crabshell-ui 0.1.0

Widgets, styles, layout, text layout, hit testing and invalidation for Crabshell
Documentation 
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//! Colors, fonts and styles.

use crate::{Border, Color, Font, Padding, Style};

#[test]
fn hex_parses_both_forms_in_either_case() {
  assert_eq!(Color::hex("#1e1E2e"), Color::rgb(0x1e, 0x1e, 0x2e));
  assert_eq!(Color::hex("#CDD6F480"), Color::rgba(0xcd, 0xd6, 0xf4, 0x80));
}

#[test]
fn hex_works_in_a_const() {
  const THEME: Color = Color::hex("#45475a");
  assert_eq!(THEME, Color::rgb(0x45, 0x47, 0x5a));
}

#[test]
#[should_panic(expected = "Color::hex takes")]
fn hex_rejects_a_missing_hash() {
  Color::hex("1e1e2e");
}

#[test]
#[should_panic(expected = "isn't a hex digit")]
fn hex_rejects_other_characters() {
  Color::hex("#1e1e2g");
}

#[test]
fn builders_set_their_fields_and_nothing_else() {
  const WS: Style = Style::new().padding(2, 8).radius(4.0);
  assert_eq!(
    WS,
    Style {
      padding: Some(Padding {
        vertical: 2,
        horizontal: 8
      }),
      radius: Some(4.0),
      ..Style::new()
    }
  );
  let bordered = Style::new().border(1.5, Color::rgb(1, 2, 3)).opacity(0.5);
  assert_eq!(
    bordered.border,
    Some(Border {
      width: 1.5,
      color: Color::rgb(1, 2, 3)
    })
  );
  assert_eq!(bordered.opacity, Some(0.5));
  assert_eq!(bordered.background, None);
}

#[test]
fn merge_takes_the_fields_the_top_style_sets() {
  let base = Style::new()
    .background(Color::rgb(1, 1, 1))
    .color(Color::rgb(2, 2, 2))
    .padding(2, 8);
  let hover = Style::new().background(Color::rgb(9, 9, 9));
  let merged = base.merge(hover);
  assert_eq!(merged.background, Some(Color::rgb(9, 9, 9)));
  assert_eq!(merged.color, Some(Color::rgb(2, 2, 2)));
  assert_eq!(merged.padding, base.padding);
  assert_eq!(Style::new().merge(base), base);
}

#[test]
fn only_font_and_padding_affect_layout() {
  let base = Style::new().padding(2, 8).font(Font::new("Inter", 13.0));
  assert!(
    base.same_layout(
      &base
        .background(Color::rgb(1, 2, 3))
        .radius(9.0)
        .opacity(0.1)
    )
  );
  assert!(!base.same_layout(&base.padding(3, 8)));
  assert!(!base.same_layout(&base.font(Font::new("Inter", 14.0))));
  assert!(!base.same_layout(&base.font(Font::new("Inter", 13.0).weight(700))));
}

#[test]
fn font_defaults_to_regular_weight() {
  const BOLD: Font = Font::new("Inter", 13.0).weight(700);
  assert_eq!(Font::new("Inter", 13.0).weight, 400);
  assert_eq!(BOLD.weight, 700);
  assert_eq!(BOLD.family, "Inter");
}