Merge pull request #38 from vbatts/travis

travis: test more go versions

.travis.yml

@@ -1,8 +1,11 @@
 language: go
 go:
   - tip
-  - 1.6.2
-  - 1.5.4
+  - 1.x
+  - 1.8.x
+  - 1.7.x
+  - 1.6.x
+  - 1.5.x
 
 # let us have pretty, fast Docker-based Travis workers!
 sudo: false

archive/tar/tar_test.go

@@ -97,10 +97,9 @@ func TestRoundTrip(t *testing.T) {
 		Name: "file.txt",
 		Uid:  1 << 21, // too big for 8 octal digits
 		Size: int64(len(data)),
-		ModTime: time.Now(),
+		// https://github.com/golang/go/commit/0e3355903d2ebcf5ee9e76096f51ac9a116a9dbb#diff-d7bf2a98d7b57b6ff754ca406f1b7581R105
+		ModTime: time.Now().AddDate(0, 0, 0).Round(1 * time.Second),
 	}
-	// tar only supports second precision.
-	hdr.ModTime = hdr.ModTime.Add(-time.Duration(hdr.ModTime.Nanosecond()) * time.Nanosecond)
 	if err := tw.WriteHeader(hdr); err != nil {
 		t.Fatalf("tw.WriteHeader: %v", err)
 	}