To extend Microsoft Visual Studio and its .NET productivity offerings, JetBrains, a provider of productivity-enhancing development tools, introduced dotCover, a new code-coverage tool for .NET developers, and dotTrace 4 Performance, a reworked version of its .NET profiling tool.

dotCover, an extension to Visual Studio, highlights code that was not covered during a unit test and detects which unit tests covered a particular area in the code. This helps .NET developers ensure that every line that should be covered in a unit test is covered, according to the Prague-based company. The tool also aggregates data from multiple coverage sessions, merges collected snapshots and generates XML-based code-coverage reports.

Working within Visual Studio 2005, 2008 or 2010, dotCover analyzes statement-level code coverage in .NET Framework and Silverlight applications, and it integrates with JetBrains’ ReSharper unit testing tool set.

dotCover also provides a console utility, enabling users to use it with a continuous integration server.

“We felt it would be fitting to give .NET developers a tool to help them see how successful they are in their unit-testing practices,” said Oleg Stepanov, .NET division project lead for JetBrains. “[dotCover enables] developers to instantly see any lapses in code coverage, and at the same time integrate into corporate development and reporting workflow,” he added.

In addition to dotCover, dotTrace 4 Performance is an upgrade from JetBrains’ .NET profiler offering. After being an all-in-one memory and performance profiler, dotTrace splits into two products, the company said. dotTrace 4 Performance is the .NET performance tool and will be followed by the introduction of dotTrace 4 Memory in several months.  

This reworked tool helps .NET developers get accurate information on performance bottlenecks in a variety of .NET applications, including those built on .NET Framework 4, .NET Compact Framework 3.5 and Silverlight 4.

With dotTrace 4, users can profile complex desktop and server applications as well as remote applications. They can also assess how removing a particular bottleneck would affect the overall application performance, the company said.  

dotCover is offered now until Jan. 1, 2011, at an introductory price of US$49 per personal license or $99 per commercial license. All licenses include one year of free upgrades and technical support.  

dotTrace 4 Performance comes in Standard and Professional editions. Commercial pricing starts at $399. Users can also purchase a bundle of dotTrace 4 Performance and dotTrace 3.5 Memory, a memory profiler with support for the latest .NET Framework, at a discounted price. Those with licenses purchased on or after Dec. 17, 2008, can be upgraded to dotTrace 4 free of charge.