flowstdlib 1.0.0

The standard library of functions and flows for 'flow' programs
Documentation 
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#[doc = include_str!("sequence.md")]
#[cfg(test)]
#[allow(clippy::unwrap_used, clippy::expect_used)]
mod test {
    use std::fs::File;
    use std::io::Write;

    use serial_test::serial;
    use tempfile::tempdir;

    use super::super::super::test::execute_flow;

    // Serialized to avoid mDNS service name collision when multiple flowc
    // instances run in parallel — see https://github.com/andrewdavidmackenzie/flow/issues/2563
    #[test]
    #[serial]
    fn test_single_value_initializers() {
        let flow = r#"
flow = "sequence_test"

[[process]]
source = "lib://flowstdlib/math/sequence"
input.start = { once = 1 }
input.limit = { once = 10 }
input.step = { once = 1 }

[[process]]
source = "context://stdio/stdout"

[[connection]]
from = "sequence/number"
to = "stdout"
"#;

        let temp_dir = tempdir()
            .expect("Could not create temporary directory")
            .keep();
        let flow_filename = temp_dir.join("sequence_test.toml");
        let mut flow_file =
            File::create(&flow_filename).expect("Could not create lib manifest file");
        flow_file
            .write_all(flow.as_bytes())
            .expect("Could not write data bytes to created flow file");

        let stdout = execute_flow(&flow_filename);

        let numbers: Vec<i32> = stdout
            .lines()
            .map(|l| l.parse::<i32>().expect("Not a number"))
            .collect::<Vec<i32>>();
        assert_eq!(numbers, vec!(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
    }

    #[test]
    #[ignore = "Problem with propagating array initializers into functions inside flows, see\
    https://github.com/andrewdavidmackenzie/flow/issues/1418, \
    https://github.com/andrewdavidmackenzie/flow/issues/513 and \
    https://github.com/andrewdavidmackenzie/flow/issues/743"]
    fn test_array_initializers() {
        let flow = r#"
flow = "sequence-of-sequences"
[[process]]
source = "lib://flowstdlib/math/sequence"
input.start = {once = [0, 0]}
input.step = {once = [1, 2]}
input.limit = {once = [1, 2]}

[[process]]
source = "context://stdio/stdout"

[[connection]]
from = "sequence/number"
to = "stdout"
"#;

        let temp_dir = tempdir()
            .expect("Could not create temporary directory")
            .keep();
        let flow_filename = temp_dir.join("sequence_test.toml");
        let mut flow_file =
            File::create(&flow_filename).expect("Could not create lib manifest file");
        flow_file
            .write_all(flow.as_bytes())
            .expect("Could not write data bytes to created flow file");

        let stdout = execute_flow(&flow_filename);

        let numbers: Vec<i32> = stdout
            .lines()
            .map(|l| l.parse::<i32>().expect("Not a number"))
            .collect::<Vec<i32>>();
        assert_eq!(numbers, vec!(0, 1, 0, 2));
    }
}