# require 'spec_helper'
class DummyClass
end
describe "#form_query_for_datatype" do
  before(:each) do
    # Creating a dummy object to test the modules.
    # Extending with dummy object by adding module methods to it using extend
    @dummy_class = DummyClass.new
    @dummy_class.extend(CsvImportAnalyzer::PgQueryHelper)
  end
  context "when expected arguments are not set" do
    let(:args) {Hash[:header => :test]}
    let(:args1) {Hash[:datatype, :test]}
    it "returns missing arguments error" do
      expect(@dummy_class.form_query_for_datatype(args)).to be_instance_of(MissingRequiredArguments)
    end
    it "returns invalid if set to nil" do
      expect(@dummy_class.form_query_for_datatype(args1)).to be_instance_of(MissingRequiredArguments)
    end
  end
  context "when expected arguments are set" do
    let(:args) {Hash[:header => :test, :datatype => :string]}
    let(:args1) {Hash[:header => :test, :datatype => :integer]}
    it "returns expected sql query for string" do
      expect(@dummy_class.form_query_for_datatype(args)).to eq("test varchar(255)")
    end
    it "returns expected sql query for numeric" do
      expect(@dummy_class.form_query_for_datatype(args1)).to eq("test integer")
    end
  end
end
describe "#import_csv" do
  before(:each) do
    @dummy_class = DummyClass.new
    @dummy_class.extend(CsvImportAnalyzer::PgQueryHelper)
  end
  context "when expected arguments are not set" do
    let(:args) {Hash[:tablename => "test", :delimiter => ","]}
    let(:args1) {Hash[:filename => "test"]}
    it "returns SqlQueryErrror" do
      expect(@dummy_class.import_csv(args)).to be_instance_of(MissingRequiredArguments)
    end
    it "returns SqlQueryErrror" do
      expect(@dummy_class.import_csv(args1)).to be_instance_of(MissingRequiredArguments)
    end
  end

  context "when expected arguments are set" do
    let(:args) {Hash[:tablename => "test", :delimiter => ",", :filename => "filename"]}
    it "returns expected import query" do
      expect(@dummy_class.import_csv(args)).to eq("COPY test FROM 'filename' HEADER DELIMITER ',' CSV NULL AS 'NULL';")
    end
  end

end