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// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package dig_test
import (
"bytes"
"errors"
"fmt"
"io"
"reflect"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.uber.org/dig"
"go.uber.org/dig/internal/digtest"
"go.uber.org/dig/internal/dot"
)
func TestDotGraph(t *testing.T) {
tparam := func(t reflect.Type, n string, g string, o bool) *dot.Param {
return &dot.Param{
Node: &dot.Node{
Type: t,
Name: n,
Group: g,
},
Optional: o,
}
}
tresult := func(t reflect.Type, n string, g string, gi int) *dot.Result {
return &dot.Result{
Node: &dot.Node{
Type: t,
Name: n,
Group: g,
},
GroupIndex: gi,
}
}
type t1 struct{}
type t2 struct{}
type t3 struct{}
type t4 struct{}
type t5 struct {
strings.Reader
}
type1 := reflect.TypeOf(t1{})
type2 := reflect.TypeOf(t2{})
type3 := reflect.TypeOf(t3{})
type4 := reflect.TypeOf(t4{})
type6 := reflect.Indirect(reflect.ValueOf(new(io.Reader))).Type()
type7 := reflect.Indirect(reflect.ValueOf(new(io.Writer))).Type()
p1 := tparam(type1, "", "", false)
p2 := tparam(type2, "", "", false)
p3 := tparam(type3, "", "", false)
p4 := tparam(type4, "", "", false)
r1 := tresult(type1, "", "", 0)
r2 := tresult(type2, "", "", 0)
r3 := tresult(type3, "", "", 0)
r4 := tresult(type4, "", "", 0)
r6 := tresult(type6, "", "", 0)
t.Parallel()
t.Run("create graph with one constructor", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r2},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) t2 { return t2{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("create graph with one constructor and as interface option", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r6},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) *t5 { return &t5{} }, dig.As(new(io.Reader)))
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("create graph with multiple constructors", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r2},
},
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r3},
},
{
Params: []*dot.Param{p2},
Results: []*dot.Result{r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) t2 { return t2{} })
c.RequireProvide(func(A t1) t3 { return t3{} })
c.RequireProvide(func(A t2) t4 { return t4{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("create graph with scope", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r2},
},
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r3},
},
{
Params: []*dot.Param{p2},
Results: []*dot.Result{r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) t2 { return t2{} })
s := c.Scope("test")
s.Provide(func(A t1) t3 { return t3{} })
s.Provide(func(A t2) t4 { return t4{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("create graph with child scope", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r2},
},
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r3},
},
{
Params: []*dot.Param{p2},
Results: []*dot.Result{r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) t2 { return t2{} })
s := c.Scope("parent_scope")
s.Provide(func(A t1) t3 { return t3{} })
cs := s.Scope("child_scope")
cs.Provide(func(A t2) t4 { return t4{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("constructor with multiple params and results", func(t *testing.T) {
expected := []*dot.Ctor{
{
Params: []*dot.Param{p3, p4},
Results: []*dot.Result{r1, r2},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t3, B t4) (t1, t2) { return t1{}, t2{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("param objects and result objects", func(t *testing.T) {
type in struct {
dig.In
A t1
B t2
}
type out struct {
dig.Out
C t3
D t4
}
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1, p2},
Results: []*dot.Result{r3, r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(i in) out { return out{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("nested param object",
