phlow 3.0.0

An engine for scripting reactive browsers in Rust by adding custom views to structures
Documentation 
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use std::fmt::{self, Debug, Display, Formatter};

struct DisplayOnly;

impl Display for DisplayOnly {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.write_str("display-only")
    }
}

struct DebugOnly;

impl Debug for DebugOnly {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.write_str("debug-only")
    }
}

struct DisplayAndDebug;

impl Display for DisplayAndDebug {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.write_str("display-wins")
    }
}

impl Debug for DisplayAndDebug {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.write_str("debug-loses")
    }
}

struct Plain;

#[test]
fn try_to_string_returns_cloned_string_for_borrowed_and_owned_values() {
    let value = "hello".to_string();

    assert_eq!(
        phlow::try_to_string!(value.clone()),
        Some("hello".to_string())
    );
    assert_eq!(phlow::try_to_string!(&value), Some("hello".to_string()));
}

#[test]
fn try_to_string_uses_display_when_available_for_borrowed_and_owned_values() {
    assert_eq!(
        phlow::try_to_string!(DisplayOnly),
        Some("display-only".to_string())
    );
    assert_eq!(
        phlow::try_to_string!(&DisplayOnly),
        Some("display-only".to_string())
    );
}

#[test]
fn try_to_string_uses_debug_when_display_is_unavailable_for_borrowed_and_owned_values() {
    assert_eq!(
        phlow::try_to_string!(DebugOnly),
        Some("debug-only".to_string())
    );
    assert_eq!(
        phlow::try_to_string!(&DebugOnly),
        Some("debug-only".to_string())
    );
}

#[test]
fn try_to_string_prefers_display_over_debug_for_borrowed_and_owned_values() {
    assert_eq!(
        phlow::try_to_string!(DisplayAndDebug),
        Some("display-wins".to_string())
    );
    assert_eq!(
        phlow::try_to_string!(&DisplayAndDebug),
        Some("display-wins".to_string())
    );
}

#[test]
fn try_to_string_returns_none_for_plain_types_in_both_forms() {
    assert_eq!(phlow::try_to_string!(Plain), None);
    assert_eq!(phlow::try_to_string!(&Plain), None);
}