when(mockConnection.getRequestProperties()).thenReturn(properties);
        // Need to mock getRequestProperty as well since it delegates to wrapped connection
        when(mockConnection.getRequestProperty("Accept")).thenReturn("application/json");

        // Act
        ntlmConnection = new NtlmHttpURLConnection(mockConnection, mockCifsContext);

        // Assert

                buffer.append(", ");
            }
        }
        connection.setRequestProperty(key, buffer.toString());
    }

    @Override
    public String getRequestProperty(final String key) {
        return connection.getRequestProperty(key);
    }

    @Override
    public Map getRequestProperties() {
        final Map map = new HashMap();

                buffer.append(", ");
            }
        }
        this.connection.setRequestProperty(key, buffer.toString());
    }

    @Override
    public String getRequestProperty(final String key) {
        return this.connection.getRequestProperty(key);
    }

    @Override
    public Map<String, List<String>> getRequestProperties() {
        final Map<String, List<String>> map = new HashMap<>();