Add error block component

src/spectator/formatting/components/error_block.cr

@@ -0,0 +1,44 @@
+require "../../example"
+require "../../error_result"
+require "./comment"
+
+module Spectator::Formatting::Components
+  struct ErrorBlock
+    private INDENT = 2
+
+    def initialize(@example : Example, @result : ErrorResult, @index : Int32)
+    end
+
+    def to_s(io)
+      2.times { io << ' ' }
+      io << @index
+      io << ')'
+      io << ' '
+      io.puts @example
+      indent = INDENT + index_digit_count + 2
+      indent.times { io << ' ' }
+      error = @result.error
+      io << "Error: ".colorize(:red)
+      io.puts error.message
+      io.puts
+      indent.times { io << ' ' }
+      io << error.class
+      io.puts ':'
+      indent += INDENT
+      error.backtrace?.try do |trace|
+        trace.each do |entry|
+          indent.times { io << ' ' }
+          entry = entry.colorize.dim unless entry.starts_with?(/src\/|spec\//)
+          io.puts entry
+        end
+      end
+      indent -= INDENT
+      indent.times { io << ' ' }
+      io.puts Comment.colorize(@example.location) # TODO: Use location of failed expectation.
+    end
+
+    private def index_digit_count
+      (Math.log(@index.to_f + 1) / Math.log(10)).ceil.to_i
+    end
+  end
+end

src/spectator/formatting/components/failure_block.cr

@@ -1,12 +1,12 @@
 require "../../example"
+require "../../fail_result"
 require "./comment"
 
 module Spectator::Formatting::Components
   struct FailureBlock
     private INDENT = 2
 
-    def initialize(@example : Example, @index : Int32)
-      @result = @example.result.as(FailResult)
+    def initialize(@example : Example, @result : FailResult, @index : Int32)
     end
 
     def to_s(io)

src/spectator/formatting/summary.cr

@@ -1,3 +1,4 @@
+require "../fail_result"
 require "./components"
 
 module Spectator::Formatting
@@ -36,7 +37,11 @@ module Spectator::Formatting
       io.puts "Failures:"
       io.puts
       examples.each_with_index do |example, index|
-        io.puts Components::FailureBlock.new(example, index + 1)
+        if result = example.result.as?(ErrorResult)
+          io.puts Components::ErrorBlock.new(example, result, index + 1)
+        elsif result = example.result.as?(FailResult)
+          io.puts Components::FailureBlock.new(example, result, index + 1)
+        end
       end
     end