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graph_test.go
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graph_test.go
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// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.
package gen
import (
"fmt"
"os"
"path/filepath"
"reflect"
"testing"
"entgo.io/ent/entc/load"
"entgo.io/ent/schema/field"
"github.com/stretchr/testify/require"
)
var (
T1 = &load.Schema{
Name: "T1",
Fields: []*load.Field{
{Name: "age", Info: &field.TypeInfo{Type: field.TypeInt}, Optional: true},
{Name: "expired_at", Info: &field.TypeInfo{Type: field.TypeTime}, Nillable: true, Optional: true},
{Name: "name", Info: &field.TypeInfo{Type: field.TypeString}, Default: true},
},
Edges: []*load.Edge{
{Name: "t2", Type: "T2", Required: true},
{Name: "t1", Type: "T1", Unique: true},
// Bidirectional unique edge (unique/"has-a" in both sides).
{Name: "t2_o2o", Type: "T2", Unique: true},
// Unidirectional non-unique edge ("has-many"). The reference is on the "many" side.
// For example: A user "has-many" books, but a book "has-an" owner (and only one).
{Name: "o2m", Type: "T2"},
// Unidirectional unique edge ("has-one").
// For example: A user "has-an" address (and only one), but an address "has-many" users.
{Name: "m2o", Type: "T2", Unique: true},
// Bidirectional unique edge ("has-one" in T1 side, and "has-many" in T2 side).
{Name: "t2_m2o", Type: "T2", Unique: true},
// Bidirectional non-unique edge ("has-many" in T1 side, and "has-one" in T2 side).
{Name: "t2_o2m", Type: "T2"},
// Bidirectional non-unique edge ("has-many" in both side).
{Name: "t2_m2m", Type: "T2"},
// Unidirectional non-unique edge for the same type.
{Name: "t1_m2m", Type: "T1"},
},
}
T2 = &load.Schema{
Name: "T2",
Annotations: dict("GQL", map[string]string{"Name": "T2"}),
Fields: []*load.Field{
{Name: "active", Info: &field.TypeInfo{Type: field.TypeBool}},
},
Edges: []*load.Edge{
{Name: "t1", Type: "T1", RefName: "t2", Inverse: true},
{Name: "t1_o2o", Type: "T1", RefName: "t2_o2o", Unique: true, Inverse: true},
{Name: "t1_o2m", Type: "T1", RefName: "t2_m2o", Inverse: true},
{Name: "t1_m2o", Type: "T1", RefName: "t2_o2m", Unique: true, Inverse: true},
{Name: "t1_m2m", Type: "T1", RefName: "t2_m2m", Inverse: true},
{Name: "t2_m2m_from", Type: "T2", Ref: &load.Edge{Name: "t2_m2m_to", Type: "T2", Annotations: dict("GQL", map[string]string{"Name": "To"})}, Inverse: true, Annotations: dict("GQL", map[string]string{"Name": "From"})},
},
}
)
func TestNewGraph(t *testing.T) {
require := require.New(t)
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, T1)
require.Error(err, "should fail due to missing types")
graph, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, T1, T2)
require.NoError(err)
require.NotNil(graph)
require.Len(graph.Nodes, 2)
t1 := graph.Nodes[0]
// check fields.
require.Equal("T1", t1.Name)
require.Len(t1.Fields, 3)
for i, name := range []string{"age", "expired_at", "name"} {
require.Equal(name, t1.Fields[i].Name)
}
for i, typ := range []string{"int", "time.Time", "string"} {
require.Equal(typ, t1.Fields[i].Type.String())
}
for i, optional := range []bool{true, true, false} {
require.Equal(optional, t1.Fields[i].Optional)
}
for i, nullable := range []bool{false, true, false} {
require.Equal(nullable, t1.Fields[i].Nillable)
}
for i, value := range []bool{false, false, true} {
require.Equal(value, t1.Fields[i].Default)
}
// check edges.
