Added pgxmock for testing with required interface refactor

README.md

@@ -2,10 +2,22 @@
 
 ![build-status](https://drone.runcible.io/api/badges/learning/pulley/status.svg)
 
-
 A Golang HTTP API 
 
 
+## Local Development
+
+This project uses air and a docker container for postgres to serve as the local development environment.
+
+
+
+```bash
+source .local.profile
+make start-local
+air
+```
+
+
 ## Routes
 
 Uses [CleanURLs](https://en.wikipedia.org/wiki/Clean_URL)

cmd/api/handlers.go

@@ -114,7 +114,6 @@ func (app *application) getMovieHandler(w http.ResponseWriter, r *http.Request)
 
 	err = app.writeJSON(w, http.StatusOK, envelope{"movie": movie}, nil)
 	if err != nil {
-		//app.logger.Error(err.Error())
 		//http.Error(w, "The server encountered a problem and could not process your request", http.StatusInternalServerError)
 		app.serverErrorResponse(w, r, err)
 	}
@@ -270,7 +269,7 @@ func (app *application) listMoviesHandler(w http.ResponseWriter, r *http.Request
 		return
 	}
 
-	movies, err := app.models.Movies.List(r.Context())
+	movies, err := app.models.Movies.GetAll(r.Context(), input.Title, input.Genres, input.Filters)
 	if err != nil {
 		app.serverErrorResponse(w, r, err)
 		return

cmd/api/handlers_test.go

@@ -8,28 +8,43 @@ import (
 	"log/slog"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"strings"
 	"testing"
+	"time"
 
 	"git.runcible.io/learning/pulley/internal/assert"
 	"git.runcible.io/learning/pulley/internal/config"
+	"git.runcible.io/learning/pulley/internal/data"
+	"git.runcible.io/learning/pulley/internal/database"
+	"github.com/pashagolub/pgxmock/v4"
 )
 
-func newTestApplication() application {
+func newTestApplication(pool database.PgxIface) application {
 	cfg := config.ServiceConfig{Env: "test"}
-	return application{config: cfg, logger: slog.New(slog.NewTextHandler(io.Discard, nil))}
+	mockModels := data.NewModels(pool)
+	// Discards log output from tests
+	// logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelDebug, AddSource: true}))
+
+	return application{config: cfg, logger: logger, models: mockModels}
 
 }
 
 func TestHealthRoute(t *testing.T) {
 	respRec := httptest.NewRecorder()
+	mockPool, err := pgxmock.NewPool()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mockPool.Close()
 
 	r, err := http.NewRequest(http.MethodGet, "/v1/healthcheck", nil)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	app := newTestApplication()
+	app := newTestApplication(mockPool)
 	app.routes().ServeHTTP(respRec, r)
 
 	resp := respRec.Result()
@@ -49,15 +64,40 @@ func TestHealthRoute(t *testing.T) {
 
 func TestCreateMovieHandler(t *testing.T) {
 	respRec := httptest.NewRecorder()
+	mockPool, err := pgxmock.NewPool()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mockPool.Close()
 
-	requestBody := `{"title": "Moana", "year": 2019, "runtime": "120 mins", "genres": ["family", "Samoan"]}`
+	movie := struct {
+		Title   string   `json:"title"`
+		Year    int32    `json:"year"`
+		Runtime string   `json:"runtime"`
+		Genres  []string `json:"genres"`
+	}{
+		Title:   "Moana",
+		Year:    2019,
+		Runtime: "120 mins",
+		Genres:  []string{"family", "Samoan"},
+	}
+
+	mockPool.ExpectQuery("INSERT INTO movies").
+		// must use Runtime explicitly for args
+		WithArgs(movie.Title, movie.Year, data.Runtime(120), movie.Genres).
+		WillReturnRows(
+			pgxmock.NewRows([]string{"id", "created_at", "version"}).
+				AddRow(1, time.Now(), 1), // These values will be scanned into the struct
+		)
+
+	rquestBody, _ := json.Marshal(movie)
 
-	r, err := http.NewRequest(http.MethodPost, "/v1/movies", strings.NewReader(requestBody))
+	r, err := http.NewRequest(http.MethodPost, "/v1/movies", bytes.NewBuffer(rquestBody))
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	app := newTestApplication()
+	app := newTestApplication(mockPool)
 	app.routes().ServeHTTP(respRec, r)
 
 	resp := respRec.Result()
@@ -72,10 +112,20 @@ func TestCreateMovieHandler(t *testing.T) {
 	body = bytes.TrimSpace(body)
 
 	assert.StringContains(t, string(body), "Moana")
+	err = mockPool.ExpectationsWereMet()
+	if err != nil {
+		t.Errorf("there were unfulfilled expectations: %s", err)
+	}
 }
 
