diff --git a/src/format/mod.rs b/src/format/mod.rs
index 0721cea766..37d2041cd6 100644
--- a/src/format/mod.rs
+++ b/src/format/mod.rs
@@ -522,7 +522,7 @@ pub enum Colon {
}
/// Prints an offset from UTC with the format defined in the `UtcOffsetFormat`.
-#[cfg(any(feature = "alloc", feature = "std"))]
+#[cfg(any(feature = "alloc", feature = "std", test))]
impl UtcOffsetFormat {
fn format(&self, result: &mut String, off: FixedOffset) -> fmt::Result {
let off = off.local_minus_utc();
@@ -575,7 +575,7 @@ impl UtcOffsetFormat {
}
}
-#[cfg(any(feature = "alloc", feature = "std"))]
+#[cfg(any(feature = "alloc", feature = "std", test))]
#[allow(clippy::too_many_arguments)]
fn write_offsets(
w: &mut impl Write,
@@ -1209,3 +1209,162 @@ impl FromStr for Month {
}
}
}
+
+#[cfg(test)]
+mod tests {
+ use crate::format::{Colon, OffsetPrecision, Pad, UtcOffsetFormat};
+ use crate::FixedOffset;
+
+ #[test]
+ fn test_offset_formatting() {
+ fn check_all(precision: OffsetPrecision, expected: [[&str; 7]; 12]) {
+ fn check(
+ precision: OffsetPrecision,
+ colons: Colon,
+ padding: Pad,
+ allow_zulu: bool,
+ offsets: [FixedOffset; 7],
+ expected: [&str; 7],
+ ) {
+ let offset_format = UtcOffsetFormat { precision, colons, allow_zulu, padding };
+ for (offset, expected) in offsets.iter().zip(expected.iter()) {
+ let mut output = String::new();
+ offset_format.format(&mut output, *offset).unwrap();
+ assert_eq!(&output, expected);
+ }
+ }
+ // +03:45, -03:30, +11:00, -11:00:22, +02:34:26, -12:34:30, +00:00
+ let offsets = [
+ FixedOffset::east_opt(13_500).unwrap(),
+ FixedOffset::east_opt(-12_600).unwrap(),
+ FixedOffset::east_opt(39_600).unwrap(),
+ FixedOffset::east_opt(-39_622).unwrap(),
+ FixedOffset::east_opt(9266).unwrap(),
+ FixedOffset::east_opt(-45270).unwrap(),
+ FixedOffset::east_opt(0).unwrap(),
+ ];
+ check(precision, Colon::Colon, Pad::Zero, false, offsets, expected[0]);
+ check(precision, Colon::Colon, Pad::Zero, true, offsets, expected[1]);
+ check(precision, Colon::Colon, Pad::Space, false, offsets, expected[2]);
+ check(precision, Colon::Colon, Pad::Space, true, offsets, expected[3]);
+ check(precision, Colon::Colon, Pad::None, false, offsets, expected[4]);
+ check(precision, Colon::Colon, Pad::None, true, offsets, expected[5]);
+ check(precision, Colon::None, Pad::Zero, false, offsets, expected[6]);
+ check(precision, Colon::None, Pad::Zero, true, offsets, expected[7]);
+ check(precision, Colon::None, Pad::Space, false, offsets, expected[8]);
+ check(precision, Colon::None, Pad::Space, true, offsets, expected[9]);
+ check(precision, Colon::None, Pad::None, false, offsets, expected[10]);
+ check(precision, Colon::None, Pad::None, true, offsets, expected[11]);
+ // `Colon::Maybe` should format the same as `Colon::None`
+ check(precision, Colon::Maybe, Pad::Zero, false, offsets, expected[6]);
