Fix #3

tests/test.js

 const fs = require('fs')
 const test = require('ava')
-const {execFilePromise, matchOutput, reorderings} = require('./util')
+const {execFilePromise, matchOutput, reorderings, updateExpectedPaths} = require('./util')
 
 process.chdir(__dirname)
 
-const RUST_MUTABLE_EXPECTED = [
+const RUST_MUTABLE_EXPECTED = updateExpectedPaths([
   [
     'files/rust-book/ch10-03-lifetime-syntax.md:reference to an `i32` that has a lifetime parameter named `\'a`, and a mutable',
     'files/rust-book/ch10-03-lifetime-syntax.md:&\'a mut i32 // a mutable reference with an explicit lifetime'
@@ -210,7 +210,7 @@ const RUST_MUTABLE_EXPECTED = [
     'files/rust-book/ch16-03-shared-state.md:this case, as a mutable reference to the data inside. The type system ensures',
     'files/rust-book/ch16-03-shared-state.md:You might have noticed that `counter` is immutable but we could get a mutable'
   ]
-]
+])
 const MULTIPLE_RUST_FILES = [
   'files/rust-book/ch04-01-what-is-ownership.md',
   'files/rust-book/ch08-03-hash-maps.md',
@@ -296,7 +296,7 @@ const TESTS = [
     // Test -r with omitted directory.
     // This also tests a more deeply-nested recursive structure.
     args: ['-r', 'crow' + 'n'],
-    expected: [
+    expected: updateExpectedPaths([
       [
         'files/richard-iii/1/1/3/2.txt:To fight on Edward’s party for the crow' + 'n ;',
         'files/richard-iii/1/1/3/2.txt:When thou didst crow' + 'n his warlike brows with paper ,'
@@ -330,12 +330,12 @@ const TESTS = [
       ],
       ['files/richard-iii/3/1/2/2.txt:And by that knot looks proudly on the crow' + 'n ,'],
       ['files/richard-iii/3/2.txt:The first was I that helped thee to the crow' + 'n ;']
-    ]
+    ])
   },
   {
     // Test a more complicated regex
     args: ['-r', '[a-z]{3}\\d', 'files/rust-book'],
-    expected: [
+    expected: updateExpectedPaths([
       [
         'files/rust-book/ch10-03-lifetime-syntax.md:type stored in the variable `string1`) as well as string literals (which is',
         'files/rust-book/ch10-03-lifetime-syntax.md:what variable `string2` contains).',
@@ -418,12 +418,12 @@ const TESTS = [
         'files/rust-book/ch15-01-box.md:<img alt="An infinite Cons list" src="img/trpl15-01.svg" class="center" style="width: 50%;" />',
         'files/rust-book/ch15-01-box.md:<img alt="A finite Cons list" src="img/trpl15-02.svg" class="center" />'
       ]
-    ]
+    ])
   },
   {
     // Test -i with regex
     args: ['-i', '-r', '[a-z]{3}\\d', 'files/rust-book'],
-    expected: [
+    expected: updateExpectedPaths([
       [
         'files/rust-book/ch10-03-lifetime-syntax.md:type stored in the variable `string1`) as well as string literals (which is',
         'files/rust-book/ch10-03-lifetime-syntax.md:what variable `string2` contains).',
@@ -517,7 +517,7 @@ const TESTS = [
         'files/rust-book/ch15-01-box.md:<img alt="An infinite Cons list" src="img/trpl15-01.svg" class="center" style="width: 50%;" />',
         'files/rust-book/ch15-01-box.md:<img alt="A finite Cons list" src="img/trpl15-02.svg" class="center" />'
       ]
-    ]
+    ])
   },
   {
     // Test -z flag,

tests/util.js

 const {execFile} = require('child_process')
+const path = require('path')
 const {promisify} = require('util')
 
 exports.execFilePromise = promisify(execFile)
@@ -16,6 +17,14 @@ function* reorderings(fixed, reorderable) {
 }
 exports.reorderings = reorderings
 
+/** Updates the path separators in an expected output to match the OS's separator */
+exports.updateExpectedPaths = expected =>
+  expected.map(lineGroup => lineGroup.map(line => {
+    const pathEnd = line.indexOf(':')
+    if (pathEnd < 0) throw new Error('Line does not have a path')
+    return path.join(...line.slice(0, pathEnd).split('/')) + line.slice(pathEnd)
+  }))
+
 function toLines(text) {
   const lines = text.split('\n')
   if (lines.length && !lines[lines.length - 1]) lines.pop()