Ignore v8 coverage for not testable codes correctly

src/engine.ts

@@ -98,6 +98,7 @@ export class ResolvedEngine {
   }
 
   // NOTE: It cannot test because of overriding `require` in Jest context.
+  /* c8 ignore next */
   private findClassPath(klass) {
     for (const moduleId in require.cache) {
       const expt = require.cache[moduleId]?.exports

src/preview.ts

@@ -85,7 +85,7 @@ export class Preview extends (EventEmitter as new () => TypedEmitter<Preview.Eve
           return await page.close()
         } catch (e: any) {
           // Ignore raising error if a target page has already close
-          /* istanbul ignore next */
+          /* c8 ignore next */
           if (!e.message.includes('Target closed.')) throw e
         }
       },
@@ -183,7 +183,7 @@ export class Preview extends (EventEmitter as new () => TypedEmitter<Preview.Eve
 
     let windowObject: Preview.Window | undefined
 
-    /* istanbul ignore next */
+    /* c8 ignore next */
     if (process.platform === 'darwin') {
       // An initial app window is not using in macOS for correct handling activation from Dock
       windowObject = (await this.createWindow()) || undefined

src/templates/bespoke/utils/transition.ts

@@ -37,7 +37,7 @@ export const _testElementAnimation = (
   elm: HTMLElement,
   callback: (ret: MarpTransitionResolvableKeyframeSettings | undefined) => void
 ) => {
-  /* istanbul ignore next */
+  /* c8 ignore next */
   requestAnimationFrame(() => {
     elm.style.animationPlayState = 'running'
     requestAnimationFrame(() => callback(undefined))

src/utils/chrome-finder.ts

@@ -27,11 +27,12 @@ export const findChromeInstallation = async () => {
         return linux()
       case 'win32':
         return win32()
-      /* istanbul ignore next: CI cannot test against WSL environment */
+      // CI cannot test against WSL environment
+      /* c8 ignore next */
       case 'wsl':
         return wsl()
     }
-    /* istanbul ignore next */
+    /* c8 ignore next */
     return []
   })()