}
/** check the correctness of the diff reports */
private void verifyDiffReport(Path dir, String from, String to,
DiffReportEntry... entries) throws IOException {
SnapshotDiffReport report = hdfs.getSnapshotDiffReport(dir, from, to);
// reverse the order of from and to
SnapshotDiffReport inverseReport = hdfs
.getSnapshotDiffReport(dir, to, from);
System.out.println(report.toString());
System.out.println(inverseReport.toString() + "\n");
assertEquals(entries.length, report.getDiffList().size());
assertEquals(entries.length, inverseReport.getDiffList().size());
for (DiffReportEntry entry : entries) {
if (entry.getType() == DiffType.MODIFY) {
assertTrue(report.getDiffList().contains(entry));
assertTrue(inverseReport.getDiffList().contains(entry));
} else if (entry.getType() == DiffType.DELETE) {
assertTrue(report.getDiffList().contains(entry));
assertTrue(inverseReport.getDiffList().contains(
new DiffReportEntry(DiffType.CREATE, entry.getRelativePath())));
} else if (entry.getType() == DiffType.CREATE) {
assertTrue(report.getDiffList().contains(entry));
assertTrue(inverseReport.getDiffList().contains(
new DiffReportEntry(DiffType.DELETE, entry.getRelativePath())));
}
}
}