server: Move all the top level files into cmd folder. (#2490)

This change brings a change which was done for the 'mc'
package to allow for clean repo and have a cleaner
github drop in experience.

cmd/xl-v1_test.go

@@ -0,0 +1,138 @@
+/*
+ * 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 (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// Collection of disks verbatim used for tests.
+var disks = []string{
+	"/mnt/backend1",
+	"/mnt/backend2",
+	"/mnt/backend3",
+	"/mnt/backend4",
+	"/mnt/backend5",
+	"/mnt/backend6",
+	"/mnt/backend7",
+	"/mnt/backend8",
+	"/mnt/backend9",
+	"/mnt/backend10",
+	"/mnt/backend11",
+	"/mnt/backend12",
+	"/mnt/backend13",
+	"/mnt/backend14",
+	"/mnt/backend15",
+	"/mnt/backend16",
+}
+
+// Tests all the expected input disks for function checkSufficientDisks.
+func TestCheckSufficientDisks(t *testing.T) {
+	// List of test cases fo sufficient disk verification.
+	testCases := []struct {
+		disks       []string
+		expectedErr error
+	}{
+		// Even number of disks '6'.
+		{
+			disks[0:6],
+			nil,
+		},
+		// Even number of disks '12'.
+		{
+			disks[0:12],
+			nil,
+		},
+		// Even number of disks '16'.
+		{
+
+			disks[0:16],
+			nil,
+		},
+		// Larger than maximum number of disks > 16.
+		{
+			append(disks[0:16], "/mnt/unsupported"),
+			errXLMaxDisks,
+		},
+		// Lesser than minimum number of disks < 6.
+		{
+			disks[0:3],
+			errXLMinDisks,
+		},
+		// Odd number of disks, not divisible by '2'.
+		{
+			append(disks[0:10], disks[11]),
+			errXLNumDisks,
+		},
+	}
+
+	// Validates different variations of input disks.
+	for i, testCase := range testCases {
+		if checkSufficientDisks(testCase.disks) != testCase.expectedErr {
+			t.Errorf("Test %d expected to pass for disks %s", i+1, testCase.disks)
+		}
+	}
+}
+
+// TestStorageInfo - tests storage info.
+func TestStorageInfo(t *testing.T) {
+	objLayer, fsDirs, err := getXLObjectLayer()
+	if err != nil {
+		t.Fatalf("Unable to initialize 'XL' object layer.")
+	}
+
+	// Remove all dirs.
+	for _, dir := range fsDirs {
+		defer removeAll(dir)
+	}
+
+	// Get storage info first attempt.
+	disks16Info := objLayer.StorageInfo()
+
+	// This test assumes homogenity between all disks,
+	// i.e if we loose one disk the effective storage
+	// usage values is assumed to decrease. If we have
+	// heterogenous environment this is not true all the time.
+	if disks16Info.Free <= 0 {
+		t.Fatalf("Diskinfo total free values should be greater 0")
+	}
+	if disks16Info.Total <= 0 {
+		t.Fatalf("Diskinfo total values should be greater 0")
+	}
+}
+
+// TestNewXL - tests initialization of all input disks
+// and constructs a valid `XL` object
+func TestNewXL(t *testing.T) {
+	var nDisks = 16 // Maximum disks.
+	var erasureDisks []string
+	for i := 0; i < nDisks; i++ {
+		// Do not attempt to create this path, the test validates
+		// so that newFSObjects initializes non existing paths
+		// and successfully returns initialized object layer.
+		disk := filepath.Join(os.TempDir(), "minio-"+nextSuffix())
+		erasureDisks = append(erasureDisks, disk)
+		defer removeAll(disk)
+	}
+	// Initializes all erasure disks
+	_, err := newXLObjects(erasureDisks, nil)
+	if err != nil {
+		t.Fatalf("Unable to initialize erasure, %s", err)
+	}
+}