Add tests

spec/exceptions_spec.rb

@@ -0,0 +1,22 @@
+require_relative "../lib/hathifiles_database/db/connection"
+
+RSpec.describe HathifilesDatabase::Exception do
+  describe HathifilesDatabase::Exception::WrongNumberOfColumns do
+    let(:test_params) { {htid: "test.001", count: 22, expected: 33} }
+
+    describe "#initialize" do
+      it "creates a WrongNumberOfColumns object" do
+        expect(described_class.new(**test_params)).to be_a HathifilesDatabase::Exception::WrongNumberOfColumns
+      end
+    end
+
+    describe "#to_s" do
+      it "includes the htid, expected, and count values" do
+        @exc = described_class.new(**test_params)
+        # HathifilesDatabase::Exception::WrongNumberOfColumns htid = test.001 has 22 items (expected 33)
+        expect(@exc.to_s).to match "test.001"
+      end
+    end
+  end
+end
+

spec/hathifiles_database_spec.rb

@@ -3,6 +3,7 @@
     expect(HathifilesDatabase::VERSION).not_to be nil
   end
 
-
-
+  it "can create a connection" do
+    expect(HathifilesDatabase.new(ENV["HATHIFILES_MYSQL_CONNECTION"])).to be_a HathifilesDatabase::DB::Connection
+  end
 end