Capture expectations

spec/helpers/expectation.cr

@@ -0,0 +1,28 @@
+module Spectator::SpecHelpers
+  # Information about an `expect` call in an example.
+  struct Expectation
+    # Indicates whether the expectation passed or failed.
+    getter? satisfied : Bool
+
+    # Message when the expectation failed.
+    # Only available when `#satisfied?` is false.
+    getter! message : String
+
+    # Additional information about the expectation.
+    # Only available when `#satisfied?` is false.
+    getter! values : Hash(String, String)
+
+    # Creates the expectation outcome.
+    def initialize(@satisfied, @message, @values)
+    end
+
+    # Extracts the expectation information from a `JSON::Any` object.
+    def self.from_json_any(object : JSON::Any)
+      satisfied = object["satisfied"].as_bool
+      message = object["failure"]?.try(&.as_s?)
+      values = object["values"]?.try(&.as_h?)
+      values = values.transform_values(&.as_s) if values
+      new(satisfied, message, values)
+    end
+  end
+end

spec/helpers/result.cr

@@ -15,8 +15,11 @@ module Spectator::SpecHelpers
     # Status of the example after running.
     getter outcome : Outcome
 
+    # List of expectations ran in the example.
+    getter expectations : Array(Expectation)
+
     # Creates the result.
-    def initialize(@name, @outcome)
+    def initialize(@name, @outcome, @expectations)
     end
 
     # Checks if the example was successful.
@@ -43,16 +46,21 @@ module Spectator::SpecHelpers
     def self.from_json_any(object : JSON::Any)
       name = object["name"].as_s
       outcome = parse_outcome_string(object["result"].as_s)
-      new(name, outcome)
+      expectations = if (list = object["expectations"].as_a?)
+                       list.map { |e| Expectation.from_json_any(e) }
+                     else
+                       [] of Expectation
+                     end
+      new(name, outcome, expectations)
     end
 
     # Converts a result string, such as "fail" to an enum value.
     private def self.parse_outcome_string(string)
       case string
       when /success/i then Outcome::Success
-      when /fail/i then Outcome::Failure
-      when /error/i then Outcome::Error
-      else Outcome::Unknown
+      when /fail/i    then Outcome::Failure
+      when /error/i   then Outcome::Error
+      else                 Outcome::Unknown
       end
     end
   end

spec/runtime_example_spec.cr

@@ -20,6 +20,10 @@ Spectator.describe "Runtime compilation" do
     expect(passing_example).to be_successful
   end
 
+  it "can retrieve expectations" do
+    expect(passing_example.expectations).to_not be_empty
+  end
+
   given_example failing_example do
     it "does something" do
       expect(true).to be_false