User can use array key to move cursor left/right or up/down for pre/next command.

[superxcgm]

Epic

Process

Description

For good user experience,

1. user should can use left/right arrow key to navigate cursor in input line and edit.
2. user should can use up/down to get pre/next command.

AC

Given: User input something, and cursor not on left most
When: User hit left arrow key
Then: Move cursor one character to left

Given: User input something, and cursor on left most
When: User hit left arrow key
Then: No move cursor

Given: User input something, and cursor not on right most
When: User hit right arrow key
Then: Move cursor one character to right

Given: User input something, and cursor on right most
When: User hit right arrow key
Then: No move cursor

Given: none
When: User hit up arrow key
Then: Previous input line appear

Given: none
When: User hit down arrow key
Then: Next input line appear

[superxcgm]

Those feature call interactive line edit. I use GNU readline here to get it quick. And we can implement ourselves in future.