Replace stub value method with call method

Pass method call information to stub.

spec/spectator/mocks/value_stub_spec.cr

@@ -1,6 +1,7 @@
 require "../../spec_helper"
 
 Spectator.describe Spectator::ValueStub do
+  let(method_call) { Spectator::MethodCall.capture(:foo) }
   subject(stub) { Spectator::ValueStub.new(:foo, 42) }
 
   it "stores the method name" do
@@ -8,7 +9,7 @@ Spectator.describe Spectator::ValueStub do
   end
 
   it "stores the return value" do
-    expect(stub.value).to eq(42)
+    expect(stub.call(method_call)).to eq(42)
   end
 
   describe "#===" do

src/spectator/mocks/lazy_double.cr

@@ -57,13 +57,13 @@ module Spectator
           _spectator_cast_stub_value(%stub, %call, \{{Messages[{{call.name.symbolize}}.id]}}, \{{Messages[{{call.name.symbolize}}.id].resolve >= Nil}})
         \{% else %}
           # A method that was not defined during initialization was stubbed.
-          # Even though all stubs will have a #value method, the compiler doesn't seem to agree.
+          # Even though all stubs will have a #call method, the compiler doesn't seem to agree.
           # Assert that it will (this should never fail).
-          raise TypeCastError.new("Stub has no value") unless %stub.responds_to?(:value)
+          raise TypeCastError.new("Stub has no value") unless %stub.responds_to?(:call)
 
           # Return the value of the stub as-is.
           # Might want to give a warning here, as this may produce a "bloated" union of all known stub types.
-          %stub.value
+          %stub.call(%call)
         \{% end %}
       else
         # A stub wasn't found, invoke the fallback logic.

src/spectator/mocks/null_double.cr

@@ -60,13 +60,13 @@ module Spectator
       # Attempt to find a stub that satisfies the method call and arguments.
       if %stub = _spectator_find_stub(%call)
         # A method that was not defined during initialization was stubbed.
-        # Even though all stubs will have a #value method, the compiler doesn't seem to agree.
+        # Even though all stubs will have a #call method, the compiler doesn't seem to agree.
         # Assert that it will (this should never fail).
-        raise TypeCastError.new("Stub has no value") unless %stub.responds_to?(:value)
+        raise TypeCastError.new("Stub has no value") unless %stub.responds_to?(:call)
 
         # Return the value of the stub as-is.
         # Might want to give a warning here, as this may produce a "bloated" union of all known stub types.
-        %stub.value
+        %stub.call(%call)
       else
         # A stub wasn't found, invoke the fallback logic.
         # Message received for a methods that isn't stubbed nor defined when initialized.

src/spectator/mocks/null_stub.cr

@@ -4,8 +4,8 @@ require "./value_stub"
 module Spectator
   # Stub that does nothing and returns nil.
   class NullStub < TypedStub(Nil)
-    def value : Nil
-      nil
+    # Invokes the stubbed implementation.
+    def call(_call : MethodCall) : Nil
     end
 
     def and_return(value)

src/spectator/mocks/stubbable.cr

@@ -273,17 +273,17 @@ module Spectator
       # If successful, return the value of the stub.
       # This is a common usage where the return type is simple and matches the stub type exactly.
       if %typed = {{stub}}.as?(::Spectator::TypedStub({{type}}))
-        %typed.value
+        %typed.call({{call}})
       else
         # The stub couldn't be easily cast to match the return type.
 
-        # Even though all stubs will have a #value method, the compiler doesn't seem to agree.
+        # Even though all stubs will have a #call method, the compiler doesn't seem to agree.
         # Assert that it will (this should never fail).
-        raise TypeCastError.new("Stub has no value") unless {{stub}}.responds_to?(:value)
+        raise TypeCastError.new("Stub has no value") unless {{stub}}.responds_to?(:call)
 
         # Get the value as-is from the stub.
         # This will be compiled as a union of all known stubbed value types.
-        %value = {{stub}}.value
+        %value = {{stub}}.call({{call}})
 
         # Attempt to cast the value to the method's return type.
         # If successful, which it will be in most cases, return it.

src/spectator/mocks/typed_stub.cr

@@ -1,3 +1,4 @@
+require "./method_call"
 require "./stub"
 
 module Spectator
@@ -6,7 +7,7 @@ module Spectator
   # *T* is the type produced by the stub.
   # How the stub produces this value is up to subclasses.
   abstract class TypedStub(T) < Stub
-    # Return value.
-    abstract def value : T
+    # Invokes the stubbed implementation.
+    abstract def call(call : MethodCall) : T
   end
 end

src/spectator/mocks/value_stub.cr

@@ -4,8 +4,10 @@ require "./typed_stub"
 module Spectator
   # Stub that responds with a static value.
   class ValueStub(T) < TypedStub(T)
-    # Return value.
-    getter value : T
+    # Invokes the stubbed implementation.
+    def call(_call : MethodCall) : T
+      @value
+    end
 
     # Creates the stub.
     def initialize(method : Symbol, @value : T, constraint : AbstractArguments? = nil)