8000
func(t *testing.T) {
type in struct {
dig.In
A t1
Nest struct {
dig.In
B t2
Nest struct {
dig.In
C t3
}
}
}
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1, p2, p3},
Results: []*dot.Result{r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(p in) t4 { return t4{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("nested result object", func(t *testing.T) {
type nested1 struct {
dig.Out
D t4
}
type nested2 struct {
dig.Out
C t3
Nest nested1
}
type out struct {
dig.Out
B t2
Nest nested2
}
expected := []*dot.Ctor{
{
Params: []*dot.Param{p1},
Results: []*dot.Result{r2, r3, r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(A t1) out { return out{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("value groups", func(t *testing.T) {
type in struct {
dig.In
D []t1 `group:"foo"`
}
type out1 struct {
dig.Out
A t1 `group:"foo"`
}
type out2 struct {
dig.Out
A t1 `group:"foo"`
}
res0 := tresult(type1, "", "foo", 0)
res1 := tresult(type1, "", "foo", 1)
expected := []*dot.Ctor{
{
Params: []*dot.Param{p2},
Results: []*dot.Result{res0},
},
{
Params: []*dot.Param{p4},
Results: []*dot.Result{res1},
},
{
GroupParams: []*dot.Group{
{
Type: type1,
Name: "foo",
Results: []*dot.Result{res0, res1},
},
},
Results: []*dot.Result{r3},
},
}
c := digtest.New(t)
c.RequireProvide(func(B t2) out1 { return out1{} })
c.RequireProvide(func(B t4) out2 { return out2{} })
c.RequireProvide(func(i in) t3 { return t3{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("value groups as", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(
func() *bytes.Buffer { return bytes.NewBufferString("foo") },
dig.As(new(io.Reader), new(io.Writer)),
dig.Group("buffs"),
)
c.RequireProvide(
func() *bytes.Buffer { return bytes.NewBufferString("bar") },
dig.As(new(io.Reader), new(io.Writer)),
dig.Group("buffs"),
)
expected := []*dot.Ctor{
{
Results: []*dot.Result{tresult(type6, "", "buffs", 0), tresult(type7, "", "buffs", 0)},
},
{
Results: []*dot.Result{tresult(type6, "", "buffs", 1), tresult(type7, "", "buffs", 1)},
},
}
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("named values", func(t *testing.T) {
type in struct {
dig.In
A t1 `name:"A"`
}
type out struct {
dig.Out
B t2 `name:"B"`
}
expected := []*dot.Ctor{
{
Params: []*dot.Param{
tparam(type1, "A", "", false),
},
Results: []*dot.Result{
tresult(type2, "B", "", 0),
},
},
}
c := digtest.New(t)
c.RequireProvide(func(i in) out { return out{B: t2{}} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
t.Run("optional dependencies", func(t *testing.T) {
type in struct {
dig.In
A t1 `name:"A" optional:"true"`
B t2 `name:"B"`
C t3 `optional:"true"`
}
par1 := tparam(type1, "A", "", true)
par2 := tparam(type2, "B", "", false)
par3 := tparam(type3, "", "", true)
expected := []*dot.Ctor{
{
Params: []*dot.Param{par1, par2, par3},
Results: []*dot.Result{r4},
},
}
c := digtest.New(t)
c.RequireProvide(func(i in) t4 { return t4{} })
dg := c.CreateGraph()
assertCtorsEqual(t, expected, dg.Ctors)
})
}
func assertCtorEqual(t *testing.T, expected *dot.Ctor, ctor *dot.Ctor) {
assert.Equal(t, expected.Params, ctor.Params)
assert.Equal(t, expected.Results, ctor.Results)
assert.NotZero(t, ctor.Line)
}
func assertCtorsEqual(t *testing.T, expected []*dot.Ctor, ctors []*dot.Ctor) {
require.Equal(t, len(expected), len(ctors))
for i, c := range ctors {
assertCtorEqual(t, expected[i], c)
}
}
func TestVisualize(t *testing.T) {
type t1 struct{}
type t2 struct{}
type t3 struct{}
type t4 struct{}
t.Parallel()
t.Run("empty graph in container", func(t *testing.T) {
c := digtest.New(t)
dig.VerifyVisualization(t, "empty", c.Container)
})
t.Run("simple graph", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(func() (t1, t2) { return t1{}, t2{} })
c.RequireProvide(func(A t1, B t2) (t3, t4) { return t3{}, t4{} })
