combine: backend to combine multiple remotes in one directory tree

Fixes #5600

backend/combine/combine_test.go

@@ -0,0 +1,79 @@
+// Test Combine filesystem interface
+package combine_test
+
+import (
+	"testing"
+
+	_ "github.com/rclone/rclone/backend/local"
+	_ "github.com/rclone/rclone/backend/memory"
+	"github.com/rclone/rclone/fstest"
+	"github.com/rclone/rclone/fstest/fstests"
+)
+
+// TestIntegration runs integration tests against the remote
+func TestIntegration(t *testing.T) {
+	if *fstest.RemoteName == "" {
+		t.Skip("Skipping as -remote not set")
+	}
+	fstests.Run(t, &fstests.Opt{
+		RemoteName:                   *fstest.RemoteName,
+		UnimplementableFsMethods:     []string{"OpenWriterAt", "DuplicateFiles"},
+		UnimplementableObjectMethods: []string{"MimeType"},
+	})
+}
+
+func TestLocal(t *testing.T) {
+	if *fstest.RemoteName != "" {
+		t.Skip("Skipping as -remote set")
+	}
+	dirs := MakeTestDirs(t, 3)
+	upstreams := "dir1=" + dirs[0] + " dir2=" + dirs[1] + " dir3=" + dirs[2]
+	name := "TestCombineLocal"
+	fstests.Run(t, &fstests.Opt{
+		RemoteName: name + ":dir1",
+		ExtraConfig: []fstests.ExtraConfigItem{
+			{Name: name, Key: "type", Value: "combine"},
+			{Name: name, Key: "upstreams", Value: upstreams},
+		},
+	})
+}
+
+func TestMemory(t *testing.T) {
+	if *fstest.RemoteName != "" {
+		t.Skip("Skipping as -remote set")
+	}
+	upstreams := "dir1=:memory:dir1 dir2=:memory:dir2 dir3=:memory:dir3"
+	name := "TestCombineMemory"
+	fstests.Run(t, &fstests.Opt{
+		RemoteName: name + ":dir1",
+		ExtraConfig: []fstests.ExtraConfigItem{
+			{Name: name, Key: "type", Value: "combine"},
+			{Name: name, Key: "upstreams", Value: upstreams},
+		},
+	})
+}
+
+func TestMixed(t *testing.T) {
+	if *fstest.RemoteName != "" {
+		t.Skip("Skipping as -remote set")
+	}
+	dirs := MakeTestDirs(t, 2)
+	upstreams := "dir1=" + dirs[0] + " dir2=" + dirs[1] + " dir3=:memory:dir3"
+	name := "TestCombineMixed"
+	fstests.Run(t, &fstests.Opt{
+		RemoteName: name + ":dir1",
+		ExtraConfig: []fstests.ExtraConfigItem{
+			{Name: name, Key: "type", Value: "combine"},
+			{Name: name, Key: "upstreams", Value: upstreams},
+		},
+	})
+}
+
+// MakeTestDirs makes directories in /tmp for testing
+func MakeTestDirs(t *testing.T, n int) (dirs []string) {
+	for i := 1; i <= n; i++ {
+		dir := t.TempDir()
+		dirs = append(dirs, dir)
+	}
+	return dirs
+}