Migrate PATH zombie test to Cucumber.

test/check_for_path_zombies.fish

@@ -1,9 +0,0 @@
-switch "$PATH"
-case "*sdkman/candidates/crash/*"
-    echo "Uninstalled candidate in PATH"
-    sdk list crash | head -10
-    echo $PATH
-    exit 1
-case "*"
-    echo "OKAY"
-end

test/features/corner_cases.feature

@@ -11,3 +11,8 @@ Feature: Corner Cases
         Then  environment variable SDKMAN_DIR has the original value
 
     # TODO: add test that fails if `test` in conf.d/sdk.fish:80 errors (cf issue #28 et al.)
+
+    Scenario: PATH should contain only valid paths
+        Given candidate crash is installed
+        When  candidate crash is uninstalled
+        Then  environment variable PATH cannot contain "sdkman/candidates/crash/"

test/features/step_definitions/corner_cases.rb

@@ -43,3 +43,8 @@ Then('environment variable {env_name} has the original value') do |name|
 
   expect(@response[:stdout][-1]).to eq(@response[:stdout][0]) # reinitialization effective
 end
+
+Then('environment variable {env_name} cannot contain {string}') do |name, value|
+  env = run_fish_command('echo noop')[:env]
+  expect(env[name]).to_not match(/#{Regexp.escape(value)}/)
+end

test/features/step_definitions/setup.rb

@@ -14,6 +14,22 @@ Given(/^candidate (\w+) is installed$/) do |candidate|
   run_bash_command("sdk install #{candidate}") unless installed?(candidate)
 end
 
+def _uninstall_candidate_version(candidate_dir)
+  %r{/([^/]+)/([^/]+)$}.match(candidate_dir) do |match|
+    candidate = match[1]
+    version = match[2]
+    run_bash_command("sdk rm #{candidate} #{version}") unless version == 'current'
+  end
+end
+
+When(/^candidate (\w+) is uninstalled$/) do |candidate|
+  puts `ls ~/.sdkman/candidates/#{candidate}`
+  Dir["#{ENV['HOME']}/.sdkman/candidates/#{candidate}/*"].each do |candidate_dir|
+    _uninstall_candidate_version(candidate_dir)
+  end
+  puts `ls ~/.sdkman/candidates/#{candidate}`
+end
+
 # Uninstall all SDKMAN! candidates
 # TODO: Run after every scenario, this makes tests very slow.
 #       Currently, Cucumber doesn't have Feature-level hooks, so we have to work around:
@@ -22,10 +38,6 @@ end
 #       --> clean up after _all_ features at least
 at_exit do
   Dir["#{ENV['HOME']}/.sdkman/candidates/*/*"].each do |candidate_dir|
-    %r{/([^/]+)/([^/]+)$}.match(candidate_dir) do |match|
-      candidate = match[1]
-      version = match[2]
-      run_bash_command("sdk rm #{candidate} #{version}") unless version == 'current'
-    end
+    _uninstall_candidate_version(candidate_dir)
   end
 end