adjust test

Author: ZekeLu

src/debug/elf/elf_test.go

@@ -47,25 +47,3 @@ func TestNames(t *testing.T) {
 		}
 	}
 }
-
-func TestNobitsSection(t *testing.T) {
-	const testdata = "testdata/gcc-amd64-linux-exec"
-	f, err := Open(testdata)
-	if err != nil {
-		t.Fatalf("could not read %s: %v", testdata, err)
-	}
-	defer f.Close()
-	bss := f.Section(".bss")
-	bssData, err := bss.Data()
-	if err != nil {
-		t.Fatalf("error reading .bss section: %v", err)
-	}
-	if g, w := uint64(len(bssData)), bss.Size; g != w {
-		t.Errorf(".bss section length mismatch: got %d, want %d", g, w)
-	}
-	for i := range bssData {
-		if bssData[i] != 0 {
-			t.Fatalf("unexpected non-zero byte at offset %d: %#x", i, bssData[i])
-		}
-	}
-}

src/debug/elf/file_test.go

@@ -944,6 +944,30 @@ func TestNoSectionOverlaps(t *testing.T) {
 	}
 }
 
+func TestNobitsSection(t *testing.T) {
+	const testdata = "testdata/gcc-amd64-linux-exec"
+	f, err := Open(testdata)
+	if err != nil {
+		t.Fatalf("could not read %s: %v", testdata, err)
+	}
+	defer f.Close()
+
+	wantError := "unexpected read from SHT_NOBITS section"
+	bss := f.Section(".bss")
+
+	_, err = bss.Data()
+	if err == nil || err.Error() != wantError {
+		t.Fatalf("bss.Data() got error %q, want error %q", err, wantError)
+	}
+
+	r := bss.Open()
+	p := make([]byte, 1)
+	_, err = r.Read(p)
+	if err == nil || err.Error() != wantError {
+		t.Fatalf("r.Read(p) got error %q, want error %q", err, wantError)
+	}
+}
+
 func TestIssue10996(t *testing.T) {
 	data := []byte("\u007fELF\x02\x01\x010000000000000" +
 		"\x010000000000000000000" +