test(package): Ensure order is consistent

Author: epage

tests/testsuite/package.rs

@@ -4928,3 +4928,126 @@ path = "src/lib.rs"
         )],
     );
 }
+
+#[cargo_test]
+fn deterministic_build_targets() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+    [package]
+    name = "foo"
+    version = "0.0.1"
+    edition = "2021"
+    license = "MIT"
+    description = "foo"
+    documentation = "docs.rs/foo"
+    authors = []
+
+    [[example]]
+    name = "c"
+
+    [[example]]
+    name = "b"
+
+    [[example]]
+    name = "a"
+    "#,
+        )
+        .file("src/lib.rs", "")
+        .file("examples/z.rs", "fn main() {}")
+        .file("examples/y.rs", "fn main() {}")
+        .file("examples/x.rs", "fn main() {}")
+        .file("examples/c.rs", "fn main() {}")
+        .file("examples/b.rs", "fn main() {}")
+        .file("examples/a.rs", "fn main() {}")
+        .build();
+
+    p.cargo("package")
+        .with_stdout("")
+        .with_stderr(
+            "\
+[PACKAGING] foo v0.0.1 ([CWD])
+[VERIFYING] foo v0.0.1 ([CWD])
+[COMPILING] foo v0.0.1 ([CWD][..])
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [..]
+[PACKAGED] 10 files, [..] ([..] compressed)
+",
+        )
+        .run();
+
+    let f = File::open(&p.root().join("target/package/foo-0.0.1.crate")).unwrap();
+    validate_crate_contents(
+        f,
+        "foo-0.0.1.crate",
+        &[
+            "Cargo.lock",
+            "Cargo.toml",
+            "Cargo.toml.orig",
+            "src/lib.rs",
+            "examples/a.rs",
+            "examples/b.rs",
+            "examples/c.rs",
+            "examples/x.rs",
+            "examples/y.rs",
+            "examples/z.rs",
+        ],
+        &[(
+            "Cargo.toml",
+            r#"# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2021"
+name = "foo"
+version = "0.0.1"
+authors = []
+build = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = "foo"
+documentation = "docs.rs/foo"
+readme = false
+license = "MIT"
+
+[lib]
+name = "foo"
+path = "src/lib.rs"
+
+[[example]]
+name = "a"
+path = "examples/a.rs"
+
+[[example]]
+name = "b"
+path = "examples/b.rs"
+
+[[example]]
+name = "c"
+path = "examples/c.rs"
+
+[[example]]
+name = "x"
+path = "examples/x.rs"
+
+[[example]]
+name = "y"
+path = "examples/y.rs"
+
+[[example]]
+name = "z"
+path = "examples/z.rs"
+"#,
+        )],
+    );
+}