Fix: avoid package name collision with inPackage (#291)

pkg/fixtures/example_project/bar/foo/client.go

@@ -0,0 +1,5 @@
+package foo
+
+type Client interface {
+	Search(query string) ([]string, error)
+}

pkg/fixtures/example_project/context/context.go

@@ -0,0 +1,9 @@
+package context
+
+import (
+	"context"
+)
+
+type CollideWithStdLib interface {
+	NewClient(ctx context.Context)
+}

pkg/fixtures/example_project/foo/pkg_name_same_as_import.go

@@ -0,0 +1,7 @@
+package foo
+
+import "github.com/vektra/mockery/v2/pkg/fixtures/example_project/bar/foo"
+
+type PackageNameSameAsImport interface {
+	NewClient() foo.Client
+}

pkg/generator.go

@@ -106,7 +106,8 @@ func (g *Generator) addPackageImportWithName(ctx context.Context, path, name str
 }
 
 func (g *Generator) getNonConflictingName(path, name string) string {
-	if !g.importNameExists(name) {
+	if !g.importNameExists(name) && (!g.InPackage || g.iface.Pkg.Name() != name) {
+		// do not allow imports with the same name as the package when inPackage
 		return name
 	}
 
@@ -123,7 +124,8 @@ func (g *Generator) getNonConflictingName(path, name string) string {
 	var prospectiveName string
 	for i := 1; i <= numDirectories; i++ {
 		prospectiveName = strings.Join(cleanedDirectories[numDirectories-i:], "")
-		if !g.importNameExists(prospectiveName) {
+		if !g.importNameExists(prospectiveName) && (!g.InPackage || g.iface.Pkg.Name() != prospectiveName) {
+			// do not allow imports with the same name as the package when inPackage
 			return prospectiveName
 		}
 	}

pkg/generator_test.go

@@ -1774,15 +1774,15 @@ func (s *GeneratorSuite) TestKeepTreeInPackageCombined() {
 	tests := []testData{
 		{path: filepath.Join("example_project", "root.go"), name: "Root", expected: `package example_project
 
-import example_project "github.com/vektra/mockery/v2/pkg/fixtures/example_project"
+import fixturesexample_project "github.com/vektra/mockery/v2/pkg/fixtures/example_project"
 import foo "github.com/vektra/mockery/v2/pkg/fixtures/example_project/foo"
 import mock "github.com/stretchr/testify/mock"
 import testing "testing"
 
 `},
 		{path: filepath.Join("example_project", "foo", "foo.go"), name: "Foo", expected: `package foo
 
-import foo "github.com/vektra/mockery/v2/pkg/fixtures/example_project/foo"
+import example_projectfoo "github.com/vektra/mockery/v2/pkg/fixtures/example_project/foo"
 import mock "github.com/stretchr/testify/mock"
 import testing "testing"
 
@@ -1800,6 +1800,40 @@ import testing "testing"
 	}
 }
 
+func (s *GeneratorSuite) TestInPackagePackageCollision() {
+	expected := `package foo
+
+import barfoo "github.com/vektra/mockery/v2/pkg/fixtures/example_project/bar/foo"
+import mock "github.com/stretchr/testify/mock"
+import testing "testing"
+
+`
+	generator := NewGenerator(
+		s.ctx,
+		config.Config{InPackage: true, LogLevel: "debug"},
+		s.getInterfaceFromFile("example_project/foo/pkg_name_same_as_import.go", "PackageNameSameAsImport"),
+		pkg,
+	)
+	s.checkPrologueGeneration(generator, expected)
+}
+
+func (s *GeneratorSuite) TestImportCollideWithStdLib() {
+	expected := `package context
+
+import context2 "context"
+import mock "github.com/stretchr/testify/mock"
+import testing "testing"
+
+`
+	generator := NewGenerator(
+		s.ctx,
+		config.Config{InPackage: true, LogLevel: "debug"},
+		s.getInterfaceFromFile("example_project/context/context.go", "CollideWithStdLib"),
+		pkg,
+	)
+	s.checkPrologueGeneration(generator, expected)
+}
+
 func TestGeneratorSuite(t *testing.T) {
 	generatorSuite := new(GeneratorSuite)
 	suite.Run(t, generatorSuite)