Migrate reinitialization test to Cucumber.

test/features/corner_cases.feature

@@ -0,0 +1,13 @@
+Feature: Corner Cases
+
+    Scenario: SDKMAN_DIR unset
+        Given environment variable SDKMAN_DIR is not set
+        When  a new Fish shell is launched
+        Then  environment variable SDKMAN_DIR has the original value
+
+    Scenario: SDKMAN_DIR set to a location the current user can't write at
+        Given environment variable SDKMAN_DIR is set to "/"
+        When  a new Fish shell is launched
+        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.)

test/features/step_definitions/corner_cases.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+Given('environment variable {env_name} is not set') do |name|
+  @name = name
+  @expect_intermediate_value = false
+  @command = <<~BASH
+    ( \\
+      env | grep -E "^#{name}="; \\
+      export -n #{name}; \\
+      env | grep -E "^#{name}="; \\
+  BASH
+end
+
+Given('environment variable {env_name} is set to {string}') do |name, new_value|
+  @name = name
+  @expect_intermediate_value = true
+  @command = <<~BASH
+    ( \\
+      env | grep -E "^#{name}="; \\
+      export #{name}=#{new_value}; \\
+      env | grep -E "^#{name}="; \\
+  BASH
+end
+
+When('a new Fish shell is launched') do
+  @command += <<~BASH
+      fish -lc "env | grep -E \\"^#{@name}=\\"" \\
+    ) \\
+  BASH
+
+  @response = run_bash_command(@command)
+end
+
+Then('environment variable {env_name} has the original value') do |name|
+  expect(name).to eq(@name) # otherwise the test doesn't make sense
+
+  if @expect_intermediate_value
+    expect(@response[:stdout].count).to eq(3)
+    expect(@response[:stdout][0]).to_not eq(@response[:stdout][1]) # destruction effective
+  else
+    expect(@response[:stdout].count).to eq(2)
+  end
+
+  expect(@response[:stdout][-1]).to eq(@response[:stdout][0]) # reinitialization effective
+end

test/features/support/helpers.rb

@@ -48,7 +48,7 @@ def run_bash_command(cmd)
       status: File.read(files[:status]).to_i,
       stdout: File.readlines(files[:stdout]),
       stderr: File.readlines(files[:stderr]),
-      env: File.readlines(files[:env])
+      env: File.readlines(files[:env]).map { |l| l.strip.split('=', 2) }.to_h
     }
   end
 end
@@ -83,7 +83,7 @@ def run_fish_command(cmd)
       status: File.read(files[:status]).to_i,
       stdout: File.readlines(files[:stdout]),
       stderr: File.readlines(files[:stderr]),
-      env: File.readlines(files[:env])
+      env: File.readlines(files[:env]).map { |l| l.strip.split('=', 2) }.to_h
     }
   end
 end

test/features/support/parameter_types.rb

@@ -20,6 +20,13 @@ ParameterType(
                end
 )
 
+ParameterType(
+  name: 'env_name',
+  regexp: /[A-Z_]+/,
+  type: String,
+  transformer: ->(s) { s }
+)
+
 ParameterType(
   name: 'env_glob',
   regexp: /[A-Z_*]+/,

test/reinitialize.fish

@@ -1,27 +0,0 @@
-# If either of
-#   - $SDKMAN_DIR is unset
-#   - $SDKMAN_DIR points to a directory not owned by the current user
-# is true, sdkman-for-fish should run sdkman's init script.
-
-# Assumes sdkman-for-fish is installed
-set proper_value "$SDKMAN_DIR"
-
-begin
-    set -e SDKMAN_DIR
-    set in_new_shell (fish -lc 'echo $SDKMAN_DIR')
-    if [ "$in_new_shell" != "$proper_value" ]
-      echo "SDKMAN_DIR initialized to $in_new_shell instead of $proper_value"
-      exit 1
-    end
-end
-
-begin
-    set -x SDKMAN_DIR "/" # belongs to root, who hopefully doesn't run this
-    set in_new_shell (fish -lc 'echo $SDKMAN_DIR')
-    if [ "$in_new_shell" != "$proper_value" ]
-      echo "SDKMAN_DIR reinitialized to $in_new_shell instead of $proper_value"
-      exit 1
-    end
-end
-
-# TODO: add test that fails if `test` in conf.d/sdk.fish:80 errors (cf issue #28 et al.)