Add docs

src/spectator/formatting/components/block.cr

@@ -1,16 +1,28 @@
 module Spectator::Formatting::Components
+  # Base type for handling indented output.
+  # Indents are tracked and automatically printed.
+  # Use `#indent` to increase the indent for the duration of a block.
+  # Use `#line` to produce a line with an indentation prefixing it.
   abstract struct Block
+    # Default indent amount.
     private INDENT = 2
 
+    # Creates the block.
+    # A default *indent* size can be specified.
     def initialize(*, @indent : Int32 = INDENT)
     end
 
+    # Increases the indent by the a specific *amount* for the duration of the block.
     private def indent(amount = INDENT)
       @indent += amount
       yield
       @indent -= amount
     end
 
+    # Produces a line of output with an indent before it.
+    # The contents of the line should be generated by a block provided to this method.
+    # Ensure that _only_ one line is produced by the block,
+    # otherwise the indent will be lost.
     private def line(io)
       @indent.times { io << ' ' }
       yield

src/spectator/formatting/components/comment.cr

@@ -1,16 +1,21 @@
 require "colorize"
 
 module Spectator::Formatting::Components
+  # Object that can be stringified pre-pended with a comment mark (#).
   struct Comment(T)
+    # Default color for a comment.
     private COLOR = :cyan
 
+    # Creates a comment with the specified content.
     def initialize(@content : T)
     end
 
+    # Creates a colored comment.
     def self.colorize(content)
       new(content).colorize(COLOR)
     end
 
+    # Writes the comment to the output.
     def to_s(io)
       io << '#'
       io << ' '

src/spectator/formatting/components/error_result_block.cr

@@ -4,41 +4,51 @@ require "../../error_result"
 require "./result_block"
 
 module Spectator::Formatting::Components
+  # Displays information about an error result.
   struct ErrorResultBlock < ResultBlock
+    # Creates the component.
     def initialize(index : Int32, example : Example, @result : ErrorResult)
       super(index, example)
     end
 
+    # Content displayed on the second line of the block after the label.
     private def subtitle
       @result.error.message.try(&.each_line.first)
     end
 
+    # Prefix for the second line of the block.
     private def subtitle_label
       "Error: ".colorize(:red)
     end
 
+    # Display error information.
     private def content(io)
+      # Fetch the error and message.
+      # If there's no message
       error = @result.error
       lines = error.message.try(&.lines) || {"<blank>".colorize(:purple)}
 
+      # Display the error type and first line of the message.
       line(io) do
         io << "#{error.class}: ".colorize(:red)
         io << lines.first
       end
 
+      # Display additional lines after the first if there's any.
       lines.skip(1).each do |entry|
-        line(io) do
+        line(io) { io << entry }
-          io << entry
-        end
       end
 
-      error.backtrace?.try do |backtrace|
+      # Display the backtrace if it's available.
+      if backtrace = error.backtrace?
         indent { write_backtrace(io, backtrace) }
       end
     end
 
+    # Writes the backtrace entries to the output.
     private def write_backtrace(io, backtrace)
       backtrace.each do |entry|
+        # Dim entries that are outside the shard.
         entry = entry.colorize.dim unless entry.starts_with?(/(src|spec)\//)
         line(io) { io << entry }
       end

src/spectator/formatting/components/example_command.cr

@@ -1,10 +1,14 @@
+require "../../example"
 require "./comment"
 
 module Spectator::Formatting::Components
+  # Provides syntax for running a specific example from the command-line.
   struct ExampleCommand
+    # Creates the component with the specified example.
     def initialize(@example : Example)
     end
 
+    # Produces output for running the previously specified example.
     def to_s(io)
       io << "crystal spec "
       io << @example.location

src/spectator/formatting/components/fail_result_block.cr

@@ -4,19 +4,24 @@ require "../../fail_result"
 require "./result_block"
 
 module Spectator::Formatting::Components
+  # Displays information about a fail result.
   struct FailResultBlock < ResultBlock
+    # Creates the component.
     def initialize(index : Int32, example : Example, @result : FailResult)
       super(index, example)
     end
 
+    # Content displayed on the second line of the block after the label.
     private def subtitle
       @result.error.message.try(&.each_line.first)
     end
 
+    # Prefix for the second line of the block.
     private def subtitle_label
       "Failure: ".colorize(:red)
     end
 
+    # Display expectation match data.
     private def content(io)
       # TODO: Display match data.
     end

src/spectator/formatting/components/failure_command_list.cr

@@ -1,10 +1,15 @@
+require "../../example"
 require "./example_command"
 
 module Spectator::Formatting::Components
+  # Produces a list of commands to run failed examples.
   struct FailureCommandList
+    # Creates the component.
+    # Requires a set of *failures* to display commands for.
     def initialize(@failures : Enumerable(Example))
     end
 
+    # Produces the list of commands to run failed examples.
     def to_s(io)
       io.puts "Failed examples:"
       io.puts

src/spectator/formatting/components/pending_result_block.cr

@@ -1,22 +1,28 @@
+require "colorize"
 require "../../example"
 require "../../pending_result"
 require "./result_block"
 
 module Spectator::Formatting::Components
+  # Displays information about a pending result.
   struct PendingResultBlock < ResultBlock
+    # Creates the component.
     def initialize(index : Int32, example : Example, @result : PendingResult)
       super(index, example)
     end
 
+    # Content displayed on the second line of the block after the label.
     private def subtitle
       "No reason given" # TODO: Get reason from result.
     end
 
