Handle browser / page crash gracefully

features/browser_crash.feature

@@ -0,0 +1,65 @@
+Feature: browser crash
+
+  Background:
+    Given additional preprocessor configuration
+      """
+      {
+        "json": {
+          "enabled": true
+        }
+      }
+      """
+
+  Rule: report generation should fail gracefully in the event of a browser crash
+
+    Scenario: Chromium process crash
+      Given a file named "cypress/e2e/a.feature" with:
+        """
+        Feature: a feature
+          Scenario: a scenario
+            Given a step
+        """
+      And a file named "cypress/support/step_definitions/steps.js" with:
+        """
+        const { Given, attach } = require("@badeball/cypress-cucumber-preprocessor");
+        Given("a step", function() {
+          new Cypress.Promise(() => {
+            Cypress.automation("remote:debugger:protocol", {
+              command: "Browser.crash",
+            });
+          });
+        });
+        """
+      When I run cypress with "--browser chromium"
+      Then it fails
+      And the output should contain
+        """
+        Due to browser crash, no reports are created for cypress/e2e/a.feature.
+        """
+      And the JSON report shouldn't contain any specs
+
+    Scenario: Renderer process crash
+      Given a file named "cypress/e2e/a.feature" with:
+        """
+        Feature: a feature
+          Scenario: a scenario
+            Given a step
+        """
+      And a file named "cypress/support/step_definitions/steps.js" with:
+        """
+        const { Given, attach } = require("@badeball/cypress-cucumber-preprocessor");
+        Given("a step", function() {
+          new Cypress.Promise(() => {
+            Cypress.automation("remote:debugger:protocol", {
+              command: "Page.crash",
+            });
+          });
+        });
+        """
+      When I run cypress with "--browser chromium"
+      Then it fails
+      And the output should contain
+        """
+        Due to browser crash, no reports are created for cypress/e2e/a.feature.
+        """
+      And the JSON report shouldn't contain any specs

lib/plugin-event-handlers.ts

@@ -496,6 +496,40 @@ export async function afterSpecHandler(
     return;
   }
 
+  /**
+   * This pretty much can't happen and the check is merely to satisfy TypeScript in the next block.
+   */
+  switch (state.state) {
+    case "uninitialized":
+    case "after-run":
+      throw createError("Unexpected state in afterSpecHandler: " + state.state);
+  }
+
+  const browserCrashExprCol = [
+    /We detected that the .+ process just crashed/,
+    /We detected that the .+ Renderer process just crashed/,
+  ];
+
+  const error = results.error;
+
+  if (error != null && browserCrashExprCol.some((expr) => expr.test(error))) {
+    console.log(
+      chalk.yellow(
+        `  Due to browser crash, no reports are created for ${spec.relative}.`
+      )
+    );
+
+    state = {
+      state: "after-spec",
+      pretty: state.pretty,
+      messages: {
+        accumulation: state.messages.accumulation,
+      },
+    };
+
+    return;
+  }
+
   switch (state.state) {
     case "test-finished": // This is the normal case.
     case "before-spec": // This can happen if a spec doesn't contain any tests.