[Eclipse] EclEmma - Java Code Coverage for Eclipse

In computer science, code coverage is a measure used to describe the degree to which the source code of a program is executed when a particular test suite runs. A program with high code coverage, measured as a percentage, has had more of its source code executed during testing which suggests it has a lower chance of containing undetected software bugs compared to a program with low code coverage.

EclEmma is a free Java code coverage tool for Eclipse, it brings code coverage analysis directly into the Eclipse workbench.

Prerequisite
Prepare your unit test programs:

Execution
After you installed EclEmma Plugin, you can run  Coverage as => JUnit Test

Then you can get the converge analysis report

Summary
While 100% code coverage is nice, it's not a good metric to blindly follow. 100% code coverage doesn't tell you anything other than you have tests that execute all your lines of code. Your code can still have bugs if that covered code does the wrong thing or doesn't do enough. 


Reference
[1] https://en.wikipedia.org/wiki/Code_coverage
[2] http://www.eclemma.org/
[3] https://stackoverflow.com/questions/26360245/try-with-resource-unit-test-coverage