+    # Prefix for the second line of the block.
     private def subtitle_label
       # TODO: Could be pending or skipped.
       "Pending: ".colorize(:yellow)
     end
 
+    # No content for this type of block.
     private def content(io)
     end
   end

src/spectator/formatting/components/profile.cr

@@ -2,10 +2,13 @@ require "../../profile"
 require "./runtime"
 
 module Spectator::Formatting::Components
+  # Displays profiling information for slow examples.
   struct Profile
+    # Creates the component with the specified *profile*.
     def initialize(@profile : Spectator::Profile)
     end
 
+    # Produces the output containing the profiling information.
     def to_s(io)
       io << "Top "
       io << @profile.size
@@ -20,6 +23,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Writes a single example's timing to the output.
     private def example_profile(io, example)
       io << "  "
       io.puts example

src/spectator/formatting/components/result_block.cr

@@ -3,21 +3,47 @@ require "./block"
 require "./comment"
 
 module Spectator::Formatting::Components
+  # Base class that displayed indexed results in block form.
+  # These typically take the form:
+  # ```text
+  # 1) Title
+  #    Label: Subtitle
+  #
+  #    Content
+  #    # Source
+  # ```
   abstract struct ResultBlock < Block
+    # Creates the block with the specified *index* and for the given *example*.
     def initialize(@index : Int32, @example : Example)
       super()
     end
 
+    # Content displayed on the first line of the block.
+    # Will be stringified.
+    # By default, uses the example name.
+    # Can be overridden to use a different value.
     private def title
       @example
     end
 
+    # Content displayed on the second line of the block after the label.
+    # Will be stringified.
     private abstract def subtitle
 
+    # Prefix for the second line of the block.
+    # Will be stringified.
+    # This is typically something like "Error:" or "Failure:"
     private abstract def subtitle_label
 
+    # Produces the main content of the block.
+    # *io* is the stream to write to.
+    # `#line` and `#indent` (from `Block`) should be used to maintain spacing.
+    private abstract def content(io)
+
+    # Writes the component's output to the specified stream.
     def to_s(io)
       title_line(io)
+      # Ident over to align with the spacing used by the index.
       indent(index_digit_count + 2) do
         subtitle_line(io)
         io.puts
@@ -26,6 +52,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Produces the title line.
     private def title_line(io)
       line(io) do
         io << @index
@@ -35,6 +62,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Produces the subtitle line.
     private def subtitle_line(io)
       line(io) do
         io << subtitle_label
@@ -42,6 +70,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Produces the (example) source line.
     private def source_line(io)
       source = if (result = @example.result).responds_to?(:source)
                  result.source
@@ -51,6 +80,7 @@ module Spectator::Formatting::Components
       line(io) { io << Comment.colorize(source) }
     end
 
+    # Computes the number of spaces the index takes
     private def index_digit_count
       (Math.log(@index.to_f + 1) / Math::LOG10).ceil.to_i
     end

src/spectator/formatting/components/stats.cr

@@ -1,13 +1,16 @@
 require "colorize"
+require "../../report"
 require "./runtime"
 require "./totals"
 
 module Spectator::Formatting::Components
   # Statistics information displayed at the end of a run.
   struct Stats
+    # Creates the component with stats from *report*.
     def initialize(@report : Report)
     end
 
+    # Displays the stats.
     def to_s(io)
       runtime(io)
       totals(io)
@@ -16,15 +19,18 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Displays the time it took to run the suite.
     private def runtime(io)
       io << "Finished in "
       io.puts Runtime.new(@report.runtime)
     end
 
+    # Displays the counts for each type of result.
     private def totals(io)
       io.puts Totals.colorize(@report.counts)
     end
 
+    # Displays the random seed.
     private def random(io, seed)
       io.puts "Randomized with seed: #{seed}".colorize(:cyan)
     end

src/spectator/formatting/components/tap_profile.cr

@@ -2,10 +2,14 @@ require "../../profile"
 require "./runtime"
 
 module Spectator::Formatting::Components
+  # Displays profiling information for slow examples in a TAP format.
+  # Produces output similar to `Profile`, but formatted for TAP.
   struct TAPProfile
+    # Creates the component with the specified *profile*.
     def initialize(@profile : Spectator::Profile)
     end
 
+    # Produces the output containing the profiling information.
     def to_s(io)
       io << "# Top "
       io << @profile.size
@@ -20,6 +24,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Writes a single example's timing to the output.
     private def example_profile(io, example)
       io << "#   "
       io.puts example

src/spectator/formatting/components/totals.cr

@@ -1,10 +1,13 @@
 require "colorize"
 
 module Spectator::Formatting::Components
+  # Displays counts for each type of example result (pass, fail, error, pending).
   struct Totals
+    # Creates the component with the specified counts.
     def initialize(@examples : Int32, @failures : Int32, @errors : Int32, @pending : Int32)
     end
 
+    # Creates the component by pulling numbers from *counts*.
     def initialize(counts)
       @examples = counts.run
       @failures = counts.fail
@@ -12,6 +15,10 @@ module Spectator::Formatting::Components
       @pending = counts.pending
     end
 
+    # Creates the component, but colors it whether there were pending or failed results.
+    # The component will be red if there were failures (or errors),
+    # yellow if there were pending/skipped tests,
+    # and green if everything passed.
     def self.colorize(counts)
       totals = new(counts)
       if counts.fail > 0
@@ -23,6 +30,7 @@ module Spectator::Formatting::Components
       end
     end
 
+    # Writes the counts to the output.
     def to_s(io)
       io << @examples
       io << " examples, "