refactor: init cypress-cucumber-preprocessor install.

node_modules/@cypress/browserify-preprocessor/lib/simple_tsify.js

@@ -0,0 +1,58 @@
+const through = require('through2')
+const path = require('path')
+
+const isJson = (code) => {
+  try {
+    JSON.parse(code)
+  } catch (e) {
+    return false
+  }
+
+  return true
+}
+
+// tsify doesn't have transpile-only option like ts-node or ts-loader.
+// It means it should check types whenever spec file is changed
+// and it slows down the test speed a lot.
+// We skip this slow type-checking process by using transpileModule() api.
+module.exports = function (fileName, opts) {
+  const ts = opts.typescript
+  const chunks = []
+  const ext = path.extname(fileName)
+
+  return through(
+    (buf, enc, next) => {
+      chunks.push(buf.toString())
+      next()
+    },
+    function (next) {
+      const text = chunks.join('')
+
+      if (isJson(text)) {
+        this.push(text)
+      } else {
+        this.push(
+          ts.transpileModule(text, {
+            // explicitly name the file here
+            // for sourcemaps
+            fileName,
+            compilerOptions: {
+              esModuleInterop: true,
+              // inline the source maps into the file
+              // https://github.com/cypress-io/cypress-browserify-preprocessor/issues/48
+              inlineSourceMap: true,
+              inlineSources: true,
+              jsx:
+                ext === '.tsx' || ext === '.jsx' || ext === '.js'
+                  ? 'react'
+                  : undefined,
+              downlevelIteration: true,
+            },
+          }).outputText,
+        )
+      }
+
+      next()
+    },
+  )
+}