A null was returned after calling the 'get_ProviderFactory' method on a store provider instance of type 'Oracle.DataAccess.Client.OracleConnection

I am using Entity Framework 4.4 code first(Factory Pattern) to get data from existing Oracle view. Here is my entity class:

class Data
{
    [Required]
    [StringLength(50)]
    public String EmailAddress { get; set; }

    [Required]
    [StringLength(200)]
    public String FundName { get; set; }

    [Required]
    [DecimalPrecision(AllowedPrecision=15,AllowedScale=0)]
    public Decimal FundCode { get; set; }

    [StringLength(3)]
    public String BankCode { get; set; }
}

Here is my Map class

class DataMap : EntityTypeConfiguration<Data>
{
    public DataMap() : base()
    {
        // Properties
        Property(t => t.EmailAddress).HasColumnType("varchar2");
        Property(t => t.FundName;
        Property(t => t.FundCode
        Property(t => t.BankCode).HasColumnType("varchar2");
        // Table
        ToTable("VIEW_FD_EMAIL");
    }
}

Here is my context class

class OracleContext : DbContext
{
    static OracleDataEntities()
    {
        //Database.SetInitializer<DataEntities>(new SeedingIntitializer());
        Database.SetInitializer<OracleContext>(null);
    }

    public OracleDataEntities()
        : base(new OracleConnection(ConfigurationManager.ConnectionStrings["OracleConnection"].ConnectionString), true)
    {
        Configuration.ProxyCreationEnabled = false;
    }

    public DbSet<Data> MasterFund { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {  
        modelBuilder.Conventions.Remove<ColumnTypeCasingConvention>();
        modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
        modelBuilder.Conventions.Remove<IncludeMetadataConvention>();
        base.OnModelCreating(modelBuilder);
        modelBuilder.Configurations.Add(new DataMap());
    }
}

Now while I am writing this line in test class-

var rep