test(impl): add all possible cases

spec/fixtures/impl/closer_input.go

@@ -0,0 +1,3 @@
+package main
+
+type CloserTest struct{}

spec/fixtures/impl/closer_output.go

@@ -0,0 +1,8 @@
+package main
+
+type CloserTest2 struct{}
+
+func (closertest *CloserTest2) Close() error {
+	panic("not implemented") // TODO: Implement
+}
+

spec/fixtures/impl/impl_input.go

@@ -1,3 +0,0 @@
-package main
-
-type Tester struct{}

spec/fixtures/impl/impl_output.go

@@ -1,8 +0,0 @@
-package main
-
-type Tester2 struct{}
-
-func (w *Tester2) Write(p []byte) (n int, err error) {
-	panic("not implemented") // TODO: Implement
-}
-

spec/fixtures/impl/reader_input.go

@@ -0,0 +1,3 @@
+package main
+
+type Read struct{}

spec/fixtures/impl/reader_output.go

@@ -0,0 +1,8 @@
+package main
+
+func (r Read2) Read(p []byte) (n int, err error) {
+	panic("not implemented") // TODO: Implement
+}
+
+
+type Read2 struct{}

spec/fixtures/impl/writer_input.go

@@ -0,0 +1,3 @@
+package main
+
+type WriterTest struct{}

spec/fixtures/impl/writer_output.go

@@ -0,0 +1,8 @@
+package main
+
+type WriterTest2 struct{}
+
+func (w *WriterTest2) Write(p []byte) (n int, err error) {
+	panic("not implemented") // TODO: Implement
+}
+