Add no_args

spec/spectator/dsl/mocks/stub_spec.cr

@@ -93,4 +93,14 @@ Spectator.describe "Stub DSL", :smoke do
       end
     end
   end
+
+  describe "#no_args" do
+    it "defines a stub with a no arguments constraint" do
+      allow(dbl).to receive(:foo).with(no_args).and_return(5)
+      aggregate_failures do
+        expect(dbl.foo).to eq(5)
+        expect(dbl.foo(0)).to eq(42)
+      end
+    end
+  end
 end

src/spectator/dsl/mocks.cr

@@ -432,5 +432,10 @@ module Spectator::DSL
         ::Spectator::NullStub.new({{method.id.symbolize}}, location: ::Spectator::Location.new({{_file}}, {{_line}}))
       {% end %}
     end
+
+    # Returns empty arguments.
+    def no_args
+      ::Spectator::Arguments.empty
+    end
   end
 end

src/spectator/mocks/exception_stub.cr

@@ -12,8 +12,7 @@ module Spectator
     end
 
     # Returns a new stub with constrained arguments.
-    def with(*args, **kwargs)
-      constraint = Arguments.new(args, kwargs)
+    def with(constraint : AbstractArguments)
       self.class.new(method, @exception, constraint, location)
     end
 

src/spectator/mocks/multi_value_stub.cr

@@ -16,8 +16,7 @@ module Spectator
     end
 
     # Returns a new stub with constrained arguments.
-    def with(*args, **kwargs)
-      constraint = Arguments.new(args, kwargs)
+    def with(constraint : AbstractArguments)
       self.class.new(method, @values, constraint, location)
     end
 

src/spectator/mocks/null_stub.cr

@@ -9,8 +9,7 @@ module Spectator
     end
 
     # Returns a new stub with constrained arguments.
-    def with(*args, **kwargs)
-      constraint = Arguments.new(args, kwargs)
+    def with(constraint : AbstractArguments)
       self.class.new(method, constraint, location)
     end
   end

src/spectator/mocks/proc_stub.cr

@@ -11,8 +11,7 @@ module Spectator
     end
 
     # Returns a new stub with constrained arguments.
-    def with(*args, **kwargs)
-      constraint = Arguments.new(args, kwargs)
+    def with(constraint : AbstractArguments)
       self.class.new(method, @proc, constraint, location)
     end
 

src/spectator/mocks/stub_modifiers.cr

@@ -1,7 +1,15 @@
+require "./arguments"
+
 module Spectator
   # Mixin intended for `Stub` to return new, modified stubs.
   module StubModifiers
     # Returns a new stub of the same type with constrained arguments.
-    abstract def with(*args, **kwargs)
+    abstract def with(constraint : AbstractArguments)
+
+    # :ditto:
+    def with(*args, **kwargs)
+      constraint = Arguments.new(args, kwargs)
+      self.with(constraint)
+    end
   end
 end

src/spectator/mocks/value_stub.cr

@@ -12,8 +12,7 @@ module Spectator
     end
 
     # Returns a new stub with constrained arguments.
-    def with(*args, **kwargs)
-      constraint = Arguments.new(args, kwargs)
+    def with(constraint : AbstractArguments)
       self.class.new(method, @value, constraint, location)
     end