require.Len(t1.Edges, 9)
for i, name := range []string{"t2", "t1"} {
require.Equal(name, t1.Edges[i].Name)
}
for i, typ := range []*Type{graph.Nodes[1], graph.Nodes[0]} {
require.Equal(typ, t1.Edges[i].Type, "edge should point to the right type")
}
for i, optional := range []bool{false, true} {
require.Equal(optional, t1.Edges[i].Optional)
}
for i, unique := range []bool{false, true} {
require.Equal(unique, t1.Edges[i].Unique)
}
for i, inverse := range []bool{false, false} {
require.Equal(inverse, t1.Edges[i].IsInverse())
}
t2 := graph.Nodes[1]
require.Equal(map[string]string{"Name": "T2"}, t2.Annotations["GQL"])
f1, e1 := t2.Fields[0], t2.Edges[0]
require.Equal("bool", f1.Type.String())
require.Equal("active", f1.Name)
require.Equal("t1", e1.Name)
require.True(e1.IsInverse())
require.Equal("t2", e1.Inverse)
require.Equal(graph.Nodes[0], e1.Type)
require.Equal("t2_m2m_from", t2.Edges[5].Name)
require.Equal("t2_m2m_to", t2.Edges[5].Inverse)
require.Equal("t2_m2m_to", t2.Edges[6].Name)
require.Empty(t2.Edges[6].Inverse)
require.Equal(t2.Edges[6], t2.Edges[5].Ref)
require.Equal(t2.Edges[5], t2.Edges[6].Ref)
require.Equal(map[string]string{"Name": "From"}, t2.Edges[5].Annotations["GQL"])
require.Equal(map[string]string{"Name": "To"}, t2.Edges[6].Annotations["GQL"])
}
func TestNewGraphRequiredLoop(t *testing.T) {
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, &load.Schema{
Name: "T1",
Edges: []*load.Edge{
{Name: "parent", Type: "T1", Unique: true, Required: true},
{Name: "children", Type: "T1", Inverse: true, RefName: "parent", Required: true},
},
})
require.Error(t, err, "require loop")
_, err = NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]},
&load.Schema{
Name: "User",
Edges: []*load.Edge{
{Name: "pets", Type: "Pet", Required: true},
},
},
&load.Schema{
Name: "Pet",
Edges: []*load.Edge{
{Name: "owner", Type: "User", Inverse: true, RefName: "pets", Unique: true, Required: true},
},
})
require.Error(t, err, "require loop")
}
func TestNewGraphBadInverse(t *testing.T) {
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]},
&load.Schema{
Name: "User",
Edges: []*load.Edge{
{Name: "pets", Type: "Pet"},
{Name: "groups", Type: "Group"},
},
},
&load.Schema{
Name: "Pet",
Edges: []*load.Edge{
{Name: "owner", Type: "User", Unique: true, Required: true, RefName: "pets", Inverse: true},
},
},
&load.Schema{
Name: "Group",
Edges: []*load.Edge{
{Name: "users", Type: "User", RefName: "pets", Inverse: true},
},
})
require.Errorf(t, err, "mismatch type for back-reference")
}
func TestNewGraphDuplicateEdges(t *testing.T) {
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]},
&load.Schema{
Name: "User",
Edges: []*load.Edge{
{Name: "groups", Type: "Group"},
{Name: "groups", Type: "Group", RefName: "owner", Inverse: true},
},
},
&load.Schema{
Name: "Group",
Edges: []*load.Edge{
{Name: "users", Type: "User", RefName: "groups", Inverse: true},
{Name: "owner", Type: "User", Unique: true},
},
})
require.EqualError(t, err, `entc/gen: User schema contains multiple "groups" edges`)
}
func TestNewGraphDuplicateEdgeField(t *testing.T) {
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]},
&load.Schema{
Name: "User",
Fields: []*load.Field{
{Name: "parent", Info: &field.TypeInfo{Type: field.TypeInt}},
},
Edges: []*load.Edge{
{Name: "parent", Type: "User"},
},
})
require.EqualError(t, err, `entc/gen: User schema can't contain field and edge with the same name "parent"`)
}
func TestRelation(t *testing.T) {
require := require.New(t)
_, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, T1)
require.Error(err, "should fail due to missing types")
graph, err := NewGraph(&Config{Package: "entc/gen"}, T1, T2)
require.NoError(err)
require.NotNil(graph)
require.Len(graph.Nodes, 2)
t1, t2 := graph.Nodes[0], graph.Nodes[1]
// unidirectional one 2 one.
