How to exclude models, enums, mock files from coverage report?

This is the karma configuration for predecessors I'm using but it's still exporting code converge for all files including models, enums and mock files.

```
preprocessors: {
// source files, that you wanna generate coverage for
// do not include tests or libraries
// (these files will be instrumented by Istanbul)
'../src/**/!(*spec|*model|*enum|*mock).js': ['coverage']
},
```
Please help me If I've configured karma wrongly?

Start with the Karma configuration's preprocessors pattern and the coverage plugin documentation to determine how source files are selected for instrumentation. Confirm the configuration excludes models, enums, mocks, and spec files from the exported coverage report.

Written by the indexing model from the issue text.