VS2008 Code Coverage - can't find “not covered blocks”

Question

I'm running VS2008's Code Coverage against a unit-tested DLL that I'm developing. For some of the functions it claims that 2 blocks are not covered and 50 or so are. When I view the function with the VS2008 highlighting it can't find the uncovered blocks.

The highlighting appears to work with some functions though as it correctly shows a different color for uncovered blocks. Seems to be inconsistent.

Is this a bug or PIBKAC? If the latter, what am I doing wrong?

Answer 1

I've seen some issues where the code coverage analyzer has trouble with closing braces on try/catch blocks. When I see these sorts of things, I just don't worry about it -- as long as I can see that the actual code gets covered.

[EDIT] I'd second the TestDriven.NET recommendation. I like it for the right-click test menus that let me easily run individual tests and I also use NCover rather than the built-in coverage -- mostly because it opens in another window and doesn't color the text in my main editor.

Answer 2

Just a suggestion, try the code coverage tool from TestDriven.Net and compare the results.

Answer 3

Make sure to differentiate between covered blocks and partly covered blocks. The color is similar in the default settings, if i recall correctly.

Answer 4

I had a situation in which a switch statement that chose a different path for every member of an enumeration didn't have a "default" path. You could spot the not-completely-covered block by the parens of the switch statement not being highlighted.