Difference between statement and line coverage in jest

Question

Can anyone explains me the difference between line coverage and statement coverage in jest. When I ran my coverage report I got a different line coverage percentage compared to statement.

Anglesey

what is the unit coverage in this output? is this the number of lines covered in this repository which is 45.45 % here? – Sarraceniaceous

Answer 1

if you have a line of code that says var x= 10; console.log(x); that's one line and 2 statements.

Statement coverage has each statement in the program been executed.

Line coverage has each executable line in the source file been executed.

Patella

This still doesn't make sense. The programming language is free-form. – Centaury

Answer 2

There can be two statements in one line, but only one statement gets executed

if ({} + [] == 0) || exit(1)

exit(1) will never occur, because the first statement is always true, and the || operator 'short circuits' the line as soon as the first true is found.

Malvasia