dig.VerifyVisualization(t, "simple", c.Container)
})
t.Run("named types", func(t *testing.T) {
c := digtest.New(t)
type in struct {
dig.In
A t3 `name:"foo"`
}
type out1 struct {
dig.Out
A t1 `name:"bar"`
B t2 `name:"baz"`
}
type out2 struct {
dig.Out
A t3 `name:"foo"`
}
c.RequireProvide(func(in) out1 { return out1{} })
c.RequireProvide(func() out2 { return out2{} })
dig.VerifyVisualization(t, "named", c.Container)
})
t.Run("dig.As two types", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(
func() *bytes.Buffer {
panic("this function should not be called")
},
dig.As(new(io.Reader), new(io.Writer)))
dig.VerifyVisualization(t, "dig_as_two", c.Container)
})
t.Run("optional params", func(t *testing.T) {
c := digtest.New(t)
type in struct {
dig.In
A t1 `optional:"true"`
}
c.RequireProvide(func() t1 { return t1{} })
c.RequireProvide(func(in) t2 { return t2{} })
dig.VerifyVisualization(t, "optional", c.Container)
})
t.Run("grouped types", func(t *testing.T) {
c := digtest.New(t)
type in struct {
dig.In
A []t3 `group:"foo"`
}
type out1 struct {
dig.Out
A t3 `group:"foo"`
}
type out2 struct {
dig.Out
A t3 `group:"foo"`
}
c.RequireProvide(func() out1 { return out1{} })
c.RequireProvide(func() out2 { return out2{} })
c.RequireProvide(func(in) t2 { return t2{} })
dig.VerifyVisualization(t, "grouped", c.Container)
})
t.Run("constructor fails with an error", func(t *testing.T) {
c := digtest.New(t)
type in1 struct {
dig.In
C []t1 `group:"g1"`
}
type in2 struct {
dig.In
A []t2 `group:"g2"`
B t3 `name:"n3"`
}
type out1 struct {
dig.Out
B t3 `name:"n3"`
C t2 `group:"g2"`
}
type out2 struct {
dig.Out
D t2 `group:"g2"`
}
type out3 struct {
dig.Out
A t1 `group:"g1"`
B t2 `group:"g2"`
}
c.RequireProvide(func(in1) out1 { return out1{} })
c.RequireProvide(func(in2) t4 { return t4{} })
c.RequireProvide(func() out2 { return out2{} })
c.RequireProvide(func() (out3, error) { return out3{}, errors.New("great sadness") })
err := c.Invoke(func(t4 t4) {})
dig.VerifyVisualization(t, "error", c.Container, dig.VisualizeError(err))
t.Run("non-failing graph nodes are pruned", func(t *testing.T) {
t.Run("prune non-failing constructor result", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(func(in1) out1 { return out1{} })
c.RequireProvide(func(in2) t4 { return t4{} })
c.RequireProvide(func() (out2, error) { return out2{}, errors.New("great sadness") })
c.RequireProvide(func() out3 { return out3{} })
err := c.Invoke(func(t4 t4) {})
dig.VerifyVisualization(t, "prune_constructor_result", c.Container, dig.VisualizeError(err))
})
t.Run("if only the root node fails all node except for the root should be pruned", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(func(in1) out1 { return out1{} })
c.RequireProvide(func(in2) (t4, error) { return t4{}, errors.New("great sadness") })
c.RequireProvide(func() out2 { return out2{} })
c.RequireProvide(func() out3 { return out3{} })
err := c.Invoke(func(t4 t4) {})
dig.VerifyVisualization(t, "prune_non_root_nodes", c.Container, dig.VisualizeError(err))
})
})
})
t.Run("missing types", func(t *testing.T) {
c := digtest.New(t)
c.RequireProvide(func(A t1, B t2, C t3) t4 { return t4{} })
err := c.Invoke(func(t4 t4) {})
dig.VerifyVisualization(t, "missing", c.Container, dig.VisualizeError(err))
})
t.Run("missing dependency", func(t *testing.T) {
c := digtest.New(t)
err := c.Invoke(func(t1 t1) {})
dig.VerifyVisualization(t, "missingDep", c.Container, dig.VisualizeError(err))
})
}
func TestVisualizeErrorString(t *testing.T) {
t.Parallel()
t.Run("nil", func(t *testing.T) {
t.Parallel()
opt := dig.VisualizeError(nil)
assert.Equal(t, "VisualizeError(<nil>)", fmt.Sprint(opt))
})
t.Run("not nil", func(t *testing.T) {
t.Parallel()
opt := dig.VisualizeError(errors.New("great sadness"))
assert.Equal(t, "VisualizeError(great sadness)", fmt.Sprint(opt))
})
}