Support output of multiple failed expectations

src/spectator/formatting/components/fail_result_block.cr

@@ -7,14 +7,12 @@ require "./result_block"
 module Spectator::Formatting::Components
   # Displays information about a fail result.
   struct FailResultBlock < ResultBlock
-    @expectation : Expectation
     @longest_key : Int32
 
     # Creates the component.
-    def initialize(example : Example, index : Int32, result : FailResult, subindex = 0)
+    def initialize(example : Example, index : Int32, @expectation : Expectation, subindex = 0)
       super(example, index, subindex)
-      @expectation = result.expectations.find(&.failed?).not_nil!
+      @longest_key = expectation.values.max_of { |(key, _value)| key.to_s.size }
-      @longest_key = @expectation.values.max_of { |(key, _value)| key.to_s.size }
     end
 
     # Content displayed on the second line of the block after the label.

src/spectator/formatting/summary.cr

@@ -41,7 +41,14 @@ module Spectator::Formatting
         if result = example.result.as?(ErrorResult)
           io.puts Components::ErrorResultBlock.new(example, index, result)
         elsif result = example.result.as?(FailResult)
-          io.puts Components::FailResultBlock.new(example, index, result)
+          failed_expectations = result.expectations.select(&.failed?)
+          if failed_expectations.size == 1
+            io.puts Components::FailResultBlock.new(example, index, failed_expectations.first)
+          else
+            failed_expectations.each_with_index(1) do |expectation, subindex|
+              io.puts Components::FailResultBlock.new(example, index, expectation, subindex)
+            end
+          end
         end
       end
     end