1 files changed, 37 insertions, 0 deletions
diff --git a/node_modules/collect-v8-coverage/index.js b/node_modules/collect-v8-coverage/index.js
new file mode 100644
index 0000000..8c4a779
--- /dev/null
+++ b/node_modules/collect-v8-coverage/index.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const { Session } = require('inspector');
+const { promisify } = require('util');
+
+class CoverageInstrumenter {
+  constructor() {
+    this.session = new Session();
+
+    this.postSession = promisify(this.session.post.bind(this.session));
+  }
+
+  async startInstrumenting() {
+    this.session.connect();
+
+    await this.postSession('Profiler.enable');
+
+    await this.postSession('Profiler.startPreciseCoverage', {
+      callCount: true,
+      detailed: true,
+    });
+  }
+
+  async stopInstrumenting() {
+    const {result} = await this.postSession(
+      'Profiler.takePreciseCoverage',
+    );
+
+    await this.postSession('Profiler.stopPreciseCoverage');
+
+    await this.postSession('Profiler.disable');
+
+    return result;
+  }
+}
+
+module.exports.CoverageInstrumenter = CoverageInstrumenter;