Update stretchr/testify godep

Fix panic in tests using mock due to stretchr/testify#180

Godeps/Godeps.json

@@ -496,15 +496,15 @@
 		},
 		{
 			"ImportPath": "github.com/stretchr/testify/assert",
-			"Rev": "7e4a149930b09fe4c2b134c50ce637457ba6e966"
+			"Rev": "089c7181b8c728499929ff09b62d3fdd8df8adff"
 		},
 		{
 			"ImportPath": "github.com/stretchr/testify/mock",
-			"Rev": "7e4a149930b09fe4c2b134c50ce637457ba6e966"
+			"Rev": "089c7181b8c728499929ff09b62d3fdd8df8adff"
 		},
 		{
 			"ImportPath": "github.com/stretchr/testify/require",
-			"Rev": "7e4a149930b09fe4c2b134c50ce637457ba6e966"
+			"Rev": "089c7181b8c728499929ff09b62d3fdd8df8adff"
 		},
 		{
 			"ImportPath": "github.com/syndtr/gocapability/capability",

Godeps/_workspace/src/github.com/stretchr/testify/assert/assertions.go

@@ -84,6 +84,11 @@ func CallerInfo() []string {
 			return nil
 		}
 
+		// This is a huge edge case, but it will panic if this is the case, see #180
+		if file == "<autogenerated>" {
+			break
+		}
+
 		parts := strings.Split(file, "/")
 		dir := parts[len(parts)-2]
 		file = parts[len(parts)-1]
@@ -296,7 +301,7 @@ func NotNil(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
 	}
 
 	if !success {
-		Fail(t, "Expected not to be nil.", msgAndArgs...)
+		Fail(t, "Expected value not to be nil.", msgAndArgs...)
 	}
 
 	return success

Godeps/_workspace/src/github.com/stretchr/testify/assert/assertions_test.go

@@ -2,6 +2,7 @@ package assert
 
 import (
 	"errors"
+	"io"
 	"math"
 	"regexp"
 	"testing"
@@ -789,3 +790,24 @@ func TestRegexp(t *testing.T) {
 		True(t, NotRegexp(mockT, regexp.MustCompile(tc.rx), tc.str))
 	}
 }
+
+func testAutogeneratedFunction() {
+	defer func() {
+		if err := recover(); err == nil {
+			panic("did not panic")
+		}
+		CallerInfo()
+	}()
+	t := struct {
+		io.Closer
+	}{}
+	var c io.Closer
+	c = t
+	c.Close()
+}
+
+func TestCallerInfoWithAutogeneratedFunctions(t *testing.T) {
+	NotPanics(t, func() {
+		testAutogeneratedFunction()
+	})
+}