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The Sym Programming Language
The Sym programming language is designed first and foremost for manipulating expressions. Because it's designed to manipulate expressions, the code in the Sym language is built from Sym expressions rather than text.
Unit Testing
Unit tests provide a way to validate that code functions correctly and to detect errors that might be introduced as code is modified. A Unit Test Module contains a list of unit tests. Unit tests can be run individually, all of the tests in a unit test module can be executed at the same time, or using the Unit Test Runner, unit tests from multiple unit test modules can be run simultaneously.
Unit Test Modules
A Unit Test Module contains a list of unit tests. Unit test modules are created and managed in the Document Explorer.

The Sym Programming Language
The Sym programming language is designed first and foremost for manipulating expressions. Because it's designed to manipulate expressions, the code in the Sym language is built from Sym expressions rather than text.
- Functions
  A function is an object definition that includes clauses its Implementation section.
- Pattern Matching - Overview
  The purpose of a pattern match is to bind an expression to a variable during the execution of code. Most commonly, the expressions that become the values bound variables are the parameters passed into a function call.
- Unit Testing
  Unit tests provide a way to validate that code functions correctly and to detect errors that might be introduced as code is modified. A Unit Test Module contains a list of unit tests. Unit tests can be run individually, all of the tests in a unit test module can be executed at the same time, or using the Unit Test Runner, unit tests from multiple unit test modules can be run simultaneously.
  - Unit Test Modules
    A Unit Test Module contains a list of unit tests. Unit test modules are created and managed in the Document Explorer.
  - Creating and Editing Unit Tests
    Unit tests are created and edited in Unit Test Modules.
  - Executing Unit Tests
    Unit tests can be executed individually. You can also execute a selection or all of the unit tests in a unit test module. The unit test runner provides a way to execute unit tests in multiple Unit Test Modules with a single command.
- Exporters
- The Build Process
  The build process converts the clauses in object definitions into a form that can be executed. The build process also runs the type inferencing process on all of the expressions in the document, which speeds up execution of commands and unit tests. At the end of the build process, the rendering of any open modules is updated to reflect any changes to the renderings in object definitions.

Unit Test Modules

A Unit Test Module contains a list of unit tests. Unit test modules are created and managed in the Document Explorer.

Creating a Unit Test Module

A Unit Test Module is a module that contains a list of unit tests. Unit test modules are created in the Document Explorer. A Unit Test Module can be added to the document or to any of the libraries loaded into the document. Any number of unit tests can be added to a module.

To create a Unit Test Module:

From the Document Explorer, right-click the location under which the module should appear. For example, to have the module appear in the current document only, right-click the Objects node. To add the module to a library, right-click the library name or any folder within the library.
Select Add unit tests from the context menu.
Type a name for the module and press Enter. The new Unit Test Module will open.
Save the changes to the library.

Highlighting unit tests

You can highlight and cut/copy/paste multiple tests using either keystrokes or the mouse.

Arrow keys:

Ctrl + Up arrow or Ctrl + Down arrow clears the current highlight and moves the highlight to the previous or next unit test

Shift + Up arrow or Shift + Down arrow moves the highlight to the previous or next unit test highlights all tests between the starting point and the currently active highlight.

Mouse:

Shift + Click highlights the range from the first item highlighted to the clicked item. All of the items from first item to last item are highlighted.

You can also use Ctrl + Click to highlight additional unit tests. Ctrl + Click adds the unit test under the mouse click to the list of highlighted unit tests if it isn't already highlighted.

Cut, copy, delete, and paste on multiple unit tests all work in the usual way. You can also copy or cut a list of unit tests and paste them into a document section (and vice versa).