Initial spec for double DSL

spec/spectator/dsl/mocks/double_spec.cr

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+require "../../../spec_helper"
+
+Spectator.describe "Double DSL" do
+  context "specifying methods as keyword args" do
+    double(:test, foo: "foobar", bar: 42)
+    subject(dbl) { double(:test) }
+
+    it "defines a double with methods" do
+      aggregate_failures do
+        expect(dbl.foo).to eq("foobar")
+        expect(dbl.bar).to eq(42)
+      end
+    end
+
+    it "compiles types without unions" do
+      aggregate_failures do
+        expect(dbl.foo).to compile_as(String)
+        expect(dbl.bar).to compile_as(Int32)
+      end
+    end
+
+    context "with an unexpected message" do
+      it "raises an error" do
+        expect { dbl.baz }.to raise_error(Spectator::UnexpectedMessage, /baz/)
+      end
+
+      it "reports the double name" do
+        expect { dbl.baz }.to raise_error(Spectator::UnexpectedMessage, /:baz/)
+      end
+
+      it "reports the arguments" do
+        expect { dbl.baz(:xyz, 123, a: "XYZ") }.to raise_error(Spectator::UnexpectedMessage, /\(:xyz, 123, a: "XYZ"\)/)
+      end
+    end
+  end
+
+  # describe "#double with stubs in block" do
+  #   double(:test2) do
+  #     stub def foo
+  #       "foobar"
+  #     end
+
+  #     stub def bar
+  #       42
+  #     end
+  #   end
+
+  #   subject(dbl) { double(:test2) }
+
+  #   it "defines a double with methods" do
+  #     aggregate_failures do
+  #       expect(dbl.foo).to eq("foobar")
+  #       expect(dbl.bar).to eq(42)
+  #     end
+  #   end
+
+  #   it "compiles types without unions" do
+  #     aggregate_failures do
+  #       expect(dbl.foo).to compile_as(String)
+  #       expect(dbl.bar).to compile_as(Int32)
+  #     end
+  #   end
+  # end
+
+  describe "double naming" do
+    double(:Name, type: :symbol)
+
+    it "accepts a symbolic double name" do
+      dbl = double(:Name)
+      expect(dbl.type).to eq(:symbol)
+    end
+
+    it "accepts a string double name" do
+      dbl = double("Name")
+      expect(dbl.type).to eq(:symbol)
+    end
+
+    it "accepts a constant double name" do
+      dbl = double(Name)
+      expect(dbl.type).to eq(:symbol)
+    end
+  end
+
+  describe "scope" do
+    double(:outer, scope: :outer)
+    double(:scope, scope: :outer)
+
+    it "finds a double in the same scope" do
+      dbl = double(:outer)
+      expect(dbl.scope).to eq(:outer)
+    end
+
+    it "uses an identically named double from the same scope" do
+      dbl = double(:scope)
+      expect(dbl.scope).to eq(:outer)
+    end
+
+    context "inner1" do
+      double(:inner, scope: :inner1)
+      double(:scope, scope: :inner1)
+
+      it "finds a double in the same scope" do
+        dbl = double(:inner)
+        expect(dbl.scope).to eq(:inner1)
+      end
+
+      it "uses an identically named double from the same scope" do
+        dbl = double(:scope)
+        expect(dbl.scope).to eq(:inner1)
+      end
+
+      context "nested" do
+        it "finds a double from a parent scope" do
+          aggregate_failures do
+            dbl = double(:inner)
+            expect(dbl.scope).to eq(:inner1)
+            dbl = double(:outer)
+            expect(dbl.scope).to eq(:outer)
+          end
+        end
+
+        it "uses the inner-most identically named double" do
+          dbl = double(:inner)
+          expect(dbl.scope).to eq(:inner1)
+        end
+      end
+    end
+
+    context "inner2" do
+      double(:inner, scope: :inner2)
+      double(:scope, scope: :inner2)
+
+      it "finds a double in the same scope" do
+        dbl = double(:inner)
+        expect(dbl.scope).to eq(:inner2)
+      end
+
+      it "uses an identically named double from the same scope" do
+        dbl = double(:scope)
+        expect(dbl.scope).to eq(:inner2)
+      end
+
+      context "nested" do
+        it "finds a double from a parent scope" do
+          aggregate_failures do
+            dbl = double(:inner)
+            expect(dbl.scope).to eq(:inner2)
+            dbl = double(:outer)
+            expect(dbl.scope).to eq(:outer)
+          end
+        end
+
+        it "uses the inner-most identically named double" do
+          dbl = double(:inner)
+          expect(dbl.scope).to eq(:inner2)
+        end
+      end
+    end
+  end
+end