Module proptest_types

Available on crate feature proptest1 only.

Proptest support for partial IO operations.

This module allows sequences of PartialOps to be randomly generated. These sequences can then be fed into a PartialRead, PartialWrite, PartialAsyncRead or PartialAsyncWrite.

Once proptest has identified a failing test case, it will shrink the sequence of PartialOps and find a minimal test case. This minimal case can then be used to reproduce the issue.

Basic implementations are provided for:

• generating errors some of the time
• generating PartialOp instances, given a way to generate errors.

Examples

use partial_io::proptest_types::{partial_op_strategy, interrupted_strategy};
use proptest::{collection::vec, prelude::*};

proptest! {
    #[test]
    fn proptest_something(ops: vec(partial_op_strategy(interrupted_strategy(), 128), 0..128)) {
        // Example buffer to read from, substitute with your own.
        let reader = std::io::repeat(42);
        let partial_reader = PartialRead::new(reader, ops);
        // ...

        true
    }
}

For a detailed example, see examples/buggy_write.rs in this repository.

Functions

interrupted_strategy

Returns a strategy that generates Interrupted errors 20% of the time.

interrupted_would_block_strategy

Returns a strategy that generates Interrupted errors 10% of the time and WouldBlock errors 10% of the time.

partial_op_strategy

Returns a strategy that generates PartialOp instances given a way to generate errors.

would_block_strategy

Returns a strategy that generates WouldBlock errors 20% of the time.