fix : IAM Intialization failing with a large number of users/policies (#11701)

cmd/iam-etcd-store_test.go

@@ -0,0 +1,39 @@
+/*
+ * MinIO Cloud Storage, (C) 2016 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"testing"
+)
+
+func TestExtractPrefixAndSuffix(t *testing.T) {
+	specs := []struct {
+		path, prefix, suffix string
+		expected             string
+	}{
+		{"config/iam/groups/foo.json", "config/iam/groups/", ".json", "foo"},
+		{"config/iam/groups/./foo.json", "config/iam/groups/", ".json", "foo"},
+		{"config/iam/groups/foo/config.json", "config/iam/groups/", "/config.json", "foo"},
+		{"config/iam/groups/foo/config.json", "config/iam/groups/", "config.json", "foo"},
+	}
+	for i, test := range specs {
+		result := extractPathPrefixAndSuffix(test.path, test.prefix, test.suffix)
+		if result != test.expected {
+			t.Errorf("unexpected result on test[%v]: expected[%s] but had [%s]", i, test.expected, result)
+		}
+	}
+}