Use ExpectationFailed instead of AssertionFailed

src/spectator/assertion_failed.cr

@@ -1,15 +0,0 @@
-require "./source"
-
-module Spectator
-  # Exception that indicates an assertion failed.
-  # When raised within a test, the test should abort.
-  class AssertionFailed < Exception
-    # Location where the assertion failed and the exception raised.
-    getter source : Source
-
-    # Creates the exception.
-    def initialize(@source : Source, message : String? = nil, cause : Exception? = nil)
-      super(message, cause)
-    end
-  end
-end

src/spectator/dsl/expectations.cr

@@ -1,6 +1,6 @@
-require "../assertion_failed"
 require "../block"
 require "../expectation"
+require "../expectation_failed"
 require "../source"
 require "../value"
 
@@ -10,7 +10,7 @@ module Spectator::DSL
     # Immediately fail the current test.
     # A reason can be specified with *message*.
     def fail(message = "Example failed", *, _file = __FILE__, _line = __LINE__)
-      raise AssertionFailed.new(Source.new(_file, _line), message)
+      raise ExpectationFailed.new(Source.new(_file, _line), message)
     end
 
     # Starts an expectation.

src/spectator/expectation_failed.cr

@@ -0,0 +1,15 @@
+require "./expectation"
+
+module Spectator
+  # Exception that indicates an expectation from a test failed.
+  # When raised within a test, the test should abort.
+  class ExpectationFailed < Exception
+    # Expectation that failed.
+    getter expectation : Expectation
+
+    # Creates the exception.
+    def initialize(@expectation : Expectation, message : String? = nil, cause : Exception? = nil)
+      super(message, cause)
+    end
+  end
+end