fix(interceptor): don't drop unprocessed streams

lib/interceptor.js

@@ -442,7 +442,11 @@ module.exports = class Interceptor {
   markConsumed() {
     this.interceptionCounter++
 
-    if ((this.scope.shouldPersist() || this.counter > 0) && this.filePath) {
+    if (
+      (this.scope.shouldPersist() || this.counter > 0) &&
+      this.interceptionCounter > 1 &&
+      this.filePath
+    ) {
       this.body = fs.createReadStream(this.filePath)
       this.body.pause()
     }

tests/test_reply_with_file.js

@@ -2,7 +2,9 @@
 
 // Tests for `.replyWithFile()`.
 
+const fs = require('fs')
 const path = require('path')
+const sinon = require('sinon')
 const { expect } = require('chai')
 const proxyquire = require('proxyquire').preserveCache()
 const nock = require('..')
@@ -40,6 +42,8 @@ describe('`replyWithFile()`', () => {
   })
 
   it('reply with file with repeated', async () => {
+    sinon.spy(fs)
+
     const scope = nock('http://example.test')
       .get('/')
       .times(2)
@@ -55,6 +59,8 @@ describe('`replyWithFile()`', () => {
     expect(response2.statusCode).to.equal(200)
     expect(response2.body).to.have.lengthOf(20)
 
+    expect(fs.createReadStream.callCount).to.equal(2)
+
     scope.done()
   })