the API is working but the coverage is always zero. Did I use it right?

[k1nh00]

hi, I am a user of solidity coverage API. I wrote a node file to collect the coverage of my tests with the methods provided in the API documentation. the code can run smoothly but no coverge is collected. Did I write a wrong logic?

I output the instrumented contract to another file. I started the server and make it serving for 7 seconds to run the tests(triggered by a child process). In the test JS file, the instrumented contract is compiled and the contract is deployed, two transactions are sent. see below:

but the coverage is always zero. I am so confused. HELP ME WITH IT, PLZ.
the result of code running:

[k1nh00]

The instrumented contract is compiled with optimizer off for sure, of course. And the client is a ganache-cli instance.

[cgewecke]

solidity-coverage is no longer supporting ganache-cli. A link to an example of a recent usage of the API can be found here:

#798 (comment)