test: Add a test for leading zeros

Author: Muscraft

Cargo.lock

@@ -32,6 +32,7 @@ std = []
 
 [dev-dependencies]
 lexopt = "0.3.0"
+snapbox = "0.6.5"
 
 [lints]
 workspace = true

crates/anstyle/Cargo.toml

@@ -0,0 +1,16 @@
+Style { fg: Some(Ansi256(Ansi256Color(0))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(1))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(2))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(3))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(4))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(5))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(6))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(7))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(8))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(9))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(10))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(11))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(12))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(13))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(14))), bg: None, underline: None, effects: Effects() }
+Style { fg: Some(Ansi256(Ansi256Color(15))), bg: None, underline: None, effects: Effects() }

crates/anstyle/tests/no_leading_zero.vte

@@ -0,0 +1,35 @@
+use std::fmt::{Result, Write};
+
+use anstyle::{Ansi256Color, AnsiColor};
+
+#[test]
+fn no_leading_zero() -> Result {
+    let mut actual = String::new();
+    let ansi_colors = vec![
+        AnsiColor::Black,
+        AnsiColor::Red,
+        AnsiColor::Green,
+        AnsiColor::Yellow,
+        AnsiColor::Blue,
+        AnsiColor::Magenta,
+        AnsiColor::Cyan,
+        AnsiColor::White,
+        AnsiColor::BrightBlack,
+        AnsiColor::BrightRed,
+        AnsiColor::BrightGreen,
+        AnsiColor::BrightYellow,
+        AnsiColor::BrightBlue,
+        AnsiColor::BrightMagenta,
+        AnsiColor::BrightCyan,
+        AnsiColor::BrightWhite,
+    ];
+
+    for c in ansi_colors {
+        let c = Ansi256Color::from_ansi(c).on_default();
+        writeln!(actual, "{c}{c:?}{c:#}")?;
+    }
+
+    snapbox::assert_data_eq!(actual, snapbox::file!["no_leading_zero.vte": Text].raw());
+
+    Ok(())
+}