 // Consider simply testing app.jsonReader
-func TestCreateMovieError(t *testing.T) {
+func TestCreateMovieValidatorError(t *testing.T) {
+
+	mockPool, err := pgxmock.NewPool()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mockPool.Close()
 
 	tests := []struct {
 		name     string
@@ -148,7 +198,7 @@ func TestCreateMovieError(t *testing.T) {
 				t.Fatal(err)
 			}
 
-			app := newTestApplication()
+			app := newTestApplication(mockPool)
 
 			app.routes().ServeHTTP(respRec, r)
 
@@ -166,8 +216,15 @@ func TestCreateMovieError(t *testing.T) {
 
 }
 
-func TestGetAllMoviesHandler(t *testing.T) {
+func TestGetMovieHandler(t *testing.T) {
+
+	mockPool, err := pgxmock.NewPool()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mockPool.Close()
 
+	// TODO since this isn't a table test anymore should be able to refactor it
 	testTable := []struct {
 		name     string
 		id       string
@@ -179,10 +236,53 @@ func TestGetAllMoviesHandler(t *testing.T) {
 			id:       "1337",
 			wantCode: 200,
 		},
+	}
+
+	mockPool.ExpectQuery("SELECT id, created_at, title, year, runtime, genres, version FROM movies").
+		WithArgs(int64(1337)).WillReturnRows(
+		pgxmock.NewRows([]string{"id", "created_at", "title", "year", "runtime", "genres", "version"}).
+			AddRow(int64(1337), time.Now(), "a laura is born", 1990, 36, []string{"family", "wife"}, 1), // These values will be scanned into the struct
+	)
+
+	for _, test := range testTable {
+		t.Run(test.name, func(t *testing.T) {
+			respRec := httptest.NewRecorder()
+
+			r, err := http.NewRequest(http.MethodGet, fmt.Sprintf("/v1/movies/%s", test.id), nil)
+			t.Logf("Path: %s, Method: %s", r.URL.Path, r.Method)
+			assert.NilError(t, err)
+
+			app := newTestApplication(mockPool)
+			// want to test with httprouter since we use it to parse context
+			app.routes().ServeHTTP(respRec, r)
+
+			resp := respRec.Result()
+			t.Logf("Code: %d", resp.StatusCode)
+			assert.Equal(t, resp.StatusCode, test.wantCode)
+
+		})
+	}
+}
+
+func TestGetMovieHandlerErrors(t *testing.T) {
+
+	mockPool, err := pgxmock.NewPool()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mockPool.Close()
+
+	testTable := []struct {
+		name     string
+		id       string
+		wantCode int
+		useID    bool
+	}{
+		// will redirect to /v1/movies/
 		{
 			name:     "No ID provided",
 			id:       "",
-			wantCode: 404,
+			wantCode: 301,
 		},
 		{
 			name:     "Negative ID",
@@ -199,7 +299,7 @@ func TestGetAllMoviesHandler(t *testing.T) {
 			t.Logf("Path: %s, Method: %s", r.URL.Path, r.Method)
 			assert.NilError(t, err)
 
-			app := newTestApplication()
+			app := newTestApplication(mockPool)
 			// want to test with httprouter since we use it to parse context
 			app.routes().ServeHTTP(respRec, r)
 

cmd/api/main.go

@@ -33,7 +33,7 @@ const Version = "1.0.0"
 type application struct {
 	config config.ServiceConfig
 	logger *slog.Logger
-	models data.Models
+	models *data.Models
 }
 
 func run(ctx context.Context, w io.Writer, args []string) error {

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/pashagolub/pgxmock/v4 v4.9.0 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
 	golang.org/x/crypto v0.37.0 // indirect
 	golang.org/x/sync v0.13.0 // indirect

go.sum

@@ -28,6 +28,8 @@ github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dv
 github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+github.com/pashagolub/pgxmock/v4 v4.9.0 h1:itlO8nrVRnzkdMBXLs8pWUyyB2PC3Gku0WGIj/gGl7I=
+github.com/pashagolub/pgxmock/v4 v4.9.0/go.mod h1:9L57pC193h2aKRHVyiiE817avasIPZnPwPlw3JczWvM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

internal/data/models.go

@@ -3,7 +3,7 @@ package data
 import (
 	"errors"
 
-	"github.com/jackc/pgx/v5/pgxpool"
+	"git.runcible.io/learning/pulley/internal/database"
 )
 
 var (
@@ -16,8 +16,8 @@ type Models struct {
 	Movies MovieModel
 }
 
-func NewModels(pool *pgxpool.Pool) Models {
-	return Models{
-		Movies: MovieModel{pool: pool},
+func NewModels(pool database.PgxIface) *Models {
+	return &Models{
+		Movies: MovieModel{db: pool},
 	}
 }

internal/data/movies.go

@@ -5,10 +5,10 @@ import (
 	"errors"
 	"time"
 
