Fixes 4108; remove hidden files in kustomize edit command to correctly mimic shell globbing behaviour (#4170)

* util and util_test corrected

* fixed behaviour of fsondisk with test updated

* glob behaviour fixed in fsnode

* removed commented code

kyaml/filesys/fsondisk_test.go

@@ -12,6 +12,7 @@ import (
 	"path"
 	"path/filepath"
 	"reflect"
+	"sort"
 	"testing"
 )
 
@@ -136,31 +137,113 @@ func TestReadFilesRealFS(t *testing.T) {
 	fSys, testDir := makeTestDir(t)
 	defer os.RemoveAll(testDir)
 
-	err := fSys.WriteFile(path.Join(testDir, "foo"), []byte(`foo`))
-	if err != nil {
-		t.Fatalf("unexpected error %s", err)
+	dir := path.Join(testDir, "dir")
+	nestedDir := path.Join(dir, "nestedDir")
+	hiddenDir := path.Join(testDir, ".hiddenDir")
+	dirs := []string{
+		testDir,
+		dir,
+		nestedDir,
+		hiddenDir,
 	}
-	if !fSys.Exists(path.Join(testDir, "foo")) {
-		t.Fatalf("expected foo")
-	}
-	if fSys.IsDir(path.Join(testDir, "foo")) {
-		t.Fatalf("expected foo not to be a directory")
+	// all directories will have all these files
+	files := []string{
+		"bar",
+		"foo",
+		"file-1.xtn",
+		".file-2.xtn",
+		".some-file-3.xtn",
+		".some-file-4.xtn",
 	}
 
-	err = fSys.WriteFile(path.Join(testDir, "bar"), []byte(`bar`))
+	err := fSys.MkdirAll(nestedDir)
 	if err != nil {
-		t.Fatalf("unexpected error %s", err)
+		t.Fatalf("Unexpected Error %v\n", err)
+	}
+	err = fSys.MkdirAll(hiddenDir)
+	if err != nil {
+		t.Fatalf("Unexpected Error %v\n", err)
 	}
 
-	files, err := fSys.Glob(path.Join("testDir", "*"))
-	expected := []string{
-		path.Join(testDir, "bar"),
-		path.Join(testDir, "foo"),
+	// adding all files in every directory that we had defined
+	for _, d := range dirs {
+		if !fSys.IsDir(d) {
+			t.Fatalf("Expected %s to be a dir\n", d)
+		}
+		for _, f := range files {
+			err = fSys.WriteFile(path.Join(d, f), []byte(f))
+			if err != nil {
+				t.Fatalf("unexpected error %s", err)
+			}
+			if !fSys.Exists(path.Join(d, f)) {
+				t.Fatalf("expected %s", f)
+			}
+		}
 	}
-	if err != nil {
-		t.Fatalf("expected no error")
+
+	tests := map[string]struct {
+		globPattern   string
+		expectedFiles []string
+		expectedDirs  map[string][]string // glob returns directories as well, so we need to add those to expected files
+	}{
+		"AllVisibleFiles": {
+			globPattern: "*",
+			expectedFiles: []string{
+				"bar",
+				"foo",
+				"file-1.xtn",
+			},
+			expectedDirs: map[string][]string{
+				testDir: []string{dir},
+				dir:     []string{nestedDir},
+			},
+		},
+		"AllHiddenFiles": {
+			globPattern: ".*",
+			expectedFiles: []string{
+				".file-2.xtn",
+				".some-file-3.xtn",
+				".some-file-4.xtn",
+			},
+			expectedDirs: map[string][]string{
+				testDir: []string{hiddenDir},
+			},
+		},
+		"foo_File": {
+			globPattern: "foo",
+			expectedFiles: []string{
+				"foo",
+			},
+		},
+		"dotsome-file_PrefixedFiles": {
+			globPattern: ".some-file*",
+			expectedFiles: []string{
+				".some-file-3.xtn",
+				".some-file-4.xtn",
+			},
+		},
 	}
-	if reflect.DeepEqual(files, expected) {
-		t.Fatalf("incorrect files found by glob: %v", files)
+
+	for n, c := range tests {
+		t.Run(n, func(t *testing.T) {
+			for _, d := range dirs {
+				var expectedPaths []string
+				for _, f := range c.expectedFiles {
+					expectedPaths = append(expectedPaths, path.Join(d, f))
+				}
+				if c.expectedDirs != nil {
+					expectedPaths = append(expectedPaths, c.expectedDirs[d]...)
+				}
+				actualPaths, globErr := fSys.Glob(path.Join(d, c.globPattern))
+				if globErr != nil {
+					t.Fatalf("Unexpected Error : %v\n", globErr)
+				}
+				sort.Strings(actualPaths)
+				sort.Strings(expectedPaths)
+				if !reflect.DeepEqual(actualPaths, expectedPaths) {
+					t.Fatalf("incorrect files found by glob: expected=%v, actual=%v", expectedPaths, actualPaths)
+				}
+			}
+		})
 	}
 }