require.Equal(O2O, t1.Edges[1].Rel.Type)
// bidirectional one to one.
require.Equal(O2O, t1.Edges[2].Rel.Type)
require.Equal(O2O, t2.Edges[1].Rel.Type)
// unidirectional one 2 many.
require.Equal(O2M, t1.Edges[3].Rel.Type)
// unidirectional many 2 one.
require.Equal(M2O, t1.Edges[4].Rel.Type)
// bidirectional many 2 one.
require.Equal(M2O, t1.Edges[5].Rel.Type)
require.Equal(O2M, t2.Edges[2].Rel.Type)
// bidirectional one 2 many.
require.Equal(O2M, t1.Edges[6].Rel.Type)
require.Equal(M2O, t2.Edges[3].Rel.Type)
// bidirectional many 2 many.
require.Equal(M2M, t1.Edges[7].Rel.Type)
require.Equal(M2M, t2.Edges[4].Rel.Type)
// unidirectional many 2 many.
require.Equal(M2M, t1.Edges[8].Rel.Type)
}
func TestFKColumns(t *testing.T) {
user := &load.Schema{
Name: "User",
Edges: []*load.Edge{
{Name: "pets", Type: "Pet"},
{Name: "pet", Type: "Pet", Unique: true},
{Name: "parent", Type: "User", Unique: true},
},
}
require := require.New(t)
graph, err := NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, user, &load.Schema{Name: "Pet"})
require.NoError(err)
t1 := graph.Nodes[0]
for i, r := range []Relation{
{Type: O2M, Table: "pets", Columns: []string{"user_pets"}},
{Type: M2O, Table: "users", Columns: []string{"user_pet"}},
{Type: O2O, Table: "users", Columns: []string{"user_parent"}},
} {
require.Equal(r.Type, t1.Edges[i].Rel.Type)
require.Equal(r.Table, t1.Edges[i].Rel.Table)
require.Equal(r.Columns, t1.Edges[i].Rel.Columns)
}
// Adding inverse edges.
graph, err = NewGraph(&Config{Package: "entc/gen", Storage: drivers[0]}, user,
&load.Schema{
Name: "Pet",
Edges: []*load.Edge{
{Name: "owner", Type: "User", RefName: "pets", Inverse: true, Unique: true},
{Name: "team", Type: "User", RefName: "pet", Inverse: true},
},
},
)
require.NoError(err)
t1, t2 := graph.Nodes[0], graph.Nodes[1]
for i, r := range []Relation{
{Type: O2M, Table: "pets", Columns: []string{"user_pets"}},
{Type: M2O, Table: "users", Columns: []string{"user_pet"}},
} {
require.Equal(r.Type, t1.Edges[i].Rel.Type)
require.Equal(r.Table, t1.Edges[i].Rel.Table)
require.Equal(r.Columns, t1.Edges[i].Rel.Columns)
}
for i, r := range []Relation{
{Type: M2O, Table: "pets", Columns: []string{"user_pets"}},
{Type: O2M, Table: "users", Columns: []string{"user_pet"}},
} {
require.Equal(r.Type, t2.Edges[i].Rel.Type)
require.Equal(r.Table, t2.Edges[i].Rel.Table)
require.Equal(r.Columns, t2.Edges[i].Rel.Columns)
}
}
func TestGraph_Gen(t *testing.T) {
require := require.New(t)
target := filepath.Join(os.TempDir(), "ent")
require.NoError(os.MkdirAll(target, os.ModePerm), "creating tmpdir")
defer os.RemoveAll(target)
external := MustParse(NewTemplate("external").Parse("package external"))
graph, err := NewGraph(&Config{
Package: "entc/gen",
Target: target,
Storage: drivers[0],
Templates: []*Template{external},
IDType: &field.TypeInfo{Type: field.TypeInt},
Features: AllFeatures,
}, &load.Schema{
Name: "T1",
Fields: []*load.Field{
{Name: "age", Info: &field.TypeInfo{Type: field.TypeInt}, Optional: true},
{Name: "expired_at", Info: &field.TypeInfo{Type: field.TypeTime}, Nillable: true, Optional: true},
{Name: "name", Info: &field.TypeInfo{Type: field.TypeString}},
},
Edges: []*load.Edge{
{Name: "t1", Type: "T1", Unique: true},
},
})
require.NoError(err)
require.NotNil(graph)
require.NoError(graph.Gen())
// ensure graph files were generated.
