initial import

core/syncx/immutableresource_test.go

@@ -0,0 +1,78 @@
+package syncx
+
+import (
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestImmutableResource(t *testing.T) {
+	var count int
+	r := NewImmutableResource(func() (interface{}, error) {
+		count++
+		return "hello", nil
+	})
+
+	res, err := r.Get()
+	assert.Equal(t, "hello", res)
+	assert.Equal(t, 1, count)
+	assert.Nil(t, err)
+
+	// again
+	res, err = r.Get()
+	assert.Equal(t, "hello", res)
+	assert.Equal(t, 1, count)
+	assert.Nil(t, err)
+}
+
+func TestImmutableResourceError(t *testing.T) {
+	var count int
+	r := NewImmutableResource(func() (interface{}, error) {
+		count++
+		return nil, errors.New("any")
+	})
+
+	res, err := r.Get()
+	assert.Nil(t, res)
+	assert.NotNil(t, err)
+	assert.Equal(t, "any", err.Error())
+	assert.Equal(t, 1, count)
+
+	// again
+	res, err = r.Get()
+	assert.Nil(t, res)
+	assert.NotNil(t, err)
+	assert.Equal(t, "any", err.Error())
+	assert.Equal(t, 1, count)
+
+	r.refreshInterval = 0
+	time.Sleep(time.Millisecond)
+	res, err = r.Get()
+	assert.Nil(t, res)
+	assert.NotNil(t, err)
+	assert.Equal(t, "any", err.Error())
+	assert.Equal(t, 2, count)
+}
+
+func TestImmutableResourceErrorRefreshAlways(t *testing.T) {
+	var count int
+	r := NewImmutableResource(func() (interface{}, error) {
+		count++
+		return nil, errors.New("any")
+	}, WithRefreshIntervalOnFailure(0))
+
+	res, err := r.Get()
+	assert.Nil(t, res)
+	assert.NotNil(t, err)
+	assert.Equal(t, "any", err.Error())
+	assert.Equal(t, 1, count)
+
+	// again
+	res, err = r.Get()
+	assert.Nil(t, res)
+	assert.NotNil(t, err)
+	assert.Equal(t, "any", err.Error())
+	assert.Equal(t, 2, count)
+}