Merge pull request #16 from matryer/counters

Counters and imports

.travis.yml

@@ -3,7 +3,8 @@ language: go
 sudo: false
 
 go:
-  - 1.7.1
+  - 1.7.x
+  - 1.8.x
   - tip
 
 before_install:

README.md

@@ -63,12 +63,10 @@ This this example, Moq generated the `EmailSenderMock` type:
 ```go
 func TestCompleteSignup(t *testing.T) {
 
-	called := false
 	var sentTo string 
 
 	mockedEmailSender = &EmailSenderMock{
 		SendFunc: func(to, subject, body string) error {
-			called = true
 			sentTo = to
 			return nil
 		},
@@ -76,8 +74,8 @@ func TestCompleteSignup(t *testing.T) {
 
 	CompleteSignUp("me@email.com", mockedEmailSender)
 
-	if called == false {
-		t.Error("Sender.Send expected")
+	if mockedEmailSender.CallsTo.Send != 1 {
+		t.Errorf("Send was called %d times", mockedEmailSender.CallsTo.Send)
 	}
 	if sentTo != "me@email.com" {
 		t.Errorf("unexpected recipient: %s", sentTo)
@@ -95,8 +93,11 @@ The mocked structure implements the interface, where each method calls the assoc
 ## Tips
 
 * Keep mocked logic inside the test that is using it
-* Only mock the fields you need - it will panic if a nil function gets called
+* Only mock the fields you need
+* It will panic if a nil function gets called
+* Name arguments in the interface for a better experience
 * Use closured variables inside your test function to capture details about the calls to the methods
+* Use `.CallsTo.Method` to track the calls
 * Use `go:generate` to invoke the `moq` command
 
 ## License

package/moq/importer.go

@@ -0,0 +1,145 @@
+package moq
+
+// taken from https://github.com/ernesto-jimenez/gogen
+// Copyright (c) 2015 Ernesto Jiménez
+
+import (
+	"fmt"
+	"go/ast"
+	"go/importer"
+	"go/parser"
+	"go/token"
+	"go/types"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+type customImporter struct {
+	imported      map[string]*types.Package
+	base          types.Importer
+	skipTestFiles bool
+}
+
+func (i *customImporter) Import(path string) (*types.Package, error) {
+	var err error
+	if path == "" || path[0] == '.' {
+		path, err = filepath.Abs(filepath.Clean(path))
+		if err != nil {
+			return nil, err
+		}
+		path = stripGopath(path)
+	}
+	if pkg, ok := i.imported[path]; ok {
+		return pkg, nil
+	}
+	pkg, err := i.fsPkg(path)
+	if err != nil {
+		return nil, err
+	}
+	i.imported[path] = pkg
+	return pkg, nil
+}
+
+func gopathDir(pkg string) (string, error) {
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		absPath, err := filepath.Abs(path.Join(gopath, "src", pkg))
+		if err != nil {
+			return "", err
+		}
+		if dir, err := os.Stat(absPath); err == nil && dir.IsDir() {
+			return absPath, nil
+		}
+	}
+	return "", fmt.Errorf("%s not in $GOPATH", pkg)
+}
+
+func removeGopath(p string) string {
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		p = strings.Replace(p, path.Join(gopath, "src")+"/", "", 1)
+	}
+	return p
+}
+
+func (i *customImporter) fsPkg(pkg string) (*types.Package, error) {
+	dir, err := gopathDir(pkg)
+	if err != nil {
+		return importOrErr(i.base, pkg, err)
+	}
+
+	dirFiles, err := ioutil.ReadDir(dir)
+	if err != nil {
+		return importOrErr(i.base, pkg, err)
+	}
+
+	fset := token.NewFileSet()
+	var files []*ast.File
+	for _, fileInfo := range dirFiles {
+		if fileInfo.IsDir() {
+			continue
+		}
+		n := fileInfo.Name()
+		if path.Ext(fileInfo.Name()) != ".go" {
+			continue
+		}
+		if i.skipTestFiles && strings.Contains(fileInfo.Name(), "_test.go") {
+			continue
+		}
+		file := path.Join(dir, n)
