完成 add

這次也抓到測試碼的錯誤：go 似乎是依字母順序來執行測試的，所以新增資料的
測試碼會造成資料污染。這裡先把正常 add 的資料獨立出來．確認 add 的程式正
常之後，再另外處理資料獨立的問題

cmd/xchg/add.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"git.ronmi.tw/ronmi/sdm"
+	"github.com/Patrolavia/jsonapi"
+)
+
+type add struct {
+	M *sdm.Manager
+}
+
+func (h *add) Handle(enc *json.Encoder, dec *json.Decoder, httpData *jsonapi.HTTP) {
+	var param Order
+	if err := dec.Decode(&param); err != nil {
+		httpData.WriteHeader(http.StatusBadRequest)
+		enc.Encode("Parameter is not Order object")
+		return
+	}
+
+	// validating data
+	param.Code = strings.ToUpper(strings.TrimSpace(param.Code))
+	if len(param.Code) != 3 || param.Local == 0 || param.Foreign == 0 || param.Time <= 0 {
+		httpData.WriteHeader(http.StatusBadRequest)
+		enc.Encode("Parameter is not Order object")
+		return
+	}
+
+	if _, err := h.M.Insert("orders", param); err != nil {
+		httpData.WriteHeader(http.StatusInternalServerError)
+		enc.Encode(fmt.Sprintf("Error saving order: %s", err))
+		return
+	}
+
+	enc.Encode(nil)
+}

cmd/xchg/add_test.go

@@ -1,17 +1,27 @@
 package main
 
 import (
+	"database/sql"
 	"net/http"
 	"strings"
 	"testing"
 
+	"git.ronmi.tw/ronmi/sdm"
+
 	"github.com/Patrolavia/jsonapi"
 )
 
 func TestAddOK(t *testing.T) {
-	h := &add{mgr}
+	db, err := sql.Open("sqlite3", ":memory:")
+	if err != nil {
+		t.Fatalf("Cannot connect to another db: %s", err)
+	}
+	initTable(db)
+	defer db.Close()
+
+	h := &add{sdm.New(db)}
 
-	resp, err := jsonapi.HandlerTest(h.Handle).Post("/api/add", "", `{"when":1468248043,"foreign":100,"local":-100,"code":"USD"}`)
+	resp, err := jsonapi.HandlerTest(h.Handle).Post("/api/add", "", `{"when":1468248043,"foreign":100,"local":-100,"code":"AUD"}`)
 
 	if err != nil {
 		t.Fatalf("unexpected error occured when testing add: %s", err)