public static async Task <DbContextCheckResult> Compare(DbContext expectedctx, DbContext actualContext, params string[] ignoreFields)
{
IEnumerable <DbSet> expectedDbSets = expectedctx.DbSets();
IList <DbContextCheckEntry> collectionCountResult = await CheckCollectionCount(expectedDbSets, actualContext);
if (collectionCountResult.Count > 0)
{
return(new DbContextCheckResult(false, collectionCountResult));
}
foreach (DbSet dbSet in expectedDbSets)
{
var expectedList = await dbSet.ToListAsync();
var ignoredMembers = GetIgnoredMembers(dbSet.ElementType.Name, ignoreFields);
foreach (Object expectedObject in expectedList)
{
Object actualObject = null;
var idProp = expectedctx.KeyMemberFor(dbSet.ElementType);
var prop = expectedObject.GetType().GetProperty(idProp, BindingFlags.Public | BindingFlags.Instance);
if (prop != null)
{
var idValue = prop.GetValue(expectedObject);
var actualDbSet = actualContext.Set(dbSet.ElementType);
actualObject = actualDbSet.Find(idValue);
if (actualObject == null)
{
string columnName = expectedctx.MappedColumnName(dbSet.ElementType.Name, prop.Name);
DbContextCheckEntry entry = DbContextCheckEntry
.ForObject(idValue.ToString(), dbSet.ElementType.Name, null, columnName)
.WithDescription("we couldn't find an actual object with expected id : "
+ idValue + " - this can be caused because the id is auto generated. You could adapt the ids of the expected object");
return(new DbContextCheckResult(false, entry));
}
else
{
//Issue #1 : we should only check for entity that have unchanged state.
if (actualContext.Entry(actualObject).State ==
expectedctx.Entry(expectedObject).State)
{
ComparisonResult cr = DbContextComparer.CompareObjects(expectedObject, actualObject, ignoredMembers);
if (!cr.AreEqual)
{
string columnName = expectedctx.MappedColumnName(dbSet.ElementType.Name, prop.Name);
return(new DbContextCheckResult(false,
cr.Differences.ToDbContextCheckEntry(idValue.ToString(), dbSet.ElementType.Name, actualObject, columnName)));
}
}
else
{
string columnName = actualContext.MappedColumnName(dbSet.ElementType.Name, prop.Name);
DbContextCheckEntry entry =
DbContextCheckEntry
.ForObject(idValue.ToString(), dbSet.ElementType.Name, actualObject, columnName)
.WithProperty("EntityState").Was(actualContext.Entry(actualObject).State.ToString())
.InsteadOf(expectedctx.Entry(expectedObject).State.ToString());
return(new DbContextCheckResult(false, entry));
}
}
}
}
}
return(new DbContextCheckResult());
}
public static async Task <DbContextCheckResult> CompareTo(this DbContext dbcontext, DbContext expectedContext, params string[] ignoredProperties)
{
return(await DbContextComparer.Compare(expectedContext, dbcontext, ignoredProperties));
}