Add tests for code persistence

codegen/config/resolver.go

@@ -46,7 +46,7 @@ func (r *ResolverConfig) Check() error {
 		if r.Filename == "" {
 			r.Filename = filepath.Join(r.DirName, "resolver.go")
 		} else {
-			r.Filename = filepath.Join(r.DirName, r.Filename)
+			r.Filename = abs(r.Filename)
 		}
 	default:
 		return fmt.Errorf("invalid layout %s. must be %s or %s", r.Layout, LayoutSingleFile, LayoutFollowSchema)

internal/rewrite/rewriter.go

@@ -172,8 +172,6 @@ func (r *Rewriter) RemainingSource(filename string) string {
 				continue
 			}
 
-			fmt.Printf("%T\n", d)
-
 			buf.WriteString(r.getSource(d.Pos(), d.End()))
 			buf.WriteString("\n")
 		}

plugin/resolvergen/resolver_test.go

@@ -2,6 +2,7 @@ package resolvergen
 
 import (
 	"fmt"
+	"io/ioutil"
 	"syscall"
 	"testing"
 
@@ -41,6 +42,14 @@ func TestLayoutFollowSchema(t *testing.T) {
 
 	require.NoError(t, p.GenerateCode(data))
 	assertNoErrors(t, "github.com/99designs/gqlgen/plugin/resolvergen/testdata/followschema/out")
+
+	b, err := ioutil.ReadFile("testdata/followschema/out/schema_resolvers.go")
+	require.NoError(t, err)
+	source := string(b)
+
+	require.Contains(t, source, "// CustomerResolverType.Resolver implementation")
+	require.Contains(t, source, "// CustomerResolverType.Name implementation")
+	require.Contains(t, source, "// AUserHelperFunction implementation")
 }
 
 func assertNoErrors(t *testing.T, pkg string) {

plugin/resolvergen/testdata/followschema/out/home/vektah/projects/99designs/gqlgen/plugin/resolvergen/testdata/followschema/out/resolver.go

@@ -0,0 +1,6 @@
+// This file will not be regenerated automatically.
+//
+// It serves as dependency injection for your app, add any dependencies you require here.
+package customresolver
+
+type CustomResolverType struct{}

plugin/resolvergen/testdata/followschema/out/schema_resolvers.go

@@ -4,17 +4,18 @@ package customresolver
 
 import (
 	"context"
-	"fmt"
 
 	customresolver "github.com/99designs/gqlgen/plugin/resolvergen/testdata/singlefile/out"
 )
 
 func (r *queryCustomResolverType) Resolver(ctx context.Context) (*customresolver.Resolver, error) {
-	panic(fmt.Errorf("not implemented"))
+	// CustomerResolverType.Resolver implementation
+	return nil, nil
 }
 
 func (r *resolverCustomResolverType) Name(ctx context.Context, obj *customresolver.Resolver) (string, error) {
-	panic(fmt.Errorf("not implemented"))
+	// CustomerResolverType.Name implementation
+	return "", nil
 }
 
 func (r *CustomResolverType) Query() customresolver.QueryResolver { return &queryCustomResolverType{r} }
@@ -24,3 +25,13 @@ func (r *CustomResolverType) Resolver() customresolver.ResolverResolver {
 
 type queryCustomResolverType struct{ *CustomResolverType }
 type resolverCustomResolverType struct{ *CustomResolverType }
+
+// !!! WARNING !!!
+// The code below was going to be deleted when updating resolvers. It has been copied here so you have
+// one last chance to move it out of harms way if you want. There are two reasons this happens:
+//  - When renaming or deleting a resolver the old code will be put in here. You can safely delete
+//    it when you're done.
+//  - You have helper methods in this file. Move them out to keep these resolver files clean.
+func AUserHelperFunction() {
+	// AUserHelperFunction implementation
+}