Add route to get a particular book

get_book_test.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"git.artlef.fr/PersonalLibraryManager/internal/testutils"
+	"github.com/stretchr/testify/assert"
+)
+
+type fetchedBook struct {
+	Title  string `json:"title" binding:"required,max=300"`
+	Author string `json:"author" binding:"max=100"`
+	Rating int    `json:"rating"`
+	Read   bool   `json:"read"`
+}
+
+func TestGetBook_Ok(t *testing.T) {
+	book := testGetBook(t, "5", http.StatusOK)
+	assert.Equal(t,
+		fetchedBook{
+			Title:  "Rigodon",
+			Author: "Louis-Ferdinand Céline",
+			Rating: 10,
+			Read:   true,
+		}, book)
+}
+
+func TestGetBook_NoUserBook(t *testing.T) {
+	book := testGetBook(t, "18", http.StatusOK)
+	assert.Equal(t,
+		fetchedBook{
+			Title:  "De sang-froid",
+			Author: "Truman Capote",
+			Read:   false,
+		}, book)
+}
+
+func TestGetBook_IdNotFound(t *testing.T) {
+	testGetBook(t, "46544", http.StatusNotFound)
+}
+
+func TestGetBook_IdNotInt(t *testing.T) {
+	testGetBook(t, "wrong", http.StatusBadRequest)
+}
+
+func testGetBook(t *testing.T, id string, status int) fetchedBook {
+	router := testutils.TestSetup()
+
+	token := testutils.ConnectDemoUser(router)
+	req, _ := http.NewRequest("GET", "/book/"+id, nil)
+	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", token))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	var book fetchedBook
+	err := json.Unmarshal(w.Body.Bytes(), &book)
+	if err != nil {
+		t.Error(err)
+	}
+	assert.Equal(t, status, w.Code)
+	return book
+}