adjust test error messages

src/os/truncate_test.go

@@ -9,45 +9,48 @@ package os_test
 import (
 	. "os"
 	"path/filepath"
+	"runtime"
 	"testing"
 )
 
 func TestTruncate(t *testing.T) {
-	tmpDir := t.TempDir()
-	file := filepath.Join(tmpDir, "truncate_0x100")
-
-	fd, err := Create(file)
-	if err != nil {
-		t.Fatalf("create %q: %s", file, err)
-	}
-
-	// truncate up to 0x100
-	if err := fd.Truncate(0x100); err != nil {
-		t.Fatalf("truncate %q: %s", file, err)
-	}
-
-	// check if size is 0x100
-	fi, err := Stat(file)
-	if err != nil {
-		t.Fatalf("stat %q: %s", file, err)
-	}
-
-	if fi.Size() != 0x100 {
-		t.Fatalf("size of %q is %d; want 0x100", file, fi.Size())
-	}
-
-	// truncate down to 0x80
-	if err := fd.Truncate(0x80); err != nil {
-		t.Fatalf("truncate %q: %s", file, err)
-	}
-
-	// check if size is 0x80
-	fi, err = Stat(file)
-	if err != nil {
-		t.Fatalf("stat %q: %s", file, err)
-	}
-
-	if fi.Size() != 0x80 {
-		t.Fatalf("size of %q is %d; want 0x80", file, fi.Size())
+	if runtime.GOOS != "windows" {
+		tmpDir := t.TempDir()
+		file := filepath.Join(tmpDir, "truncate_test")
+
+		fd, err := Create(file)
+		if err != nil {
+			t.Fatalf("create %q: got %v, want nil", file, err)
+		}
+
+		// truncate up to 0x100
+		if err := fd.Truncate(0x100); err != nil {
+			t.Fatalf("truncate %q: got %v, want nil", file, err)
+		}
+
+		// check if size is 0x100
+		fi, err := Stat(file)
+		if err != nil {
+			t.Fatalf("stat %q: got %v, want nil", file, err)
+		}
+
+		if fi.Size() != 0x100 {
+			t.Fatalf("size of %q is %d; want 0x100", file, fi.Size())
+		}
+
+		// truncate down to 0x80
+		if err := fd.Truncate(0x80); err != nil {
+			t.Fatalf("truncate %q: got %v, want nil", file, err)
+		}
+
+		// check if size is 0x80
+		fi, err = Stat(file)
+		if err != nil {
+			t.Fatalf("stat %q: got %v, want nil", file, err)
+		}
+
+		if fi.Size() != 0x80 {
+			t.Fatalf("size of %q is %d; want 0x80", file, fi.Size())
+		}
 	}
 }