refactoring instrument

bahmutov · Nov 13, 2024 · a2be40b · a2be40b
1 parent bbbbf8c
commit a2be40b
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Showing 2 changed files with 31 additions and 23 deletions.
diff --git a/cypress.config.ts b/cypress.config.ts
@@ -8,6 +8,8 @@ export default defineConfig({
       coverage: {
         // set to true to hide the messages in the Command Log
         quiet: false,
+        // intercept and instrument scripts matching these URLs
+        instrument: '**/calculator/**/*.js',
       },
     },
     // We've imported your old cypress plugins here.

diff --git a/cypress/e2e/calculator.cy.js b/cypress/e2e/calculator.cy.js
@@ -13,35 +13,41 @@ const baseUrl = Cypress.config('baseUrl')
 // @ts-ignore
 const proxyServer = Cypress.config('proxyServer') + '/'
 
+const instrumentScripts = Cypress.env('coverage')?.instrument
+
 it(
   'collects code coverage on the fly',
   { viewportWidth: 1200, viewportHeight: 1000, baseUrl: null },
   () => {
-    cy.intercept(
-      {
-        method: 'GET',
-        resourceType: 'script',
-      },
-      (req) => {
-        // TODO: remove caching headers for now
-        // @ts-ignore
-        req.continue((res) => {
-          const relativeUrl = req.url
+    if (instrumentScripts) {
+      cy.intercept(
+        {
+          method: 'GET',
+          resourceType: 'script',
+          url: instrumentScripts,
+        },
+        (req) => {
+          // TODO: remove caching headers for now
+          // @ts-ignore
+          req.continue((res) => {
+            const relativeUrl = req.url
+              // @ts-ignore
+              .replace(baseUrl, '')
+              .replace(proxyServer, '')
+            // console.log('instrumenting', relativeUrl)
+
             // @ts-ignore
-            .replace(baseUrl, '')
-            .replace(proxyServer, '')
-          console.log('instrumenting', relativeUrl)
+            const instrumented = instrumenter.instrumentSync(
+              res.body,
+              relativeUrl,
+            )
+            res.body = instrumented
+            return res
+          })
+        },
+      )
+    }
 
-          // @ts-ignore
-          const instrumented = instrumenter.instrumentSync(
-            res.body,
-            relativeUrl,
-          )
-          res.body = instrumented
-          return res
-        })
-      },
-    )
     cy.visit('cypress/calculator/index.html')
     // after instrumenting the coverage should be collected in the window object
     // under window.__coverage__ key