+	"git.runcible.io/learning/pulley/internal/database"
 	"git.runcible.io/learning/pulley/internal/validator"
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgconn"
-	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 // MUST export fields to serialize them
@@ -24,13 +24,13 @@ type Movie struct {
 	// be considered zero and omitted -- and the MarshalJSON() method we just made
 	// won't be called at all.
 	// VSCode will complain though about reflection issue
-	Runtime Runtime  `json:"runtime,omitzero`
+	Runtime Runtime  `json:"runtime,omitzero"`
 	Genres  []string `json:"genres,omitzero"`
 	Version int32    `json:"version"`
 }
 
 type MovieModel struct {
-	pool *pgxpool.Pool
+	db database.PgxIface
 }
 
 func (m MovieModel) Insert(ctx context.Context, movie *Movie) error {
@@ -41,7 +41,7 @@ func (m MovieModel) Insert(ctx context.Context, movie *Movie) error {
 
 	args := []any{movie.Title, movie.Year, movie.Runtime, movie.Genres}
 
-	row := m.pool.QueryRow(ctx, query, args...)
+	row := m.db.QueryRow(ctx, query, args...)
 	// Insert is mutating the Movie struct
 	err := row.Scan(&movie.ID, &movie.CreatedAt, &movie.Version)
 	return err
@@ -68,7 +68,7 @@ func (m MovieModel) Get(ctx context.Context, id int64) (*Movie, error) {
 
 	var movie Movie
 
-	err := m.pool.QueryRow(ctx, query, id).Scan(
+	err := m.db.QueryRow(ctx, query, id).Scan(
 		// &[]byte{}, // throwaway the pg_sleep value
 		&movie.ID,
 		&movie.CreatedAt,
@@ -115,7 +115,7 @@ func (m MovieModel) Update(ctx context.Context, movie *Movie) error {
 	}
 
 	// Will not return any rows if the version number has already changed.
-	err := m.pool.QueryRow(ctx, query, args...).Scan(&movie.Version)
+	err := m.db.QueryRow(ctx, query, args...).Scan(&movie.Version)
 	if err != nil {
 		switch {
 		case errors.Is(err, pgx.ErrNoRows):
@@ -142,7 +142,7 @@ func (m MovieModel) Delete(ctx context.Context, id int64) (err error) {
 
 	query := `DELETE FROM movies WHERE id = $1`
 
-	tx, err := m.pool.BeginTx(ctx, pgx.TxOptions{})
+	tx, err := m.db.BeginTx(ctx, pgx.TxOptions{})
 	if err != nil {
 		return err
 	}
@@ -169,14 +169,21 @@ func (m MovieModel) Delete(ctx context.Context, id int64) (err error) {
 	return nil
 }
 
-func (m MovieModel) List(ctx context.Context) ([]*Movie, error) {
+func (m MovieModel) GetAll(ctx context.Context, title string, genres []string, filters Filters) ([]*Movie, error) {
 
 	query := `
 		SELECT id, created_at, title, year, runtime, genres, version
 		FROM movies
 		ORDER BY id ASC
 		`
-	rows, err := m.pool.Query(ctx, query)
+
+	// ctx want some timeout for queries. When used in the handler the context passed should
+	// be the r.Context. Since cancel functions are inherited it will cancel on client
+	// disconnect or on time out.
+	ctxTimeout, cancel := context.WithTimeout(ctx, 3*time.Second)
+	defer cancel()
+
+	rows, err := m.db.Query(ctxTimeout, query)
 	if err != nil {
 		return nil, err
 	}

internal/database/database.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"git.runcible.io/learning/pulley/internal/config"
+	pgx "github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 )
 
@@ -35,3 +36,26 @@ func OpenPgPool(ctx context.Context, cfg config.ServiceConfig) (*pgxpool.Pool, e
 	}
 	return pool, nil
 }
+
+type PgxIface interface {
+	Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error)
+	QueryRow(ctx context.Context, sql string, args ...any) pgx.Row
+	BeginTx(ctx context.Context, txOptions pgx.TxOptions) (pgx.Tx, error)
+}
+
+// TODO determine if this is even useful. Sqlc does produce
+type DBQuierier struct {
+	db *pgxpool.Pool
+}
+
+func (q *DBQuierier) Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error) {
+	return q.db.Query(ctx, sql, args...)
+}
+
+func (q *DBQuierier) QueryRow(ctx context.Context, sql string, args ...any) pgx.Row {
+	return q.db.QueryRow(ctx, sql, args...)
+}
+
+func (q *DBQuierier) BeginTx(ctx context.Context, txOptions pgx.TxOptions) (pgx.Tx, error) {
+	return q.db.BeginTx(ctx, txOptions)
+}

migrations/000001_create_movies_table.up.sql

@@ -4,7 +4,7 @@
 	title text NOT NULL,
 	year integer NOT NULL,
 	runtime integer NOT NULL,
-	genres text[] NOT NULL,
+
 	version integer NOT NULL DEFAULT 1
 );