+ check(precision, Colon::Maybe, Pad::Zero, true, offsets, expected[7]);
+ check(precision, Colon::Maybe, Pad::Space, false, offsets, expected[8]);
+ check(precision, Colon::Maybe, Pad::Space, true, offsets, expected[9]);
+ check(precision, Colon::Maybe, Pad::None, false, offsets, expected[10]);
+ check(precision, Colon::Maybe, Pad::None, true, offsets, expected[11]);
+ }
+ check_all(
+ OffsetPrecision::Hours,
+ [
+ ["+03", "-03", "+11", "-11", "+02", "-12", "+00"],
+ ["+03", "-03", "+11", "-11", "+02", "-12", "Z"],
+ [" +3", " -3", "+11", "-11", " +2", "-12", " +0"],
+ [" +3", " -3", "+11", "-11", " +2", "-12", "Z"],
+ ["+3", "-3", "+11", "-11", "+2", "-12", "+0"],
+ ["+3", "-3", "+11", "-11", "+2", "-12", "Z"],
+ ["+03", "-03", "+11", "-11", "+02", "-12", "+00"],
+ ["+03", "-03", "+11", "-11", "+02", "-12", "Z"],
+ [" +3", " -3", "+11", "-11", " +2", "-12", " +0"],
+ [" +3", " -3", "+11", "-11", " +2", "-12", "Z"],
+ ["+3", "-3", "+11", "-11", "+2", "-12", "+0"],
+ ["+3", "-3", "+11", "-11", "+2", "-12", "Z"],
+ ],
+ );
+ check_all(
+ OffsetPrecision::Minutes,
+ [
+ ["+03:45", "-03:30", "+11:00", "-11:00", "+02:34", "-12:35", "+00:00"],
+ ["+03:45", "-03:30", "+11:00", "-11:00", "+02:34", "-12:35", "Z"],
+ [" +3:45", " -3:30", "+11:00", "-11:00", " +2:34", "-12:35", " +0:00"],
+ [" +3:45", " -3:30", "+11:00", "-11:00", " +2:34", "-12:35", "Z"],
+ ["+3:45", "-3:30", "+11:00", "-11:00", "+2:34", "-12:35", "+0:00"],
+ ["+3:45", "-3:30", "+11:00", "-11:00", "+2:34", "-12:35", "Z"],
+ ["+0345", "-0330", "+1100", "-1100", "+0234", "-1235", "+0000"],
+ ["+0345", "-0330", "+1100", "-1100", "+0234", "-1235", "Z"],
+ [" +345", " -330", "+1100", "-1100", " +234", "-1235", " +000"],
+ [" +345", " -330", "+1100", "-1100", " +234", "-1235", "Z"],
+ ["+345", "-330", "+1100", "-1100", "+234", "-1235", "+000"],
+ ["+345", "-330", "+1100", "-1100", "+234", "-1235", "Z"],
+ ],
+ );
+ #[rustfmt::skip]
+ check_all(
+ OffsetPrecision::Seconds,
+ [
+ ["+03:45:00", "-03:30:00", "+11:00:00", "-11:00:22", "+02:34:26", "-12:34:30", "+00:00:00"],
+ ["+03:45:00", "-03:30:00", "+11:00:00", "-11:00:22", "+02:34:26", "-12:34:30", "Z"],
+ [" +3:45:00", " -3:30:00", "+11:00:00", "-11:00:22", " +2:34:26", "-12:34:30", " +0:00:00"],
+ [" +3:45:00", " -3:30:00", "+11:00:00", "-11:00:22", " +2:34:26", "-12:34:30", "Z"],
+ ["+3:45:00", "-3:30:00", "+11:00:00", "-11:00:22", "+2:34:26", "-12:34:30", "+0:00:00"],
+ ["+3:45:00", "-3:30:00", "+11:00:00", "-11:00:22", "+2:34:26", "-12:34:30", "Z"],
+ ["+034500", "-033000", "+110000", "-110022", "+023426", "-123430", "+000000"],
+ ["+034500", "-033000", "+110000", "-110022", "+023426", "-123430", "Z"],
+ [" +34500", " -33000", "+110000", "-110022", " +23426", "-123430", " +00000"],
+ [" +34500", " -33000", "+110000", "-110022", " +23426", "-123430", "Z"],
