Ensure logging of modules that failed to gather telemetry. (#130)

Ensure logging of modules that failed to gather telemetry.

Author: Robert Jackson

lib/gather-telemetry.js

@@ -7,6 +7,10 @@ module.exports = async function gatherTelemetry(url) {
 
   await page.goto(url);
 
+  await page.exposeFunction("logErrorInNodeProcess", message => {
+    console.error(message); // eslint-disable-line no-console
+  });
+
   // Get the "viewport" of the page, as reported by the page.
   const telemetry = await page.evaluate(() => {
     const SKIPPED_MODULES = ["fetch/ajax"];
@@ -31,7 +35,9 @@ module.exports = async function gatherTelemetry(url) {
         }
       } catch (error) {
         // log the error, but continue
-        console.error(`error evaluating \`${modulePath}\`: ${error.message}`); // eslint-disable-line no-console
+        window.logErrorInNodeProcess(
+          `error evaluating \`${modulePath}\`: ${error.message}`
+        );
       }
     }