Update migration tests to reflect v4 layout

Author: charlespierce

tests/acceptance/migrations.rs

@@ -30,7 +30,7 @@ fn empty_volta_home_is_created() {
     assert!(Sandbox::path_exists(".volta/tools/user"));
 
     // Layout file should now exist
-    assert!(Sandbox::path_exists(".volta/layout.v3"));
+    assert!(Sandbox::path_exists(".volta/layout.v4"));
 
     // shims should all be created
     // NOTE: this doesn't work in Windows, because the default shims are stored separately
@@ -58,6 +58,7 @@ fn legacy_v0_volta_home_is_upgraded() {
     // Layout file is not there
     assert!(!Sandbox::path_exists(".volta/layout.v1"));
     assert!(!Sandbox::path_exists(".volta/layout.v2"));
+    assert!(!Sandbox::path_exists(".volta/layout.v3"));
 
     // running volta should not create anything else
     assert_that!(s.volta("--version"), execs().with_status(0));
@@ -73,7 +74,8 @@ fn legacy_v0_volta_home_is_upgraded() {
     // Most recent layout file should exist, others should not
     assert!(!Sandbox::path_exists(".volta/layout.v1"));
     assert!(!Sandbox::path_exists(".volta/layout.v2"));
-    assert!(Sandbox::path_exists(".volta/layout.v3"));
+    assert!(!Sandbox::path_exists(".volta/layout.v3"));
+    assert!(Sandbox::path_exists(".volta/layout.v4"));
 
     // shims should all be created
     // NOTE: this doesn't work in Windows, because the default shims are stored separately
@@ -141,7 +143,8 @@ fn tagged_v1_volta_home_is_upgraded() {
     // Most recent layout file should exist, others should not
     assert!(!Sandbox::path_exists(".volta/layout.v1"));
     assert!(!Sandbox::path_exists(".volta/layout.v2"));
-    assert!(Sandbox::path_exists(".volta/layout.v3"));
+    assert!(!Sandbox::path_exists(".volta/layout.v3"));
+    assert!(Sandbox::path_exists(".volta/layout.v4"));
 
     // shims should all be created
     // NOTE: this doesn't work in Windows, because the default shims are stored separately
@@ -206,12 +209,12 @@ fn tagged_v1_to_v2_keeps_migrated_node_images() {
 }
 
 #[test]
-fn current_v3_volta_home_is_unchanged() {
-    let s = sandbox().layout_file("v3").build();
+fn current_v4_volta_home_is_unchanged() {
+    let s = sandbox().layout_file("v4").build();
 
     // directories that are already created by the test framework
     assert!(Sandbox::path_exists(".volta"));
-    assert!(Sandbox::path_exists(".volta/layout.v3"));
+    assert!(Sandbox::path_exists(".volta/layout.v4"));
     assert!(Sandbox::path_exists(".volta/cache/node"));
     assert!(Sandbox::path_exists(".volta/tmp"));
     assert!(Sandbox::path_exists(".volta/tools/inventory/node"));
@@ -222,7 +225,7 @@ fn current_v3_volta_home_is_unchanged() {
 
     // everything should be the same as before running the command
     assert!(Sandbox::path_exists(".volta"));
-    assert!(Sandbox::path_exists(".volta/layout.v3"));
+    assert!(Sandbox::path_exists(".volta/layout.v4"));
     assert!(Sandbox::path_exists(".volta/cache/node"));
     assert!(Sandbox::path_exists(".volta/tmp"));
     assert!(Sandbox::path_exists(".volta/tools/inventory/node"));