Fix timestamp reading issue

Also adds a couple of basic tests for ResultSet
Should fix #63

spec/result_set_spec.cr

@@ -0,0 +1,53 @@
+require "./spec_helper"
+
+describe SQLite3::ResultSet do
+  it "reads integer data types" do
+    with_db do |db|
+      db.exec "CREATE TABLE test_table(test_int integer);"
+      db.exec "INSERT INTO test_table(test_int) values(?);", 42
+      db.query("SELECT test_int FROM test_table") do |rs|
+        rs.each do
+          rs.read.should be_a(Int64)
+        end
+      end
+    end
+  end
+
+  it "reads string data types" do
+    with_db do |db|
+      db.exec "CREATE TABLE test_table(test_text text);"
+      db.exec "INSERT INTO test_table(test_text) VALUES (?), (?)", "abc", "123"
+      db.query("SELECT test_text FROM test_table") do |rs|
+        rs.each do
+          r = rs.read
+          r.should be_a(String)
+          r.should match(/abc|123/)
+        end
+      end
+    end
+  end
+
+  it "reads time data types" do
+    with_db do |db|
+      db.exec "CREATE TABLE test_table(test_date datetime);"
+      db.exec "INSERT INTO test_table(test_date) values(current_timestamp);"
+      db.query("SELECT test_date FROM test_table") do |rs|
+        rs.each do
+          rs.read(Time).should be_a(Time)
+        end
+      end
+    end
+  end
+
+  it "reads time stored in text fields, too" do
+    with_db do |db|
+      db.exec "CREATE TABLE test_table(test_date text);"
+      db.exec "INSERT INTO test_table(test_date) values(current_timestamp);"
+      db.query("SELECT test_date FROM test_table") do |rs|
+        rs.each do
+          rs.read(Time).should be_a(Time)
+        end
+      end
+    end
+  end
+end

src/sqlite3.cr

@@ -2,7 +2,7 @@ require "db"
 require "./sqlite3/**"
 
 module SQLite3
-  DATE_FORMAT = "%F %H:%M:%S.%L"
+  DATE_FORMAT = "%F %H:%M:%S"
 
   # :nodoc:
   TIME_ZONE = Time::Location::UTC

src/sqlite3/statement.cr

@@ -70,7 +70,7 @@ class SQLite3::Statement < DB::Statement
   end
 
   private def bind_arg(index, value : Time)
-    bind_arg(index, value.in(SQLite3::TIME_ZONE).to_s(SQLite3::DATE_FORMAT))
+    bind_arg(index, value.in(SQLite3::TIME_ZONE).to_s(SQLite3::DATE_FORMAT + ".%L"))
   end
 
   private def bind_arg(index, value)