Auto input, auto generate input to auto test pallet functionality

[flipchan]

No description provided.

[flipchan]

support default types: bool, u32, u64, u128, addresses, f64, u8

Add a rng module to generate random input for the user.

[flipchan]

auto data with rng, also affects issue:
#8

[flipchan]

     Running `target/release/examples/test_input_gen`
u128: 178775027959014874923209709721246590756
u64: 1250344893184879350
u32: 2264555777
f64: 0.9103284860997953
f32: 0.0845471
boolean: false

[flipchan]

u128: 225864167899979897207776191162143802327
u64: 15697195152894034115
u32: 986567393
u8: 247
f64: 0.07036028431640629
f32: 0.48309267
boolean: true

[flipchan]

has rand been audited? is rand secure? Rust security researcher Shnatsel has left several comments on this in this a bit aged issue:
rust-secure-code/safety-dance#54

[flipchan]

random accoutid32 with subxt_signer schnorkel wrapper, requires subxthelper flag:
#[cfg(feature = "subxthelper")]
pub fn get_address() -> AccountId32 {

[flipchan]

u128: 159537579899660897343412367838632147051
u64: 7429441923015230314
u32: 2608842753
u8: 156
f64: 0.2547209547718835
f32: 0.7272214
boolean: false
Address: 5HjAev48u9TC5A3QAyu8WBZuWo4asVx1Z72jNoNcAWzsZpU8