docs: polish coverage doc (#569)

Author: 9aoy

website/docs/en/config/test/coverage.mdx

@@ -81,6 +81,8 @@ export default defineConfig({
 
 #### Istanbul provider
 
+[Istanbul](https://istanbul.js.org/) is a widely used JavaScript code coverage tool that collects code coverage information through instrumentation.
+
 To enable istanbul coverage, you need to install the `@rstest/coverage-istanbul` package first.
 
 import { PackageManagerTabs } from '@theme';
@@ -218,3 +220,12 @@ export default defineConfig({
   },
 });
 ```
+
+When the code coverage is below the specified thresholds, the test will fail and output an error message like below:
+
+```bash
+Coverage for statements 75% does not meet global threshold 80%
+Coverage for functions 75% does not meet global threshold 80%
+Coverage for branches 75% does not meet global threshold 80%
+Coverage for lines 75% does not meet global threshold 80%
+```

website/docs/en/guide/start/features.mdx

@@ -36,7 +36,7 @@ Learn more about [DOM testing](/config/test/testEnvironment#dom-testing).
 
 ## Code coverage
 
-Rstest supports code coverage collection using Istanbul. You can enable code coverage collection by setting `coverage.enabled` to `true` in your Rstest configuration file.
+Rstest supports code coverage collection using [istanbul](https://istanbul.js.org/). You can enable code coverage collection by setting `coverage.enabled` to `true` in your Rstest configuration file.
 
 Learn more about [Code coverage](/config/test/coverage).
 

website/docs/zh/config/test/coverage.mdx

@@ -81,6 +81,8 @@ export default defineConfig({
 
 #### Istanbul provider
 
+[Istanbul](https://istanbul.js.org/) 是一个广泛使用的 JavaScript 代码覆盖率分析工具，它通过插桩的方式来收集代码覆盖率信息。
+
 要启用 istanbul 覆盖率，需要先安装 `@rstest/coverage-istanbul`。
 
 import { PackageManagerTabs } from '@theme';
@@ -218,3 +220,12 @@ export default defineConfig({
   },
 });
 ```
+
+当代码覆盖率低于指定阈值时，测试将失败并输出如下错误信息：
+
+```bash
+Coverage for statements 75% does not meet global threshold 80%
+Coverage for functions 75% does not meet global threshold 80%
+Coverage for branches 75% does not meet global threshold 80%
+Coverage for lines 75% does not meet global threshold 80%
+```

website/docs/zh/guide/start/features.mdx

@@ -36,7 +36,7 @@ Rstest 支持使用 jsdom 与 happy-dom 模拟 DOM 与浏览器 API，并对 Rea
 
 ## 代码覆盖率
 
-Rstest 支持使用 Istanbul 收集代码覆盖率。你可以通过设置 `coverage.enabled` 为 `true` 来启用代码覆盖率收集。
+Rstest 支持使用 [istanbul](https://istanbul.js.org/) 收集代码覆盖率。你可以通过设置 `coverage.enabled` 为 `true` 来启用代码覆盖率收集。
 
 了解更多关于 [代码覆盖率](/config/test/coverage)。