XL/Unittest: Add testcase for xlMetaV1{} and its methods. (#1938)

fixes #1822

xl-v1-metadata_test.go

@@ -0,0 +1,86 @@
+/*
+ * Minio Cloud Storage, (C) 2015, 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 main
+
+import (
+	"testing"
+)
+
+// Test cases for xlMetaV1{}
+func TestXLMetaV1(t *testing.T) {
+	fiveMB := int64(5 * 1024 * 1024)
+
+	testCases := []struct {
+		partNum  int
+		partName string
+		etag     string
+		size     int64
+		index    int
+	}{
+		{5, "object5", "etag5", fiveMB + 5, 3},
+		{4, "object4", "etag4", fiveMB + 4, 2},
+		{7, "object7", "etag7", fiveMB + 7, 4},
+		{2, "object2", "etag2", fiveMB + 2, 1},
+		{1, "object1", "etag1", fiveMB + 1, 0},
+	}
+
+	// Create a XLMetaV1 structure to test on.
+	meta := newXLMetaV1(8, 8)
+
+	// Add 5 parts.
+	for _, test := range testCases {
+		meta.AddObjectPart(test.partNum, test.partName, test.etag, test.size)
+	}
+
+	// Test for ObjectPartIndex()
+	for i, test := range testCases {
+		expected := test.index
+		got := meta.ObjectPartIndex(test.partNum)
+		if expected != got {
+			t.Errorf("Test %d: Expected %d, obtained %d", i+1, expected, got)
+		}
+	}
+
+	offsetCases := []struct {
+		offset     int64
+		partIndex  int
+		partOffset int64
+	}{
+		{4 * 1024 * 1024, 0, 4 * 1024 * 1024},
+		{8 * 1024 * 1024, 1, 3145727},
+		{12 * 1024 * 1024, 2, 2097149},
+		{16 * 1024 * 1024, 3, 1048569},
+		{20 * 1024 * 1024, 3, 5242873},
+		{24 * 1024 * 1024, 4, 4194292},
+	}
+
+	// Test for ObjectToPartOffset()
+	for i, test := range offsetCases {
+		expectedIndex := test.partIndex
+		expectedOffset := test.partOffset
+		gotIndex, gotOffset, err := meta.ObjectToPartOffset(test.offset)
+		if err != nil {
+			t.Errorf("Test %d: %s", i+1, err)
+		}
+		if gotIndex != expectedIndex {
+			t.Errorf("Test %d: Expected %v got %v", i+1, expectedIndex, gotIndex)
+		}
+		if gotOffset != expectedOffset {
+			t.Errorf("Test %d: Expected %v got %v", i+1, expectedOffset, gotOffset)
+		}
+	}
+}