expected[, message])](#assert-equal-actual-expected-message)
+* [Assert.notEqual(actual, expected[, message])](#assert-notequal-actual-expected-message)
+* [Assert.greaterThan(value1, value2[, message])](#assert-greaterthan-value1-value2-message)
+* [Assert.lesserThan(value1, value2[, message])](#assert-lesserthan-value1-value2-message)
+
+
+## Assert
+
+### Assert.ok(value[, message])
+* `value`: \<bool\>
+* `message`: \<string\>
+
+Tests if value is truthy. `message` is returned in case of failure.
+
+Examples:
+```
+Assert.ok(true);
+// OK
+Assert.ok(false, "it\'s false");
+// error: it's false
+```
+
+### Assert.equal(actual, expected[, message])
+* `actual`: \<uint | int | bool | address | bytes32 | string\>
+* `expected`: \<uint | int | bool | address | bytes32 | string\>
+* `message`: \<string\>
+
+Tests if `actual` & `expected` values are same. `message` is returned in case of failure.
+
+Examples:
+```
+Assert.equal(string("a"), "a");
+// OK
+Assert.equal(uint(100), 100);
+// OK
+foo.set(200)
+Assert.equal(foo.get(), 200);
+// OK
+Assert.equal(foo.get(), 100, "value should be 200");
+// error: value should be 200
+```
+
+### Assert.notEqual(actual, expected[, message])
+* `actual`: \<uint | int | bool | address | bytes32 | string\>
+* `expected`: \<uint | int | bool | address | bytes32 | string\>
+* `message`: \<string\>
+
+Tests if `actual` & `expected` values are not same. `message` is returned in case of failure.
+
+Examples:
+```
+Assert.notEqual(string("a"), "b");
+// OK
+foo.set(200)
+Assert.notEqual(foo.get(), 200, "value should not be 200");
+// error: value should not be 200
+```
+
+### Assert.greaterThan(value1, value2[, message])
+* `value1`: \<uint | int\>
+* `value2`: \<uint | int\>
+* `message`: \<string\>
+
+Tests if `value1` is greater than `value2`. `message` is returned in case of failure.
+
+Examples:
+```
+Assert.greaterThan(uint(2), uint(1));
+// OK
+Assert.greaterThan(uint(-2), uint(1));
+// OK
+Assert.greaterThan(int(2), int(1));
+// OK
+Assert.greaterThan(int(-2), int(-1), "-2 is not greater than -1");
+// error: -2 is not greater than -1
+```
+
+### Assert.lesserThan(value1, value2[, message])
+* `value1`: \<uint | int\>
+* `value2`: \<uint | int\>
+* `message`: \<string\>
+
+Tests if `value1` is lesser than `value2`. `message` is returned in case of failure.
+
+Examples:
+```
+Assert.lesserThan(int(-2), int(-1));
+// OK
+Assert.lesserThan(int(2), int(1), "2 is not lesser than 1");
+// error: 2 is not greater than 1
+```

docs/index.rst

@@ -65,6 +65,7 @@ Useful links:
    remix_commands
    remixd
    unittesting
+   assert_library
    
 .. toctree::
    :maxdepth: 2

docs/unittesting.md

@@ -3,49 +3,46 @@ Unit Testing
 
 Click the
 ![double check](images/a-user-testing-icon.png)
- icon to get to the "Solidity Unit Testing" plugin. If you don't see this icon, go to the plugin manager (by click the ![plug](images/a-plug.png) icon) and load up the unit testing plugin.
+ icon to get to the "Solidity Unit Testing" plugin. 
+ 
+ If you haven't used this plugin before and are not seeing `double check` icon, you have to activate it from Remix plugin manager.
+ 
+Go to the plugin manager (by click the ![plug](images/a-plug.png) icon) and load up the unit testing plugin.
 
 ![](images/a-unit-testing-from-pm.png)
 
+Now `double check` icon will appear on the left side icon bar. Clicking on icon will load the unit testing module in the side panel.
+
 ![](images/a-unit-testing-feature.png)
 
-Generating Test File
+Generate Test File
 ------------------
-Click the button "Generate test file" to create a new solidity file in the current folder.
+Click the button `Generate test file` to create a new solidity file in the current folder suffixed with `_test`. This file contains the minimum you need for running unit testing.
-This create a new solidity file suffixed with `_test`.
+
-This file contains the minimum you need for running unit testing.
+Write Tests
+-----------
+Write tests to check the functionality of your contract. Remix injects a built-in `assert` library which can be used for testing. Visit the library documentation [here](./assert_library).
 
-Running Tests
+Apart from this, Remix allows usage of some special functions to make testing more structural. They are:
+
+* `beforeEach()` - Runs before each test
+* `beforeAll()` - Runs before all tests
+* `afterEach()` - Runs after each test
+* `afterAll()` - Runs after all tests
+
+To get started, see [this](https://github.com/ethereum/remix/blob/master/remix-tests/tests/examples_4/SafeMath_test.sol) for sample implementation.
+
+Run Tests
 ------------------
 
 Click the button "Run tests" to executes all tests whose box has been checked below (by default all). The execution is run in a separate environment and the result is displayed below.
 
 ![](images/a-unit-testing-run-result.png)
 
-Here is a list of functions and their supported types that you can use to write your testcases:
-
-```eval_rst
-+ -----------------------+--------------------------------------------------------+
-| Available functions    | Supported types                                        |
-+========================+========================================================+
-| `Assert.ok()`          | `bool`                                                 |
-+------------------------+--------------------------------------------------------+
-| `Assert.equal()`       | `uint`, `int`, `bool`, `address`, `bytes32`, `string`  |
-+------------------------+--------------------------------------------------------+
-| `Assert.notEqual()`    | `uint`, `int`, `bool`, `address`, `bytes32`, `string`  |
-+------------------------+--------------------------------------------------------+
-| `Assert.greaterThan()` | `uint`, `int`                                          |
-+------------------------+--------------------------------------------------------+
-| `Assert.lesserThan()`  | `uint`, `int`                                          |
-+------------------------+--------------------------------------------------------+
-```
-
-Click [here](https://github.com/ethereum/remix/blob/master/remix-tests/tests/examples_4/SafeMath_test.sol) for a test file example
-
 Continuous integration
 ----------------------
 
-remix-tests is also a CLI, it can be used in a continuous integration environement which support node.js.
+remix-tests is also a CLI, it can be used in a continuous integration environment which support node.js.
-Please find more information in the [remix-test repository](https://github.com/ethereum/remix/tree/master/remix-tests)
+Please find more information in the [remix-tests repository](https://github.com/ethereum/remix/tree/master/remix-tests)
 
 See also: 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) that uses remix-tests for continuous integration testing.