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websocket_test.go
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websocket_test.go
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package main
import (
"github.com/gorilla/websocket"
"gotest.tools/v3/assert"
"io"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
)
func TestWebsocket(t *testing.T) {
// Given empty database server
_, mux, err := NewContainer("test.txt")
assert.NilError(t, err)
server := httptest.NewServer(mux)
ws, _, err := websocket.DefaultDialer.Dial(strings.Replace(server.URL, "http", "ws", 1)+"/database", nil)
assert.NilError(t, err)
// When we add value
err = ws.WriteMessage(websocket.TextMessage, []byte("update username john"))
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select username"))
assert.NilError(t, err)
_, message, err := ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "john")
// Then value is on the list
err = ws.WriteMessage(websocket.TextMessage, []byte("list user"))
assert.NilError(t, err)
_, message, err = ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "username")
// When we increment value
err = ws.WriteMessage(websocket.TextMessage, []byte("increment money 100"))
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select money"))
assert.NilError(t, err)
_, message, err = ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "100.000000")
// When we add value
err = ws.WriteMessage(websocket.TextMessage, []byte("append orders pizza"))
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select orders"))
assert.NilError(t, err)
_, message, err = ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "pizza")
}
func TestWebsocket_Reload(t *testing.T) {
// Given empty database server
_, mux, err := NewContainer("test.txt")
assert.NilError(t, err)
server := httptest.NewServer(mux)
ws, _, err := websocket.DefaultDialer.Dial(strings.Replace(server.URL, "http", "ws", 1)+"/database", nil)
assert.NilError(t, err)
// When we add value
err = ws.WriteMessage(websocket.TextMessage, []byte("update username john"))
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select username"))
assert.NilError(t, err)
_, message, err := ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "john")
// When we reload server
err = ReloadRemoteDatabase(server.URL + "/reload")
assert.NilError(t, err)
// Then value is gone
err = ws.WriteMessage(websocket.TextMessage, []byte("select username"))
assert.NilError(t, err)
_, message, err = ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "")
}
func TestWebsocket_Client(t *testing.T) {
// Given empty database server
_, mux, err := NewContainer("test.txt")
assert.NilError(t, err)
server := httptest.NewServer(mux)
// When we ask about client
request, err := http.NewRequest("GET", server.URL, nil)
assert.NilError(t, err)
client := &http.Client{}
response, err := client.Do(request)
assert.NilError(t, err)
// Then client is there
body, err := io.ReadAll(response.Body)
assert.NilError(t, err)
assert.Check(t, strings.Contains(string(body), "<title>Database</title>"))
}
func TestWebsocket_Store(t *testing.T) {
// Given empty database server
filename := "test.txt"
_, mux, err := NewContainer(filename)
assert.NilError(t, err)
server := httptest.NewServer(mux)
ws, _, err := websocket.DefaultDialer.Dial(strings.Replace(server.URL, "http", "ws", 1)+"/database", nil)
assert.NilError(t, err)
// When we add value
err = ws.WriteMessage(websocket.TextMessage, []byte("update username john"))
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select username"))
assert.NilError(t, err)
_, message, err := ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "john")
// When we store dump
request, err := http.NewRequest("GET", server.URL+"/store", nil)
assert.NilError(t, err)
client := &http.Client{}
_, err = client.Do(request)
assert.NilError(t, err)
// And when we load it again
_, mux, err = NewContainer("test.txt")
assert.NilError(t, err)
server = httptest.NewServer(mux)
ws, _, err = websocket.DefaultDialer.Dial(strings.Replace(server.URL, "http", "ws", 1)+"/database", nil)
assert.NilError(t, err)
// Then value is there
err = ws.WriteMessage(websocket.TextMessage, []byte("select username"))
assert.NilError(t, err)
_, message, err = ws.ReadMessage()
assert.NilError(t, err)
assert.Equal(t, string(message), "john")
// Clean up
err = os.Remove(filename)
assert.NilError(t, err)
}