add basic test for dynamodb (#73)

checkpoint/ddb/ddb_test.go

@@ -0,0 +1,104 @@
+package ddb
+
+import (
+	"testing"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/dynamodb"
+)
+
+type fakeRetryer struct {
+	Name string
+}
+
+func (r *fakeRetryer) ShouldRetry(err error) bool {
+	r.Name = "fakeRetryer"
+	return false
+}
+
+func TestNewCheckpoint(t *testing.T) {
+	c, err := New("", "")
+	if c == nil {
+		t.Errorf("expected checkpoint client instance. got %v", c)
+	}
+	if err != nil {
+		t.Errorf("new checkpoint error expected nil. got %v", err)
+	}
+}
+
+func TestCheckpointSetting(t *testing.T) {
+	var ck Checkpoint
+	ckPtr := &ck
+
+	// Test WithMaxInterval
+	setInterval := WithMaxInterval(time.Duration(2 * time.Minute))
+	setInterval(ckPtr)
+
+	// Test WithRetryer
+	var r fakeRetryer
+	setRetryer := WithRetryer(&r)
+	setRetryer(ckPtr)
+
+	// Test WithDyanmoDBClient
+	var fakeDbClient = dynamodb.New(
+		session.New(aws.NewConfig()), &aws.Config{
+			Region: aws.String("us-west-2"),
+		},
+	)
+	setDDBClient := WithDynamoClient(fakeDbClient)
+	setDDBClient(ckPtr)
+
+	if ckPtr.maxInterval != time.Duration(2*time.Minute) {
+		t.Errorf("new checkpoint maxInterval expected 2 minute. got %v", ckPtr.maxInterval)
+	}
+	if ckPtr.retryer.ShouldRetry(nil) != false {
+		t.Errorf("new checkpoint retryer ShouldRetry always returns %v . got %v", false, ckPtr.retryer.ShouldRetry(nil))
+	}
+	if ckPtr.client != fakeDbClient {
+		t.Errorf("new checkpoint dynamodb client reference should be  %p. got %v", &fakeDbClient, ckPtr.client)
+	}
+}
+
+func TestNewCheckpointWithOptions(t *testing.T) {
+	// Test WithMaxInterval
+	setInterval := WithMaxInterval(time.Duration(2 * time.Minute))
+
+	// Test WithRetryer
+	var r fakeRetryer
+	setRetryer := WithRetryer(&r)
+
+	// Test WithDyanmoDBClient
+	var fakeDbClient = dynamodb.New(
+		session.New(aws.NewConfig()), &aws.Config{
+			Region: aws.String("us-west-2"),
+		},
+	)
+	setDDBClient := WithDynamoClient(fakeDbClient)
+
+	ckPtr, err := New("testapp", "testtable", setInterval, setRetryer, setDDBClient)
+	if ckPtr == nil {
+		t.Errorf("expected checkpoint client instance. got %v", ckPtr)
+	}
+	if err != nil {
+		t.Errorf("new checkpoint error expected nil. got %v", err)
+	}
+	if ckPtr.appName != "testapp" {
+		t.Errorf("new checkpoint app name expected %v. got %v", "testapp", ckPtr.appName)
+	}
+	if ckPtr.tableName != "testtable" {
+		t.Errorf("new checkpoint table expected %v. got %v", "testtable", ckPtr.maxInterval)
+	}
+
+	if ckPtr.maxInterval != time.Duration(2*time.Minute) {
+		t.Errorf("new checkpoint maxInterval expected 2 minute. got %v", ckPtr.maxInterval)
+	}
+	if ckPtr.retryer.ShouldRetry(nil) != false {
+		t.Errorf("new checkpoint retryer ShouldRetry always returns %v . got %v", false, ckPtr.retryer.ShouldRetry(nil))
+	}
+	if ckPtr.client != fakeDbClient {
+		t.Errorf("new checkpoint dynamodb client reference should be  %p. got %v", &fakeDbClient, ckPtr.client)
+	}
+
+}

checkpoint/ddb/retryer_test.go

@@ -0,0 +1,24 @@
+package ddb
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/service/dynamodb"
+)
+
+func TestDefaultRetyer(t *testing.T) {
+	retryableError := awserr.New(dynamodb.ErrCodeProvisionedThroughputExceededException, "error is retryable", errors.New("don't care what is here"))
+	// retryer is not nil and should returns according to what error is passed in.
+	q := &DefaultRetryer{}
+	if q.ShouldRetry(retryableError) != true {
+		t.Errorf("expected ShouldRetry returns %v. got %v", false, q.ShouldRetry(retryableError))
+	}
+
+	nonRetryableError := awserr.New(dynamodb.ErrCodeBackupInUseException, "error is not retryable", errors.New("don't care what is here"))
+	shouldRetry := q.ShouldRetry(nonRetryableError)
+	if shouldRetry != false {
+		t.Errorf("expected ShouldRetry returns %v. got %v", true, shouldRetry)
+	}
+}