Update coverage report documentation in mdbook

docs/src/project_configuration/overview.md

@@ -43,7 +43,7 @@ value to `10_000` or `100_000` depending on the use case. You can learn more abo
 Updating the corpus directory is optional but recommended. The corpus directory determines where corpus items should be
 stored on disk. A corpus item is a sequence of transactions that increased `medusa`'s coverage of the system. Thus, these
 corpus items are valuable to store so that they can be re-used for the next fuzzing campaign. Additionally, the directory
-will also hold [coverage reports](../coverage_reports.md) which is a valuable tool for debugging and validation. For most cases, you may set
+will also hold [coverage reports](../testing/coverage_reports.md) which is a valuable tool for debugging and validation. For most cases, you may set
 `corpusDirectory`'s value to "corpus". This will create a `corpus/` directory in the same directory as the `medusa.json`
 file.
 You can learn more about this option [here](./fuzzing_config.md#corpusdirectory).

docs/src/testing/coverage_reports.md

@@ -1 +1,43 @@
 ## Coverage Reports
+
+### Generating HTML Report from LCOV
+
+Enable coverage reporting by setting the `corpusDirectory` key in the configuration file and setting the `coverageReports` key to `["lcov", "html"]`.
+
+```json
+{
+  "corpusDirectory": "corpus",
+  "coverageReports": ["lcov", "html"]
+}
+```
+
+### Install lcov and genhtml
+
+Linux:
+
+```bash
+apt-get install lcov
+```
+
+MacOS:
+
+```bash
+brew install lcov
+```
+
+### Generate LCOV Report
+
+```bash
+genhtml corpus/coverage/lcov.info --output-dir corpus --rc derive_function_end_line=0
+```
+
+> [!WARNING]  
+> ** The `derive_function_end_line` flag is required to prevent the `genhtml` tool from crashing when processing the Solidity source code. **
+
+Open the `corpus/index.html` file in your browser or follow the steps to use VSCode below.
+
+### View Coverage Report in VSCode with Coverage Gutters
+
+Install the [Coverage Gutters](https://marketplace.visualstudio.com/items?itemName=ryanluker.vscode-coverage-gutters) extension.
+
+Then, right click in a project file and select `Coverage Gutters: Display Coverage`.