+		src, err := ioutil.ReadFile(file)
+		if err != nil {
+			return nil, err
+		}
+		f, err := parser.ParseFile(fset, file, src, 0)
+		if err != nil {
+			return nil, err
+		}
+		files = append(files, f)
+	}
+	conf := types.Config{
+		Importer: i,
+	}
+	p, err := conf.Check(pkg, fset, files, nil)
+
+	if err != nil {
+		return importOrErr(i.base, pkg, err)
+	}
+	return p, nil
+}
+
+func importOrErr(base types.Importer, pkg string, err error) (*types.Package, error) {
+	p, impErr := base.Import(pkg)
+	if impErr != nil {
+		return nil, err
+	}
+	return p, nil
+}
+
+// newImporter returns an importer that will try to import code from gopath before using go/importer.Default and skipping test files
+func newImporter() types.Importer {
+	return &customImporter{
+		imported:      make(map[string]*types.Package),
+		base:          importer.Default(),
+		skipTestFiles: true,
+	}
+}
+
+// // DefaultWithTestFiles same as Default but it parses test files too
+// func DefaultWithTestFiles() types.Importer {
+// 	return &customImporter{
+// 		imported:      make(map[string]*types.Package),
+// 		base:          importer.Default(),
+// 		skipTestFiles: false,
+// 	}
+// }
+
+// stripGopath teks the directory to a package and remove the gopath to get the
+// cannonical package name
+func stripGopath(p string) string {
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		p = strings.Replace(p, path.Join(gopath, "src")+"/", "", 1)
+	}
+	return p
+}

package/moq/moq.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"go/ast"
-	"go/importer"
 	"go/parser"
 	"go/token"
 	"go/types"
@@ -21,6 +20,8 @@ type Mocker struct {
 	fset    *token.FileSet
 	pkgs    map[string]*ast.Package
 	pkgName string
+
+	imports map[string]bool
 }
 
 // New makes a new Mocker for the specified package directory.
@@ -45,7 +46,7 @@ func New(src, packageName string) (*Mocker, error) {
 	if len(packageName) == 0 {
 		return nil, errors.New("failed to determine package name")
 	}
-	tmpl, err := template.New("moq").Parse(moqTemplate)
+	tmpl, err := template.New("moq").Funcs(templateFuncs).Parse(moqTemplate)
 	if err != nil {
 		return nil, err
 	}
@@ -55,6 +56,7 @@ func New(src, packageName string) (*Mocker, error) {
 		fset:    fset,
 		pkgs:    pkgs,
 		pkgName: packageName,
+		imports: make(map[string]bool),
 	}, nil
 }
 
@@ -63,7 +65,10 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 	if len(name) == 0 {
 		return errors.New("must specify one interface")
 	}
-	var objs []*obj
+	doc := doc{
+		PackageName: m.pkgName,
+		Imports:     moqImports,
+	}
 	for _, pkg := range m.pkgs {
 		i := 0
 		files := make([]*ast.File, len(pkg.Files))
@@ -71,7 +76,7 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 			files[i] = file
 			i++
 		}
-		conf := types.Config{Importer: importer.Default()}
+		conf := types.Config{Importer: newImporter()}
 		tpkg, err := conf.Check(m.src, m.fset, files, nil)
 		if err != nil {
 			return err
@@ -85,7 +90,7 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 				return fmt.Errorf("%s (%s) not an interface", n, iface.Type().String())
 			}
 			iiface := iface.Type().Underlying().(*types.Interface).Complete()
-			obj := &obj{
+			obj := obj{
 				InterfaceName: n,
 			}
 			for i := 0; i < iiface.NumMethods(); i++ {
@@ -98,16 +103,13 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 				method.Params = m.extractArgs(sig, sig.Params(), "in%d")
 				method.Returns = m.extractArgs(sig, sig.Results(), "out%d")
