test(vendor): Ensure order is consistent

tests/testsuite/vendor.rs

@@ -6,8 +6,10 @@
 
 use std::fs;
 
+use cargo_test_support::compare::assert_e2e;
 use cargo_test_support::git;
 use cargo_test_support::registry::{self, Package, RegistryBuilder};
+use cargo_test_support::str;
 use cargo_test_support::{basic_lib_manifest, basic_manifest, paths, project, Project};
 
 #[cargo_test]
@@ -862,6 +864,131 @@ fn git_complex() {
         .run();
 }
 
+#[cargo_test]
+fn git_deterministic() {
+    let git_dep = git::new("git_dep", |p| {
+        p.file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "git_dep"
+            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() {}")
+    });
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &format!(
+                r#"
+                    [package]
+                    name = "foo"
+                    version = "0.1.0"
+
+                    [dependencies]
+                    git_dep = {{ git = '{}' }}
+                "#,
+                git_dep.url()
+            ),
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    let output = p
+        .cargo("vendor --respect-source-config")
+        .exec_with_output()
+        .unwrap();
+    let output = String::from_utf8(output.stdout).unwrap();
+    p.change_file(".cargo/config.toml", &output);
+
+    let git_dep_manifest = p.read_file("vendor/git_dep/Cargo.toml");
+    assert_e2e().eq(
+        git_dep_manifest,
+        str![[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.
+
+bin = []
+test = []
+bench = []
+
+[package]
+edition = "2021"
+name = "git_dep"
+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 = "git_dep"
+path = [..]
+
+[[example]]
+name = "c"
+path = [..]
+
+[[example]]
+name = "b"
+path = [..]
+
+[[example]]
+name = "a"
+path = [..]
+
+[[example]]
+name = "z"
+path = [..]
+
+[[example]]
+name = "x"
+path = [..]
+
+[[example]]
+name = "y"
+path = [..]
+
+"##]],
+    );
+}
+
 #[cargo_test]
 fn depend_on_vendor_dir_not_deleted() {
     let p = project()