public void Diff1ToDiff2ShouldBeState1ToState2Test(IDbStateReference dbState0, IDbStateReference dbState1, IDbStateReference dbState2)
{
var dbComparer = new DbComparer();
var diff1 = dbComparer.GetDbDiff(dbState0, dbState1);
var diff2 = dbComparer.GetDbDiff(dbState0, dbState2);
var diff3 = dbComparer.GetDbDiff(dbState1, dbState2);
var diffOfDiff = dbComparer.GetDbDiff(diff1, diff2);
diffOfDiff.Should().Be(diff3);
}
public DbDiff GetDbDiff(IDbStateReference ref1, IDbStateReference ref2)
{
// TODO: Heavily improve performance/memory usage!!!
var idList1 = ref1.GetBusinessIds().ToList();
var idList2 = ref2.GetBusinessIds().ToList();
var addIdList = idList2.Except(idList1);
var delIdList = idList1.Except(idList2);
var updIdCandidateList = idList1.Intersect(idList2);
var diffEntryList = new List <DbDiffEntry>();
var addList = ref2.GetDbEntries()
.Where(e => addIdList.Contains(e.BusinessId))
.Select(e => new DbDiffEntry
{
DbEntryAfter = e
})
.ToList();
diffEntryList.AddRange(addList);
var delList = ref1.GetDbEntries()
.Where(e => delIdList.Contains(e.BusinessId))
.Select(e => new DbDiffEntry
{
DbEntryBefore = e
})
.ToList();
diffEntryList.AddRange(delList);
foreach (var updIdCandidate in updIdCandidateList)
{
var entry1 = ref1.GetDbEntries().Single(e => e.BusinessId == updIdCandidate);
var entry2 = ref2.GetDbEntries().Single(e => e.BusinessId == updIdCandidate);
if (!entry1.Equals(entry2))
{
var dbDiffEntry = new DbDiffEntry
{
DbEntryBefore = entry1,
DbEntryAfter = entry2
};
diffEntryList.Add(dbDiffEntry);
}
}
diffEntryList.Sort();
return(new DbDiff
{
DbDiffEntryList = diffEntryList
});
}
