Check errors on loading package (#130)

pkg/moq/moq.go

@@ -222,6 +222,12 @@ func pkgInfoFromPath(srcDir string, mode packages.LoadMode) (*packages.Package,
 	if len(pkgs) > 1 {
 		return nil, errors.New("More than one package was found")
 	}
+	if errs := pkgs[0].Errors; len(errs) != 0 {
+		if len(errs) == 1 {
+			return nil, errs[0]
+		}
+		return nil, fmt.Errorf("%s (and %d more errors)", errs[0], len(errs)-1)
+	}
 	return pkgs[0], nil
 }
 

pkg/moq/moq_test.go

@@ -544,6 +544,17 @@ func TestImportedPackageWithSameName(t *testing.T) {
 	}
 }
 
+func TestParseError(t *testing.T) {
+	_, err := New(Config{SrcDir: "testpackages/_parseerror/service"})
+	if err == nil {
+		t.Errorf("expected error but got nil")
+		return
+	}
+	if !strings.Contains(err.Error(), `could not import github.com/matryer/notexist (invalid package name: "")`) {
+		t.Errorf("unexpected error: %s", err.Error())
+	}
+}
+
 // normalize normalizes \r\n (windows) and \r (mac)
 // into \n (unix)
 func normalize(d []byte) []byte {

pkg/moq/testpackages/_parseerror/service/service.go

@@ -0,0 +1,8 @@
+package service
+
+import "github.com/matryer/notexist"
+
+// Service does something good with computers.
+type Service interface {
+	DoSomething(notexist.SomeType) error
+}