Address kyaml windows compatibility issues

kyaml/kio/pkgio_reader.go

@@ -173,6 +173,9 @@ func (r LocalPackageReader) Read() ([]*yaml.RNode, error) {
 	if r.PackagePath == "" {
 		return nil, fmt.Errorf("must specify package path")
 	}
+
+	// use slash for path
+	r.PackagePath = filepath.ToSlash(r.PackagePath)
 	if len(r.MatchFilesGlob) == 0 {
 		r.MatchFilesGlob = DefaultMatch
 	}

kyaml/kio/pkgio_writer_test.go

@@ -10,6 +10,8 @@ import (
 	"path/filepath"
 	"testing"
 
+	"sigs.k8s.io/kustomize/kyaml/testutil"
+
 	"github.com/stretchr/testify/assert"
 	. "sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
@@ -186,7 +188,9 @@ func TestLocalPackageWriter_Write_absPath(t *testing.T) {
 	d, node1, node2, node3 := getWriterInputs(t)
 	defer os.RemoveAll(d)
 
-	node4, err := yaml.Parse(fmt.Sprintf(`e: f
+	d = filepath.ToSlash(d)
+
+	n4 := fmt.Sprintf(`e: f
 g:
   h:
   - i # has a list
@@ -195,16 +199,13 @@ metadata:
   annotations:
     config.kubernetes.io/index: a
     config.kubernetes.io/path: "%s/a/b/b_test.yaml" # use a different path, should still collide
-`, d))
-	if !assert.NoError(t, err) {
-		assert.FailNow(t, err.Error())
-	}
+`, d)
+	node4, err := yaml.Parse(n4)
+	testutil.AssertNoError(t, err, n4)
 
 	w := LocalPackageWriter{PackagePath: d}
 	err = w.Write([]*yaml.RNode{node2, node1, node3, node4})
-	if assert.Error(t, err) {
-		assert.Contains(t, err.Error(), "package paths may not be absolute paths")
-	}
+	testutil.AssertErrorContains(t, err, "package paths may not be absolute paths")
 }
 
 // TestLocalPackageWriter_Write_missingPath tests:

kyaml/kio/tree_test.go

@@ -5,6 +5,8 @@ package kio_test
 
 import (
 	"bytes"
+	"fmt"
+	"path/filepath"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -68,15 +70,15 @@ spec:
 		t.FailNow()
 	}
 
-	if !assert.Equal(t, `
+	if !assert.Equal(t, fmt.Sprintf(`
 ├── bar-package
 │   └── [f2.yaml]  Deployment bar
 └── foo-package
     ├── [f1.yaml]  Deployment default/foo
     ├── [f1.yaml]  Service default/foo
-    └── foo-package/3
+    └── foo-package%s3
         └── [f3.yaml]  Deployment default/foo
-`, out.String()) {
+`, string(filepath.Separator)), out.String()) {
 		t.FailNow()
 	}
 }