feat: initial project setup

internal/handlers/book_handler.go

@@ -0,0 +1,36 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"git.workflows.cl/mcabezas/testing-go-example/internal/models"
+)
+
+type BookHandler struct {
+	books []models.Book
+}
+
+func NewBookHandler() *BookHandler {
+	return &BookHandler{
+		books: []models.Book{
+			{ID: "1", Title: "El Quijote", Author: "Cervantes"},
+			{ID: "2", Title: "Cien años de soledad", Author: "García Márquez"},
+		},
+	}
+}
+
+func (h *BookHandler) GetBook(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+
+	for _, book := range h.books {
+		if book.ID == id {
+			w.Header().Set("Content-Type", "application/json")
+			json.NewEncoder(w).Encode(book)
+			return
+		}
+	}
+
+	http.Error(w, "Book not found", http.StatusNotFound)
+}

internal/handlers/book_handler_test.go

@@ -0,0 +1,64 @@
+package handlers
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+	"git.workflows.cl/mcabezas/testing-go-example/internal/models"
+)
+
+func TestGetBook(t *testing.T) {
+	handler := NewBookHandler()
+
+	req := httptest.NewRequest(http.MethodGet, "/books/1", nil)
+
+	// Configurar contexto de chi con el parámetro id
+	rctx := chi.NewRouteContext()
+	rctx.URLParams.Add("id", "1")
+	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))
+
+	w := httptest.NewRecorder()
+
+	handler.GetBook(w, req)
+
+	// Verificar código de estado
+	if w.Code != http.StatusOK {
+		t.Errorf("esperaba status 200, obtuvo %d", w.Code)
+	}
+
+	// Verificar respuesta
+	var book models.Book
+	if err := json.NewDecoder(w.Body).Decode(&book); err != nil {
+		t.Fatalf("error al decodificar: %v", err)
+	}
+
+	if book.ID != "1" {
+		t.Errorf("esperaba ID '1', obtuvo '%s'", book.ID)
+	}
+
+	if book.Title != "El Quijote" {
+		t.Errorf("esperaba título 'El Quijote', obtuvo '%s'", book.Title)
+	}
+}
+
+func TestGetBook_NotFound(t *testing.T) {
+	handler := NewBookHandler()
+
+	req := httptest.NewRequest(http.MethodGet, "/books/999", nil)
+
+	rctx := chi.NewRouteContext()
+	rctx.URLParams.Add("id", "999")
+	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))
+
+	w := httptest.NewRecorder()
+
+	handler.GetBook(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("esperaba status 404, obtuvo %d", w.Code)
+	}
+}

internal/models/book.go

@@ -0,0 +1,7 @@
+package models
+
+type Book struct {
+	ID     string `json:"id"`
+	Title  string `json:"title"`
+	Author string `json:"author"`
+}