added test to increase coverage #31

pkg/config/app_config_test.go

@@ -1,7 +1,10 @@
 package config
 
 import (
+	"os"
 	"testing"
+
+	"github.com/jesseduffield/yaml"
 )
 
 func TestDockerComposeCommandNoFiles(t *testing.T) {
@@ -48,3 +51,50 @@ func TestDockerComposeCommandMultipleFiles(t *testing.T) {
 		t.Fatalf("Expected %s but got %s", expected, actual)
 	}
 }
+
+func TestWritingToConfigFile(t *testing.T) {
+	//init the AppConfig
+	emptyComposeFiles := []string{}
+	conf, err := NewAppConfig("name", "version", "commit", "date", "buildSource", false, emptyComposeFiles, "projectDir")
+	if err != nil {
+		t.Fatalf("Unexpected error: %s", err)
+	}
+
+	testFn := func(ac *AppConfig, newReportingValue string, t *testing.T) {
+		updateFn := func(uc *UserConfig) error {
+			uc.Reporting = newReportingValue
+			return nil
+		}
+
+		err = ac.WriteToUserConfig(updateFn)
+		if err != nil {
+			t.Fatalf("Unexpected error: %s", err)
+		}
+
+		file, err := os.OpenFile(ac.ConfigFilename(), os.O_RDONLY, 0660)
+		if err != nil {
+			t.Fatalf("Unexpected error: %s", err)
+		}
+
+		sampleUC := UserConfig{}
+		err = yaml.NewDecoder(file).Decode(&sampleUC)
+		if err != nil {
+			t.Fatalf("Unexpected error: %s", err)
+		}
+
+		err = file.Close()
+		if err != nil {
+			t.Fatalf("Unexpected error: %s", err)
+		}
+
+		if sampleUC.Reporting != newReportingValue {
+			t.Fatalf("Got %s, Expected %s\n", sampleUC.Reporting, newReportingValue)
+		}
+	}
+
+	// insert value into an empty file
+	testFn(conf, "on", t)
+
+	// modifying an existing file that already has 'Reporting'
+	testFn(conf, "off", t)
+}