Add more test cases

Author: tchap

pkg/operator/staticpod/certsyncpod/certsync_controller_test.go

@@ -120,6 +120,29 @@ func TestWriteFiles(t *testing.T) {
 			},
 			checkState: checkOnSuccess,
 		},
+		{
+			name:          "target directory is empty",
+			newFS:         newRealFS,
+			directoryData: map[string][]byte{},
+			objectData: map[string][]byte{
+				"tls.crt": []byte("TLS cert"),
+				"tls.key": []byte("TLS key"),
+			},
+			checkState: checkOnSuccess,
+		},
+		{
+			name:  "target directory already synchronized",
+			newFS: newRealFS,
+			directoryData: map[string][]byte{
+				"tls.crt": []byte("TLS cert"),
+				"tls.key": []byte("TLS key"),
+			},
+			objectData: map[string][]byte{
+				"tls.crt": []byte("TLS cert"),
+				"tls.key": []byte("TLS key"),
+			},
+			checkState: checkOnSuccess,
+		},
 		{
 			name:  "change file contents preserving the filenames",
 			newFS: newRealFS,
@@ -198,6 +221,43 @@ func TestWriteFiles(t *testing.T) {
 			},
 			checkState: checkOnSuccess,
 		},
+		{
+			name:  "add new files",
+			newFS: newRealFS,
+			directoryData: map[string][]byte{
+				"tls.crt": []byte("TLS cert"),
+				"tls.key": []byte("TLS key"),
+			},
+			objectData: map[string][]byte{
+				"tls.crt":         []byte("TLS cert"),
+				"tls.key":         []byte("TLS key"),
+				"another_tls.crt": []byte("another TLS cert"),
+				"another_tls.key": []byte("another TLS key"),
+			},
+			checkState: checkOnSuccess,
+		},
+		{
+			name:  "delete a single file",
+			newFS: newRealFS,
+			directoryData: map[string][]byte{
+				"1.txt": []byte("1"),
+				"2.txt": []byte("2"),
+			},
+			objectData: map[string][]byte{
+				"1.txt": []byte("1"),
+			},
+			checkState: checkOnSuccess,
+		},
+		{
+			name:  "delete all files",
+			newFS: newRealFS,
+			directoryData: map[string][]byte{
+				"1.txt": []byte("1"),
+				"2.txt": []byte("2"),
+			},
+			objectData: map[string][]byte{},
+			checkState: checkOnSuccess,
+		},
 		errorTestCase("directory unchanged on failed to create object directory", func() *fileSystem {
 			fs := newRealFS()
 			fs.MkdirAll = func(path string, perm os.FileMode) error {