From 47570943e401417f8399bbe3684fc2184b46c3a5 Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Mon, 16 Mar 2015 12:23:25 +1100
Subject: [PATCH] Implemented MtimeIs.

---
 fusetesting/stat.go | 38 ++++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/fusetesting/stat.go b/fusetesting/stat.go
index b157e08..c1d282c 100644
--- a/fusetesting/stat.go
+++ b/fusetesting/stat.go
@@ -15,17 +15,47 @@
 package fusetesting
 
 import (
+	"fmt"
+	"os"
+	"reflect"
 	"time"
 
 	"github.com/jacobsa/oglematchers"
 )
 
-// Match *os.FileInfo values that specify an mtime equal to the given time. On
+// Match os.FileInfo values that specify an mtime equal to the given time. On
 // platforms where the Sys() method returns a struct containing an mtime, check
 // also that it matches.
-func MtimeIs(expected time.Time) oglematchers.Matcher
+func MtimeIs(expected time.Time) oglematchers.Matcher {
+	return oglematchers.NewMatcher(
+		func(c interface{}) error { return mtimeIs(c, expected) },
+		fmt.Sprintf("mtime is %v", expected))
+}
 
-// Match *os.FileInfo values that specify a file birth time equal to the given
+func mtimeIs(c interface{}, expected time.Time) error {
+	fi, ok := c.(os.FileInfo)
+	if !ok {
+		return fmt.Errorf("which is of type %v", reflect.TypeOf(c))
+	}
+
+	// Check ModTime().
+	if fi.ModTime() != expected {
+		d := fi.ModTime().Sub(expected)
+		return fmt.Errorf("which has mtime %v, off by %v", fi.ModTime(), d)
+	}
+
+	// Check Sys().
+	if sysMtime, ok := extractMtime(fi.Sys()); ok {
+		if sysMtime != expected {
+			d := sysMtime.Sub(expected)
+			return fmt.Errorf("which has Sys() mtime %v, off by %v", sysMtime, d)
+		}
+	}
+
+	return nil
+}
+
+// Match os.FileInfo values that specify a file birth time equal to the given
 // time. On platforms where there is no birth time available, match all
-// *os.FileInfo values.
+// os.FileInfo values.
 func BirthtimeIs(expected time.Time) oglematchers.Matcher