od: hex byte offset case fix (#12175)

* Made hex byte offset lowercase

* Added test based on issue

* Fixed formatting, moved import to local scope

* Fixed failing tests

* Forced no wasi test

* Revert "Forced no wasi test"

This reverts commit 0cd71c6.

* Switched linux to unix, to match test_dd

* Removed urandom dependency credit @cakebaker

Author: max-amb

src/uu/od/src/input_offset.rs

@@ -51,8 +51,8 @@ impl InputOffset {
         match (self.radix, self.label) {
             (Radix::Decimal, None) => format!("{:07}", self.byte_pos),
             (Radix::Decimal, Some(l)) => format!("{:07} ({l:07})", self.byte_pos),
-            (Radix::Hexadecimal, None) => format!("{:06X}", self.byte_pos),
-            (Radix::Hexadecimal, Some(l)) => format!("{:06X} ({l:06X})", self.byte_pos),
+            (Radix::Hexadecimal, None) => format!("{:06x}", self.byte_pos),
+            (Radix::Hexadecimal, Some(l)) => format!("{:06x} ({l:06x})", self.byte_pos),
             (Radix::Octal, None) => format!("{:07o}", self.byte_pos),
             (Radix::Octal, Some(l)) => format!("{:07o} ({l:07o})", self.byte_pos),
             (Radix::NoPrefix, None) => String::new(),
@@ -73,7 +73,7 @@ impl InputOffset {
 #[test]
 fn test_input_offset() {
     let mut sut = InputOffset::new(Radix::Hexadecimal, 10, None);
-    assert_eq!("00000A", &sut.format_byte_offset());
+    assert_eq!("00000a", &sut.format_byte_offset());
     sut.increase_position(10);
     assert_eq!("000014", &sut.format_byte_offset());
 
@@ -98,16 +98,16 @@ fn test_input_offset() {
 #[test]
 fn test_input_offset_with_label() {
     let mut sut = InputOffset::new(Radix::Hexadecimal, 10, Some(20));
-    assert_eq!("00000A (000014)", &sut.format_byte_offset());
+    assert_eq!("00000a (000014)", &sut.format_byte_offset());
     sut.increase_position(10);
-    assert_eq!("000014 (00001E)", &sut.format_byte_offset());
+    assert_eq!("000014 (00001e)", &sut.format_byte_offset());
 
     // note normally the radix will not change after initialization
     sut.set_radix(Radix::Decimal);
     assert_eq!("0000020 (0000030)", &sut.format_byte_offset());
 
     sut.set_radix(Radix::Hexadecimal);
-    assert_eq!("000014 (00001E)", &sut.format_byte_offset());
+    assert_eq!("000014 (00001e)", &sut.format_byte_offset());
 
     sut.set_radix(Radix::Octal);
     assert_eq!("0000024 (0000036)", &sut.format_byte_offset());

tests/by-util/test_od.rs

@@ -689,7 +689,7 @@ fn test_hex_offset() {
                    00000000 00000000 00000000 00000000
             000010 00000000 00000000 00000000 00000000
                    00000000 00000000 00000000 00000000
-            00001F
+            00001f
             ",
     );
 
@@ -1343,3 +1343,20 @@ fn test_write_error_dev_full() {
         .code_is(1)
         .stderr_contains("No space left on device");
 }
+
+#[test]
+fn test_hex_lowercase() {
+    let input = [0u8; 10];
+    // Test verifies that the output hex byte offset is in lowercase
+    new_ucmd!()
+        .arg("-Ax")
+        .run_piped_stdin(input)
+        .success()
+        .no_stderr()
+        .stdout_only(unindent(
+            r"
+                000000 000000 000000 000000 000000 000000
+                00000a
+            ",
+        ));
+}