update test cases

core/econf/conf_api_test.go

@@ -1,7 +1,6 @@
 package econf
 
 import (
-	"fmt"
 	"io/ioutil"
 	"log"
 	"net/url"
@@ -115,12 +114,13 @@ func newWithConfigFile(t *testing.T) (*Configuration, string, func(), *sync.Wait
 	require.Nil(t, err)
 	content, err := os.ReadFile(configFile)
 	if err != nil {
-		t.Logf("Content of configFile: %v\n", string(content))
+		log.Panicf("Error: %v\n", err)
 	}
-	fmt.Println("Content of configFile:", string(content))
+	t.Logf("Content of configFile: %v\n", string(content))
 
 	cleanup := func() {
-		_ = os.RemoveAll(watchDir)
+		err1 := os.RemoveAll(watchDir)
+		assert.NoError(t, err1)
 	}
 
 	v := New()
@@ -155,7 +155,8 @@ func newWithSymlinkedConfigFile(t *testing.T) (*Configuration, string, string, f
 	err = os.WriteFile(realConfigFile, []byte(`foo= "baz"`), 0640)
 	require.Nil(t, err)
 	cleanup := func() {
-		_ = os.RemoveAll(watchDir)
+		err1 := os.RemoveAll(watchDir)
+		assert.NoError(t, err1)
 	}
 	// now, symlink the tm `data1` dir to `data` in the baseDir
 	err = os.Symlink(dataDir1, path.Join(watchDir, "data"))