test: add test for ignoreSig configuration

Author: tomarrell

go.mod

@@ -6,4 +6,5 @@ require (
 	github.com/spf13/viper v1.7.1
 	github.com/stretchr/testify v1.6.1
 	golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
 )

wrapcheck/testdata/ignoreSigs_config/.wrapcheck.yaml

@@ -0,0 +1,2 @@
+ignoreSigs:
+- json.Marshal(

wrapcheck/testdata/ignoreSigs_config/main.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"encoding/json"
+)
+
+func main() {
+	do()
+}
+
+func do() error {
+	_, err := json.Marshal(struct{}{})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

wrapcheck/wrapcheck.go

@@ -38,7 +38,7 @@ type WrapcheckConfig struct {
 	// Note: Setting this value will intentionally override the default ignored
 	// sigs. To achieve the same behaviour as default, you should add the default
 	// list to your config.
-	IgnoreSigs []string `mapstructure:"ignoreSigs"`
+	IgnoreSigs []string `mapstructure:"ignoreSigs" yaml:"ignoreSigs"`
 }
 
 func NewDefaultConfig() WrapcheckConfig {

wrapcheck/wrapcheck_test.go

@@ -2,12 +2,14 @@ package wrapcheck
 
 import (
 	"io/ioutil"
+	"os"
 	"path"
 	"path/filepath"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/tools/go/analysis/analysistest"
+	"gopkg.in/yaml.v3"
 )
 
 func TestAnalyzer(t *testing.T) {
@@ -24,10 +26,21 @@ func TestAnalyzer(t *testing.T) {
 				t.Fatalf("cannot run on non-directory: %s", f.Name())
 			}
 
-			p, err := filepath.Abs(path.Join("./testdata", f.Name()))
+			dirPath, err := filepath.Abs(path.Join("./testdata", f.Name()))
 			assert.NoError(t, err)
-			analysistest.Run(t, p, NewAnalyzer(NewDefaultConfig()))
+
+			configPath := path.Join(dirPath, ".wrapcheck.yaml")
+			if _, err := os.Stat(configPath); os.IsNotExist(err) {
+				analysistest.Run(t, dirPath, NewAnalyzer(NewDefaultConfig()))
+			} else {
+				configFile, err := os.ReadFile(configPath)
+				assert.NoError(t, err)
+
+				var config WrapcheckConfig
+				assert.NoError(t, yaml.Unmarshal(configFile, &config))
+
+				analysistest.Run(t, dirPath, NewAnalyzer(config))
+			}
 		})
 	}
-
 }