From dc0db358abe19481e475e10c32149b53370f1a1c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 30 May 2024 05:57:31 +0200
Subject: Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/cargo/tests/testsuite/lockfile_compat.rs | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)

(limited to 'src/tools/cargo/tests/testsuite/lockfile_compat.rs')

diff --git a/src/tools/cargo/tests/testsuite/lockfile_compat.rs b/src/tools/cargo/tests/testsuite/lockfile_compat.rs
index aad8723c3..63148cc07 100644
--- a/src/tools/cargo/tests/testsuite/lockfile_compat.rs
+++ b/src/tools/cargo/tests/testsuite/lockfile_compat.rs
@@ -888,3 +888,81 @@ perhaps a crate was updated and forgotten to be re-vendored?
         )
         .run();
 }
+
+#[cargo_test]
+fn v4_is_unstable() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &format!(
+                r#"
+                    [package]
+                    name = "foo"
+                    version = "0.0.1"
+                "#,
+            ),
+        )
+        .file("src/lib.rs", "")
+        .file("Cargo.lock", "version = 4")
+        .build();
+
+    p.cargo("fetch")
+        .with_status(101)
+        .with_stderr(
+            "\
+error: failed to parse lock file at: [CWD]/Cargo.lock
+
+Caused by:
+  lock file version `4` was found, but this version of Cargo does not \
+  understand this lock file, perhaps Cargo needs to be updated?
+",
+        )
+        .run();
+
+    // On nightly, let the user know about the `-Z` flag.
+    p.cargo("fetch")
+        .masquerade_as_nightly_cargo(&["-Znext-lockfile-bump"])
+        .with_status(101)
+        .with_stderr(
+            "\
+error: failed to parse lock file at: [CWD]/Cargo.lock
+
+Caused by:
+  lock file version 4 requires `-Znext-lockfile-bump`
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn v4_cannot_be_created_from_scratch() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &format!(
+                r#"
+                    [package]
+                    name = "foo"
+                    version = "0.0.1"
+                "#,
+            ),
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("fetch -Znext-lockfile-bump")
+        .masquerade_as_nightly_cargo(&["-Znext-lockfile-bump"])
+        .run();
+
+    let lockfile = r#"# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "foo"
+version = "0.0.1"
+"#;
+
+    let lock = p.read_lockfile();
+    assert_match_exact(lockfile, &lock);
+}
-- 
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