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main_test.go
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main_test.go
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package main_test
import (
"context"
"testing"
"todo"
"todo/ent"
"todo/ent/migrate"
"todo/ent/user"
"ariga.io/entcache"
"entgo.io/ent/dialect"
"entgo.io/ent/dialect/sql"
gqlclient "github.com/99designs/gqlgen/client"
"github.com/99designs/gqlgen/graphql"
"github.com/99designs/gqlgen/graphql/handler"
_ "github.com/mattn/go-sqlite3"
)
func TestContextLevel(t *testing.T) {
db, err := sql.Open(dialect.SQLite, "file:ent?mode=memory&cache=shared&_fk=1")
if err != nil {
t.Fatal("opening database", err)
}
ctx := context.Background()
// Run the migration without the debug information.
if err := ent.NewClient(ent.Driver(db)).Schema.Create(ctx, migrate.WithGlobalUniqueID(true)); err != nil {
t.Fatal("running schema migration", err)
}
// Wraps the driver with a query counter.
q := &queryCount{Driver: db}
// Wrap the driver with a cache driver, and configure
// it to work in a context-level mode.
drv := entcache.NewDriver(q, entcache.ContextLevel())
client := ent.NewClient(ent.Driver(drv))
parent := client.Todo.Create().SetText("parent").SaveX(ctx)
children := client.Todo.CreateBulk(
client.Todo.Create().SetText("child-1").SetParent(parent),
client.Todo.Create().SetText("child-2").SetParent(parent),
client.Todo.Create().SetText("child-3").SetParent(parent),
).SaveX(ctx)
client.User.CreateBulk(
client.User.Create().SetName("a8m").AddTodos(parent, children[1]),
client.User.Create().SetName("nati").AddTodos(children[2:]...),
).ExecX(ctx)
ids := client.User.Query().IDsX(ctx)
t.Run("WithoutCache", func(t *testing.T) {
q.expectCount(t, 3, func() {
client.User.Query().
Where(user.IDIn(ids...)).
WithTodos(func(q *ent.TodoQuery) {
q.WithOwner()
}).
AllX(ctx)
})
})
t.Run("WithCache", func(t *testing.T) {
ctx := entcache.NewContext(ctx)
q.expectCount(t, 2, func() {
client.User.Query().
Where(user.IDIn(ids...)).
WithTodos(func(q *ent.TodoQuery) {
q.WithOwner()
}).
AllX(ctx)
})
})
// Demonstrate the usage with GraphQL.
t.Run("GQL", func(t *testing.T) {
const query = `query($ids: [ID!]!) {
nodes(ids: $ids) {
... on User {
id
todos {
id
owner {
id
name
}
}
}
}
}`
// Load the ent_types table on the first Node query.
if _, err := client.Noders(ctx, ids); err != nil {
t.Fatal(err)
}
t.Run("WithoutCache", func(t *testing.T) {
var (
rsp any
srv = handler.NewDefaultServer(todo.NewSchema(client))
gql = gqlclient.New(srv)
)
q.expectCount(t, 3, func() {
if err := gql.Post(query, &rsp, gqlclient.Var("ids", ids)); err != nil {
t.Fatal(err)
}
})
})
t.Run("WithCache", func(t *testing.T) {
var (
rsp any
srv = handler.NewDefaultServer(todo.NewSchema(client))
gql = gqlclient.New(srv)
)
srv.AroundResponses(func(ctx context.Context, next graphql.ResponseHandler) *graphql.Response {
return next(entcache.NewContext(ctx))
})
q.expectCount(t, 2, func() {
if err := gql.Post(query, &rsp, gqlclient.Var("ids", ids)); err != nil {
t.Fatal(err)
}
})
})
})
}
type queryCount struct {
n int
dialect.Driver
}
func (q *queryCount) Query(ctx context.Context, query string, args, v any) error {
q.n++
return q.Driver.Query(ctx, query, args, v)
}
// expectCount expects the given function to execute "n" queries.
func (q *queryCount) expectCount(t *testing.T, n int, fn func()) {
q.n = 0
fn()
if q.n != n {
t.Errorf("expect client to execute %d queries, got: %d", n, q.n)
}
}