 			}
-			objs = append(objs, obj)
+			doc.Objects = append(doc.Objects, obj)
 		}
 	}
-	err := m.tmpl.Execute(w, struct {
-		PackageName string
-		Objs        []*obj
-	}{
-		PackageName: m.pkgName,
-		Objs:        objs,
-	})
+	for pkgToImport := range m.imports {
+		doc.Imports = append(doc.Imports, pkgToImport)
+	}
+	err := m.tmpl.Execute(w, doc)
 	if err != nil {
 		return err
 	}
@@ -118,6 +120,7 @@ func (m *Mocker) packageQualifier(pkg *types.Package) string {
 	if m.pkgName == pkg.Name() {
 		return ""
 	}
+	m.imports[pkg.Path()] = true
 	return pkg.Name()
 }
 
@@ -143,6 +146,12 @@ func (m *Mocker) extractArgs(sig *types.Signature, list *types.Tuple, nameFormat
 	return params
 }
 
+type doc struct {
+	PackageName string
+	Objects     []obj
+	Imports     []string
+}
+
 type obj struct {
 	InterfaceName string
 	Methods       []*method
@@ -204,11 +213,30 @@ func (p param) TypeString() string {
 	return p.Type
 }
 
+var templateFuncs = template.FuncMap{
+	"Exported": func(s string) string {
+		if s == "" {
+			return ""
+		}
+		return strings.ToUpper(s[0:1]) + s[1:]
+	},
+}
+
+// moqImports are the imports all moq files get.
+var moqImports = []string{"sync"}
+
+// moqTemplate is the template for mocked code.
 var moqTemplate = `package {{.PackageName}}
 
 // AUTOGENERATED BY MOQ
 // github.com/matryer/moq
-{{ range $i, $obj := .Objs }}
+
+import (
+{{- range .Imports }}
+	"{{.}}"
+{{- end }}
+)
+{{ range $i, $obj := .Objects }}
 // {{.InterfaceName}}Mock is a mock implementation of {{.InterfaceName}}.
 //
 //     func TestSomethingThatUses{{.InterfaceName}}(t *testing.T) {
@@ -221,13 +249,38 @@ var moqTemplate = `package {{.PackageName}}
 //         }
 //
 //         // TODO: use mocked{{.InterfaceName}} in code that requires {{.InterfaceName}}
+//         //       and then make assertions.
+//         //
+//         // Use the CallsTo structure to access details about what calls were made:
+//         // 
+//         //     if len(mocked{{.InterfaceName}}.CallsTo.MethodFunc) != 1 {
+//	       //     	t.Errorf("expected 1 call there were %d", len(mocked{{.InterfaceName}}.CallsTo.MethodFunc))
+//         //     }
 //         
 //     }
 type {{.InterfaceName}}Mock struct {
 {{- range .Methods }}
 	// {{.Name}}Func mocks the {{.Name}} method.
 	{{.Name}}Func func({{ .Arglist }}) {{.ReturnArglist}}
+{{ end }}
+	// CallsTo tracks calls to the methods.
+	CallsTo struct {
+		// Enabled indicates that calls will be tracked.
+		// 
+		//     // don't track calls
+		//     {{.InterfaceName}}Mock.CallsTo.Enabled = false
+		Enabled bool		
+{{ range .Methods }}
+		lock{{.Name}} sync.Mutex // protects {{ .Name }}
+		// {{ .Name }} holds details about calls to the {{.Name}} method.
+		{{ .Name }} []struct {
+			{{- range .Params }}
+			// {{ .Name | Exported }} is the {{ .Name }} argument value.
+			{{ .Name | Exported }} {{ .Type }}
+			{{- end }}
+		}
 {{- end }}
+	}
 }
 {{ range .Methods }}
 // {{.Name}} calls {{.Name}}Func.
@@ -235,6 +288,19 @@ func (mock *{{$obj.InterfaceName}}Mock) {{.Name}}({{.Arglist}}) {{.ReturnArglist
 	if mock.{{.Name}}Func == nil {
 		panic("moq: {{$obj.InterfaceName}}Mock.{{.Name}}Func is nil but was just called")
 	}
+	if mock.CallsTo.Enabled {
+		mock.CallsTo.lock{{.Name}}.Lock()
+		mock.CallsTo.{{.Name}} = append(mock.CallsTo.{{.Name}}, struct{
+			{{- range .Params }}
+			{{ .Name | Exported }} {{ .Type }}
+			{{- end }}
+		}{
+			{{- range .Params }}
+			{{ .Name | Exported }}: {{ .Name }},
