os: skip a new failing test on Windows

This test was recently added in CL 209961.

Apparently Windows can't seek a directory filehandle?

And move the test from test/fixedbugs (which is mostly for compiler bugs) to
an os package test.

Updates #36019

Change-Id: I626b69b0294471014901d0ccfeefe5e2c7651788
Reviewed-on: https://go-review.googlesource.com/c/go/+/210283
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

src/os/os_test.go

@@ -2406,3 +2406,45 @@ func TestUserHomeDir(t *testing.T) {
 		t.Fatalf("dir %s is not directory; type = %v", dir, fi.Mode())
 	}
 }
+
+func TestDirSeek(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		testenv.SkipFlaky(t, 36019)
+	}
+	wd, err := Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	f, err := Open(wd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	dirnames1, err := f.Readdirnames(0)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ret, err := f.Seek(0, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if ret != 0 {
+		t.Fatalf("seek result not zero: %d", ret)
+	}
+
+	dirnames2, err := f.Readdirnames(0)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	if len(dirnames1) != len(dirnames2) {
+		t.Fatalf("listings have different lengths: %d and %d\n", len(dirnames1), len(dirnames2))
+	}
+	for i, n1 := range dirnames1 {
+		n2 := dirnames2[i]
+		if n1 != n2 {
+			t.Fatalf("different name i=%d n1=%s n2=%s\n", i, n1, n2)
+		}
+	}
+}

test/fixedbugs/issue35767.go

-// run
-
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"log"
-	"os"
-)
-
-func main() {
-	wd, err := os.Getwd()
-	if err != nil {
-		log.Fatal(err)
-	}
-	f, err := os.Open(wd)
-	if err != nil {
-		log.Fatal(err)
-	}
-	dirnames1, err := f.Readdirnames(0)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	ret, err := f.Seek(0, 0)
-	if err != nil {
-		log.Fatal(err)
-	}
-	if ret != 0 {
-		log.Fatalf("seek result not zero: %d", ret)
-	}
-
-	dirnames2, err := f.Readdirnames(0)
-	if err != nil {
-		log.Fatal(err)
-		return
-	}
-
-	if len(dirnames1) != len(dirnames2) {
-		log.Fatalf("listings have different lengths: %d and %d\n", len(dirnames1), len(dirnames2))
-	}
-	for i, n1 := range dirnames1 {
-		n2 := dirnames2[i]
-		if n1 != n2 {
-			log.Fatalf("different name i=%d n1=%s n2=%s\n", i, n1, n2)
-		}
-	}
-}