move spec and src files to a shardy way

spec/statement_spec.cr

@@ -0,0 +1,112 @@
+require "./spec_helper"
+
+describe DB::Statement do
+  it "should prepare statements" do
+    with_dummy do |db|
+      db.prepare("the query").should be_a(DB::Statement)
+    end
+  end
+
+  it "should initialize positional params in query" do
+    with_dummy do |db|
+      stmt = db.prepare("the query")
+      stmt.query "a", 1, nil
+      stmt.params[0].should eq("a")
+      stmt.params[1].should eq(1)
+      stmt.params[2].should eq(nil)
+    end
+  end
+
+  it "should initialize positional params in query with array" do
+    with_dummy do |db|
+      stmt = db.prepare("the query")
+      stmt.query ["a", 1, nil]
+      stmt.params[0].should eq("a")
+      stmt.params[1].should eq(1)
+      stmt.params[2].should eq(nil)
+    end
+  end
+
+  it "should initialize positional params in exec" do
+    with_dummy do |db|
+      stmt = db.prepare("the query")
+      stmt.exec "a", 1, nil
+      stmt.params[0].should eq("a")
+      stmt.params[1].should eq(1)
+      stmt.params[2].should eq(nil)
+    end
+  end
+
+  it "should initialize positional params in exec with array" do
+    with_dummy do |db|
+      stmt = db.prepare("the query")
+      stmt.exec ["a", 1, nil]
+      stmt.params[0].should eq("a")
+      stmt.params[1].should eq(1)
+      stmt.params[2].should eq(nil)
+    end
+  end
+
+  it "should initialize positional params in scalar" do
+    with_dummy do |db|
+      stmt = db.prepare("the query")
+      stmt.scalar "a", 1, nil
+      stmt.params[0].should eq("a")
+      stmt.params[1].should eq(1)
+      stmt.params[2].should eq(nil)
+    end
+  end
+
+  it "query with block should not close statement" do
+    with_dummy do |db|
+      stmt = db.prepare "3,4 1,2"
+      stmt.query
+      stmt.closed?.should be_false
+    end
+  end
+
+  it "query with block should not close statement" do
+    with_dummy do |db|
+      stmt = db.prepare "3,4 1,2"
+      stmt.query do |rs|
+      end
+      stmt.closed?.should be_false
+    end
+  end
+
+  it "query should not close statement" do
+    with_dummy do |db|
+      stmt = db.prepare "3,4 1,2"
+      stmt.query do |rs|
+      end
+      stmt.closed?.should be_false
+    end
+  end
+
+  it "scalar should not close statement" do
+    with_dummy do |db|
+      stmt = db.prepare "3,4 1,2"
+      stmt.scalar
+      stmt.closed?.should be_false
+    end
+  end
+
+  it "exec should not close statement" do
+    with_dummy do |db|
+      stmt = db.prepare "3,4 1,2"
+      stmt.exec
+      stmt.closed?.should be_false
+    end
+  end
+
+  it "connection should cache statements by query" do
+    with_dummy do |db|
+      rs = db.query "1, ?", 2
+      stmt = rs.statement
+      rs.close
+
+      rs = db.query "1, ?", 4
+      rs.statement.should be(stmt)
+    end
+  end
+end