Auto merge of #5119 - alexcrichton:no-clone-index-in-tests, r=matklad

Update a test to not clone the real index

A local index should work ok!

tests/testsuite/generate_lockfile.rs

@@ -2,6 +2,8 @@ use std::fs::{self, File};
 use std::io::prelude::*;
 
 use cargotest::support::{project, execs};
+use cargotest::support::registry::Package;
+use cargotest::ChannelChanger;
 use hamcrest::{assert_that, existing_file, is_not};
 
 #[test]
@@ -73,7 +75,8 @@ fn adding_and_removing_packages() {
 
 #[test]
 fn no_index_update() {
-    use cargotest::ChannelChanger;
+    Package::new("serde", "1.0.0").publish();
+
     let p = project("foo")
         .file("Cargo.toml", r#"
             [package]
@@ -88,12 +91,12 @@ fn no_index_update() {
         .build();
 
     assert_that(p.cargo("generate-lockfile"),
-                execs().with_stdout("")
-                    .with_stderr_contains("    Updating registry `https://github.com/rust-lang/crates.io-index`"));
+                execs().with_stderr("\
+[UPDATING] registry `[..]`
+"));
 
     assert_that(p.cargo("generate-lockfile").masquerade_as_nightly_cargo().arg("-Zno-index-update"),
-                execs().with_status(0).with_stdout("")
-                    .with_stderr_does_not_contain("    Updating registry `https://github.com/rust-lang/crates.io-index`"));
+                execs().with_status(0).with_stdout("").with_stderr(""));
 }
 
 #[test]