test(tree): Group all cargo-tree tests

Author: epage

tests/testsuite/tree.rs renamed to tests/testsuite/cargo_tree/deps.rs

@@ -6,7 +6,7 @@ use cargo_test_support::registry::{Dependency, Package};
 use cargo_test_support::str;
 use cargo_test_support::{basic_manifest, git, project, rustc_host, Project};
 
-use super::features2::switch_to_resolver_2;
+use crate::features2::switch_to_resolver_2;
 
 fn make_simple_proj() -> Project {
     Package::new("c", "1.0.0").publish();

tests/testsuite/tree_graph_features.rs renamed to tests/testsuite/cargo_tree/features.rs

@@ -1 +1,3 @@
+mod deps;
+mod features;
 mod help;

tests/testsuite/cargo_tree/mod.rs

@@ -178,8 +178,6 @@ mod standard_lib;
 mod test;
 mod timings;
 mod tool_paths;
-mod tree;
-mod tree_graph_features;
 mod unit_graph;
 mod update;
 mod vendor;