+			{{- end }}
+		})
+		mock.CallsTo.lock{{.Name}}.Unlock()
+	}
 {{- if .ReturnArglist }}
 	return mock.{{.Name}}Func({{.ArgCallList}})
 {{- else }}

package/moq/moq_test.go

@@ -9,7 +9,7 @@ import (
 func TestMoq(t *testing.T) {
 	m, err := New("testdata/example", "")
 	if err != nil {
-		t.Errorf("moq.New: %s", err)
+		t.Fatalf("moq.New: %s", err)
 	}
 	var buf bytes.Buffer
 	err = m.Mock(&buf, "PersonStore")
@@ -27,18 +27,22 @@ func TestMoq(t *testing.T) {
 		"func (mock *PersonStoreMock) Get(ctx context.Context, id string) (*Person, error)",
 		"panic(\"moq: PersonStoreMock.CreateFunc is nil but was just called\")",
 		"panic(\"moq: PersonStoreMock.GetFunc is nil but was just called\")",
+		"mock.CallsTo.lockGet.Lock()",
+		"mock.CallsTo.Get = append(mock.CallsTo.Get, struct{",
+		"mock.CallsTo.lockGet.Unlock()",
 	}
 	for _, str := range strs {
 		if !strings.Contains(s, str) {
 			t.Errorf("expected but missing: \"%s\"", str)
 		}
 	}
+
 }
 
 func TestMoqExplicitPackage(t *testing.T) {
 	m, err := New("testdata/example", "different")
 	if err != nil {
-		t.Errorf("moq.New: %s", err)
+		t.Fatalf("moq.New: %s", err)
 	}
 	var buf bytes.Buffer
 	err = m.Mock(&buf, "PersonStore")
@@ -68,7 +72,7 @@ func TestMoqExplicitPackage(t *testing.T) {
 func TestVariadicArguments(t *testing.T) {
 	m, err := New("testdata/variadic", "")
 	if err != nil {
-		t.Errorf("moq.New: %s", err)
+		t.Fatalf("moq.New: %s", err)
 	}
 	var buf bytes.Buffer
 	err = m.Mock(&buf, "Greeter")
@@ -93,7 +97,7 @@ func TestVariadicArguments(t *testing.T) {
 func TestNothingToReturn(t *testing.T) {
 	m, err := New("testdata/example", "")
 	if err != nil {
-		t.Errorf("moq.New: %s", err)
+		t.Fatalf("moq.New: %s", err)
 	}
 	var buf bytes.Buffer
 	err = m.Mock(&buf, "PersonStore")
@@ -118,7 +122,7 @@ func TestNothingToReturn(t *testing.T) {
 func TestChannelNames(t *testing.T) {
 	m, err := New("testdata/channels", "")
 	if err != nil {
-		t.Errorf("moq.New: %s", err)
+		t.Fatalf("moq.New: %s", err)
 	}
 	var buf bytes.Buffer
 	err = m.Mock(&buf, "Queuer")
@@ -131,7 +135,39 @@ func TestChannelNames(t *testing.T) {
 	}
 	for _, str := range strs {
 		if !strings.Contains(s, str) {
-			t.Errorf("expected by missing: \"%s\"", str)
+			t.Errorf("expected but missing: \"%s\"", str)
 		}
 	}
 }
+
+func TestImports(t *testing.T) {
+	m, err := New("testdata/imports/two", "")
+	if err != nil {
+		t.Fatalf("moq.New: %s", err)
+	}
+	var buf bytes.Buffer
+	err = m.Mock(&buf, "DoSomething")
+	if err != nil {
+		t.Errorf("m.Mock: %s", err)
+	}
+	s := buf.String()
+	var strs = []string{
+		`	"sync"`,
+		`	"github.com/matryer/moq/package/moq/testdata/imports/one"`,
+	}
+	for _, str := range strs {
+		if !strings.Contains(s, str) {
+			t.Errorf("expected but missing: \"%s\"", str)
+		}
+		if len(strings.Split(s, str)) > 2 {
+			t.Errorf("more than one: \"%s\"", str)
+		}
+	}
+}
+
+func TestTemplateFuncs(t *testing.T) {
+	fn := templateFuncs["Exported"].(func(string) string)
+	if fn("var") != "Var" {
+		t.Errorf("exported didn't work: %s", fn("var"))
+	}
+}

package/moq/testdata/imports/one/one.go

@@ -0,0 +1,4 @@
+package one
+
+// Thing is just a thing.
+type Thing struct{}

package/moq/testdata/imports/two/two.go

@@ -0,0 +1,11 @@
+package two
+
+import (
+	"github.com/matryer/moq/package/moq/testdata/imports/one"
+)
+
+// DoSomething does something.
+type DoSomething interface {
+	Do(thing one.Thing) error
+	Another(thing one.Thing) error
+}