add tests for version commands

test/local.bats

@@ -19,6 +19,19 @@ setup() {
   assert_success "1.2.3"
 }
 
+@test "supports legacy .rbenv-version file" {
+  echo "1.2.3" > .rbenv-version
+  run rbenv-local
+  assert_success "1.2.3"
+}
+
+@test "local .ruby-version has precedence over .rbenv-version" {
+  echo "1.8" > .rbenv-version
+  echo "2.0" > .ruby-version
+  run rbenv-local
+  assert_success "2.0"
+}
+
 @test "ignores version in parent directory" {
   echo "1.2.3" > .ruby-version
   mkdir -p "subdir" && cd "subdir"
@@ -48,6 +61,43 @@ setup() {
   assert_success "1.0-pre"
   run rbenv-local 1.2.3
   assert_success ""
-  run rbenv-local
-  assert_success "1.2.3"
+  assert [ "$(cat .ruby-version)" = "1.2.3" ]
+}
+
+@test "renames .rbenv-version to .ruby-version" {
+  echo "1.8.7" > .rbenv-version
+  mkdir -p "${RBENV_ROOT}/versions/1.9.3"
+  run rbenv-local
+  assert_success "1.8.7"
+  run rbenv-local "1.9.3"
+  assert_success
+  assert_output <<OUT
+rbenv: removed existing \`.rbenv-version' file and migrated
+       local version specification to \`.ruby-version' file
+OUT
+  assert [ ! -e .rbenv-version ]
+  assert [ "$(cat .ruby-version)" = "1.9.3" ]
+}
+
+@test "doesn't rename .rbenv-version if changing the version failed" {
+  echo "1.8.7" > .rbenv-version
+  assert [ ! -e "${RBENV_ROOT}/versions/1.9.3" ]
+  run rbenv-local "1.9.3"
+  assert_failure "rbenv: version \`1.9.3' not installed"
+  assert [ ! -e .ruby-version ]
+  assert [ "$(cat .rbenv-version)" = "1.8.7" ]
+}
+
+@test "unsets local version" {
+  touch .ruby-version
+  run rbenv-local --unset
+  assert_success ""
+  assert [ ! -e .rbenv-version ]
+}
+
+@test "unsets alternate version file" {
+  touch .rbenv-version
+  run rbenv-local --unset
+  assert_success ""
+  assert [ ! -e .rbenv-version ]
 }