for _, name := range []string{"ent", "client", "config"} {
_, err := os.Stat(fmt.Sprintf("%s/%s.go", target, name))
require.NoError(err)
}
// ensure entity files were generated.
for _, format := range []string{"%s", "%s_create", "%s_update", "%s_delete", "%s_query"} {
_, err := os.Stat(fmt.Sprintf(fmt.Sprintf("%s/%s.go", target, format), "t1"))
require.NoError(err)
}
_, err = os.Stat(filepath.Join(target, "external.go"))
require.NoError(err)
// Generated feature templates.
_, err = os.Stat(filepath.Join(target, "internal", "schema.go"))
require.NoError(err)
_, err = os.Stat(filepath.Join(target, "internal", "schemaconfig.go"))
require.NoError(err)
// Rerun codegen with only one feature-flag.
graph.Features = []Feature{FeatureSnapshot}
require.NoError(graph.Gen())
// Generated feature templates.
_, err = os.Stat(filepath.Join(target, "internal", "schema.go"))
require.NoError(err)
_, err = os.Stat(filepath.Join(target, "internal", "schemaconfig.go"))
require.True(os.IsNotExist(err))
// Rerun codegen without any feature-flags.
graph.Features = nil
require.NoError(graph.Gen())
_, err = os.Stat(filepath.Join(target, "internal"))
require.True(os.IsNotExist(err))
}
func ensureStructTag(name string) Hook {
return func(next Generator) Generator {
return GenerateFunc(func(g *Graph) error {
// Ensure all fields have a specific tag.
for _, node := range g.Nodes {
for _, f := range node.Fields {
tag := reflect.StructTag(f.StructTag)
if _, ok := tag.Lookup(name); !ok {
return fmt.Errorf("struct tag %q is missing for field %s.%s", name, node.Name, f.Name)
}
}
}
return next.Generate(g)
})
}
}
func TestGraph_Hooks(t *testing.T) {
require := require.New(t)
graph, err := NewGraph(&Config{
Package: "entc/gen",
Storage: drivers[0],
IDType: &field.TypeInfo{Type: field.TypeInt},
Hooks: []Hook{ensureStructTag("yaml")},
}, &load.Schema{
Name: "T1",
Fields: []*load.Field{
{Name: "age", Info: &field.TypeInfo{Type: field.TypeInt}, Optional: true},
{Name: "expired_at", Info: &field.TypeInfo{Type: field.TypeTime}, Nillable: true, Optional: true},
{Name: "name", Info: &field.TypeInfo{Type: field.TypeString}},
},
Edges: []*load.Edge{
{Name: "t1", Type: "T1", Unique: true},
},
})
require.NoError(err)
require.NotNil(graph)
require.EqualError(graph.Gen(), `struct tag "yaml" is missing for field T1.age`)
}
func TestDependencyAnnotation_Build(t *testing.T) {
tests := []struct {
typ *field.TypeInfo
field string
}{
{
typ: &field.TypeInfo{
Ident: "*http.Client",
},
field: "HTTPClient",
},
{
typ: &field.TypeInfo{
Ident: "[]*http.Client",
RType: &field.RType{
Kind: reflect.Slice,
},
},
field: "HTTPClients",
},
{
typ: &field.TypeInfo{
Ident: "[]*url.URL",
RType: &field.RType{
Kind: reflect.Slice,
},
},
field: "URLs",
},
{
typ: &field.TypeInfo{
Ident: "*net.Conn",
},
field: "NetConn",
},
}
for _, tt := range tests {
d := &Dependency{Type: tt.typ}
require.NoError(t, d.Build())
require.Equal(t, tt.field, d.Field)
}
}