Request additional parameters for test coverage metrics

[kldaji]

There are various criteria for measuring test coverage, e.g. Instruction, Branch, Line, etc.

I think it only provides instruction at the moment, but it would be good to receive various criteria such as Line and Branch as parameters and use them customarily!

[instrap]

JaCoCo XML report offers extensive details for INSTRUCTION and BRANCH, straight away.

For instance,

<sourcefile name="MainActivity.kt">
    <line cb="0" ci="0" mb="0" mi="3" nr="10" />
    <line cb="0" ci="0" mb="0" mi="3" nr="13" />
    <line cb="0" ci="0" mb="0" mi="3" nr="14" />
    <line cb="0" ci="0" mb="0" mi="2" nr="17" />
    <line cb="0" ci="0" mb="0" mi="10" nr="18" />
    <line cb="0" ci="0" mb="0" mi="14" nr="19" />
    <line cb="0" ci="0" mb="0" mi="14" nr="20" />
    <line cb="0" ci="0" mb="0" mi="4" nr="23" />
    <line cb="0" ci="0" mb="0" mi="14" nr="24" />
    <line cb="0" ci="0" mb="0" mi="14" nr="25" />
    <line cb="0" ci="0" mb="0" mi="4" nr="28" />
    <line cb="0" ci="0" mb="0" mi="14" nr="29" />
    <line cb="0" ci="0" mb="0" mi="1" nr="30" />
    <counter covered="0" missed="100" type="INSTRUCTION" />
    <counter covered="0" missed="13" type="LINE" />
    <counter covered="0" missed="3" type="COMPLEXITY" />
    <counter covered="0" missed="3" type="METHOD" />
    <counter covered="0" missed="1" type="CLASS" />
</sourcefile>

Here for every line we get the missed/covered INSTRUCTION & BRANCH. For the other metrics like LINE, COMPLEXITY, METHOD, CLASS we don't have this extensive detail per line, but instead we just get these per file. We could get extensive details for these metrics from <method> like

<method name="&lt;init&gt;" desc="()V" line="3">
    <counter covered="0" missed="3" type="INSTRUCTION" />
    <counter covered="0" missed="1" type="LINE" />
    <counter covered="0" missed="1" type="COMPLEXITY" />
    <counter covered="0" missed="1" type="METHOD" />
</method>

So this is doable, but not anytime soon. We will first focus only adding BRANCH coverage since that's straight forward, and then revisit this one.