test: regression tests for istanbuljs#7

package.json

@@ -21,7 +21,9 @@
     "coveralls": "^2.11.9",
     "cross-env": "^2.0.0",
     "mocha": "^3.0.2",
+    "mock-fs": "^3.11.0",
     "nyc": "^7.0.0",
+    "pmock": "^0.2.3",
     "standard": "^7.1.2",
     "standard-version": "^2.3.1"
   },

test/babel-plugin-istanbul.js

@@ -1,6 +1,9 @@
 /* eslint-env mocha */
 
 const babel = require('babel-core')
+import mockFs from 'mock-fs'
+import mockProcess from 'pmock'
+import fs from 'fs'
 import makeVisitor from '../src'
 
 require('chai').should()
@@ -49,4 +52,78 @@ describe('babel-plugin-istanbul', function () {
       result.code.should.not.match(/statementMap/)
     })
   })
+
+  // Regression tests for /~https://github.com/istanbuljs/babel-plugin-istanbul/issues/7
+  context('when current path uses a symlink', function () {
+    beforeEach(function () {
+      mockFs({
+        '/project': {
+          'fixtures': {
+            'should-cover.js': fs.readFileSync('./fixtures/should-cover.js')
+          },
+          'package.json': fs.readFileSync('./package.json')
+        },
+        '/symlink': mockFs.symlink({path: '/project'})
+      })
+    })
+
+    const shouldInstrument = file => {
+      var result = babel.transformFileSync(file, {
+        plugins: [
+          makeVisitor({types: babel.types})
+        ]
+      })
+      result.code.should.match(/statementMap/)
+    }
+
+    context('and NYC_CWD is set', function () {
+      var env
+
+      beforeEach(function () {
+        env = mockProcess.env({
+          NYC_CWD: '/symlink'
+        })
+      })
+
+      it('should instrument file accessed via link', function () {
+        shouldInstrument('/symlink/fixtures/should-cover.js')
+      })
+
+      it('should instrument file accessed via real path', function () {
+        shouldInstrument('/project/fixtures/should-cover.js')
+      })
+
+      afterEach(function () {
+        env.reset()
+      })
+    })
+
+    context('and only process.cwd() is set', function () {
+      var env, cwd
+
+      beforeEach(function () {
+        env = mockProcess.env({
+          NYC_CWD: ''
+        })
+        cwd = mockProcess.cwd(fs.realpathSync('/symlink')) // realpath because of mock-fs Windows quirk re: process.cwd
+      })
+
+      it('should instrument file accessed via link', function () {
+        shouldInstrument('/symlink/fixtures/should-cover.js')
+      })
+
+      it('should instrument file accessed via real path', function () {
+        shouldInstrument('/project/fixtures/should-cover.js')
+      })
+
+      afterEach(function () {
+        env.reset()
+        cwd.reset()
+      })
+    })
+
+    afterEach(function () {
+      mockFs.restore()
+    })
+  })
 })

test/mocha.opts

@@ -0,0 +1 @@
+--require mock-fs