+ ["+34500", "-33000", "+110000", "-110022", "+23426", "-123430", "+00000"],
+ ["+34500", "-33000", "+110000", "-110022", "+23426", "-123430", "Z"],
+ ],
+ );
+ check_all(
+ OffsetPrecision::OptionalMinutes,
+ [
+ ["+03:45", "-03:30", "+11", "-11", "+02:34", "-12:35", "+00"],
+ ["+03:45", "-03:30", "+11", "-11", "+02:34", "-12:35", "Z"],
+ [" +3:45", " -3:30", "+11", "-11", " +2:34", "-12:35", " +0"],
+ [" +3:45", " -3:30", "+11", "-11", " +2:34", "-12:35", "Z"],
+ ["+3:45", "-3:30", "+11", "-11", "+2:34", "-12:35", "+0"],
+ ["+3:45", "-3:30", "+11", "-11", "+2:34", "-12:35", "Z"],
+ ["+0345", "-0330", "+11", "-11", "+0234", "-1235", "+00"],
+ ["+0345", "-0330", "+11", "-11", "+0234", "-1235", "Z"],
+ [" +345", " -330", "+11", "-11", " +234", "-1235", " +0"],
+ [" +345", " -330", "+11", "-11", " +234", "-1235", "Z"],
+ ["+345", "-330", "+11", "-11", "+234", "-1235", "+0"],
+ ["+345", "-330", "+11", "-11", "+234", "-1235", "Z"],
+ ],
+ );
+ check_all(
+ OffsetPrecision::OptionalSeconds,
+ [
+ ["+03:45", "-03:30", "+11:00", "-11:00:22", "+02:34:26", "-12:34:30", "+00:00"],
+ ["+03:45", "-03:30", "+11:00", "-11:00:22", "+02:34:26", "-12:34:30", "Z"],
+ [" +3:45", " -3:30", "+11:00", "-11:00:22", " +2:34:26", "-12:34:30", " +0:00"],
+ [" +3:45", " -3:30", "+11:00", "-11:00:22", " +2:34:26", "-12:34:30", "Z"],
+ ["+3:45", "-3:30", "+11:00", "-11:00:22", "+2:34:26", "-12:34:30", "+0:00"],
+ ["+3:45", "-3:30", "+11:00", "-11:00:22", "+2:34:26", "-12:34:30", "Z"],
+ ["+0345", "-0330", "+1100", "-110022", "+023426", "-123430", "+0000"],
+ ["+0345", "-0330", "+1100", "-110022", "+023426", "-123430", "Z"],
+ [" +345", " -330", "+1100", "-110022", " +23426", "-123430", " +000"],
+ [" +345", " -330", "+1100", "-110022", " +23426", "-123430", "Z"],
+ ["+345", "-330", "+1100", "-110022", "+23426", "-123430", "+000"],
+ ["+345", "-330", "+1100", "-110022", "+23426", "-123430", "Z"],
+ ],
+ );
+ check_all(
+ OffsetPrecision::OptionalMinutesAndSeconds,
+ [
+ ["+03:45", "-03:30", "+11", "-11:00:22", "+02:34:26", "-12:34:30", "+00"],
+ ["+03:45", "-03:30", "+11", "-11:00:22", "+02:34:26", "-12:34:30", "Z"],
+ [" +3:45", " -3:30", "+11", "-11:00:22", " +2:34:26", "-12:34:30", " +0"],
+ [" +3:45", " -3:30", "+11", "-11:00:22", " +2:34:26", "-12:34:30", "Z"],
+ ["+3:45", "-3:30", "+11", "-11:00:22", "+2:34:26", "-12:34:30", "+0"],
+ ["+3:45", "-3:30", "+11", "-11:00:22", "+2:34:26", "-12:34:30", "Z"],
+ ["+0345", "-0330", "+11", "-110022", "+023426", "-123430", "+00"],
+ ["+0345", "-0330", "+11", "-110022", "+023426", "-123430", "Z"],
+ [" +345", " -330", "+11", "-110022", " +23426", "-123430", " +0"],
+ [" +345", " -330", "+11", "-110022", " +23426", "-123430", "Z"],
+ ["+345", "-330", "+11", "-110022", "+23426", "-123430", "+0"],
+ ["+345", "-330", "+11", "-110022", "+23426", "-123430", "Z"],
+ ],
+ );
+ }
+}