WIP code for document formatter (-v)

src/spectator/formatting/document_formatter.cr

@@ -0,0 +1,26 @@
+require "./formatter"
+require "./suite_summary"
+
+module Spectator::Formatting
+  # Produces an indented document-style output.
+  # Each nested group of examples increases the indent.
+  # Example names are output in a color based on their result.
+  class DocumentFormatter < Formatter
+    include SuiteSummary
+
+    # Creates the formatter.
+    # By default, output is sent to STDOUT.
+    def initialize(@io : IO = STDOUT)
+    end
+
+    # Does nothing when an example is started.
+    def start_example(example)
+      # TODO: Display group names.
+    end
+
+    # Produces a single character output based on a result.
+    def end_example(result)
+      @io.puts result.call(Color) { result.example.what }
+    end
+  end
+end