# HG changeset patch
# User Simon Sapin <simon.sapin@octobus.net>
# Date 2021-04-09 10:02:51
# Node ID 6d5a26e94d9ee9816f1b9a45b22f55ed1b2b7ab0
# Parent  37f49d46239448523e6dfbbe9bc07b71150b3317

unit-tests: Fix `cargo test` on 32-bit platforms

Fixes https://bz.mercurial-scm.org/show_bug.cgi?id=6506

This makes `IndexEntryBuilder::build`, which is only used in unit tests, use
`u32` or `u64` instead of platform-dependent `usize` when packing binary data
to be used at test input.

To run Rust unit tests in 32-bit mode in a x86-64 environment, use:

    rustup target add i686-unknown-linux-gnu  # Once
    (cd rust && cargo test --target i686-unknown-linux-gnu)

Differential Revision: https://phab.mercurial-scm.org/D10351

diff --git a/rust/hg-core/src/revlog/index.rs b/rust/hg-core/src/revlog/index.rs
--- a/rust/hg-core/src/revlog/index.rs
+++ b/rust/hg-core/src/revlog/index.rs
@@ -300,12 +300,12 @@ mod tests {
                 // Remaining offset bytes.
                 bytes.extend(&[0u8; 2]);
             } else {
-                // Offset is only 6 bytes will usize is 8.
-                bytes.extend(&self.offset.to_be_bytes()[2..]);
+                // Offset stored on 48 bits (6 bytes)
+                bytes.extend(&(self.offset as u64).to_be_bytes()[2..]);
             }
             bytes.extend(&[0u8; 2]); // Revision flags.
-            bytes.extend(&self.compressed_len.to_be_bytes()[4..]);
-            bytes.extend(&self.uncompressed_len.to_be_bytes()[4..]);
+            bytes.extend(&(self.compressed_len as u32).to_be_bytes());
+            bytes.extend(&(self.uncompressed_len as u32).to_be_bytes());
             bytes.extend(&self.base_revision.to_be_bytes());
             bytes
         }