Split out help command to separate file (#9392)

tests/commands/help.rb

@@ -0,0 +1,32 @@
+require 'minitest/autorun'
+require_relative '../../commands/help'
+
+class HelpCommandTest < Minitest::Test
+  def test_no_arguments
+    expected_output = <<~EOT
+      Usage: crew help <command>
+      Available commands: build, const, deps, download, files, help, install, list, postinstall, prop, reinstall, remove, search, sysinfo, update, upgrade, upload, whatprovides, license, version
+    EOT
+    assert_output expected_output, nil do
+      Command.help(nil, nil)
+    end
+  end
+
+  def test_const_command
+    expected_output = <<~EOT
+      Display constant(s).
+      Usage: crew const [<const1> <const2> ...]
+      If no constants are provided, all constants will be displayed.
+    EOT
+    assert_output expected_output, nil do
+      Command.help('const', nil)
+    end
+  end
+
+  def test_prop_command
+    expected_output = "Use the 'is_static' property for packages which do not require shared dependencies.\n"
+    assert_output expected_output, nil do
+      Command.help('prop', 'is_static')
+    end
+  end
+end