datastore: variadic Get, Put, Exists, Delete.

service/datastore/types_test.go

Index: service/datastore/types_test.go
diff --git a/service/datastore/types_test.go b/service/datastore/types_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..c79dbb9dfdb4a83f860a94c27ef9d42b782be2ad
--- /dev/null
+++ b/service/datastore/types_test.go
@@ -0,0 +1,102 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package datastore
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestExistsResult(t *testing.T) {
+	t.Parallel()
+
+	Convey(`Testing ExistsResult`, t, func() {
+		var er ExistsResult
+
+		Convey(`With no elements`, func() {
+			er.init()
+
+			So(er.All(), ShouldBeTrue)
+			So(er.Any(), ShouldBeFalse)
+			So(er.List(), ShouldResemble, BoolList{})
+		})
+
+		Convey(`With single-tier elements`, func() {
+			er.init(1, 1, 1, 1)
+
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeFalse)
+			So(er.List(), ShouldResemble, BoolList{false, false, false, false})
+
+			er.set(0, 0)
+			er.set(2, 0)
+
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeTrue)
+			So(er.List(), ShouldResemble, BoolList{true, false, true, false})
+			So(er.List(0), ShouldResemble, BoolList{true})
+			So(er.Get(0, 0), ShouldBeTrue)
+			So(er.List(1), ShouldResemble, BoolList{false})
+			So(er.Get(1, 0), ShouldBeFalse)
+			So(er.List(2), ShouldResemble, BoolList{true})
+			So(er.Get(2, 0), ShouldBeTrue)
+			So(er.List(3), ShouldResemble, BoolList{false})
+			So(er.Get(3, 0), ShouldBeFalse)
+		})
+
+		Convey(`With combined single- and multi-tier elements`, func() {
+			er.init(1, 0, 3, 2)
+
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeFalse)
+			So(er.List(), ShouldResemble, BoolList{false, false, false, false})
+
+			// Set everything except (2, 1).
+			er.set(0, 0)
+			er.set(2, 0)
+			er.set(2, 2)
+			er.set(3, 0)
+			er.set(3, 1)
+
+			er.updateSlices()
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeTrue)
+			So(er.List(), ShouldResemble, BoolList{true, true, false, true})
+			So(er.List(0), ShouldResemble, BoolList{true})
+			So(er.List(1), ShouldResemble, BoolList(nil))
+			So(er.List(2), ShouldResemble, BoolList{true, false, true})
+			So(er.Get(2, 0), ShouldBeTrue)
+			So(er.Get(2, 1), ShouldBeFalse)
+			So(er.List(3), ShouldResemble, BoolList{true, true})
+
+			// Set the missing boolean.
+			er.set(2, 1)
+			er.updateSlices()
+			So(er.All(), ShouldBeTrue)
+		})
+
+		Convey(`Zero-length slices are handled properly.`, func() {
+			er.init(1, 0, 0, 1)
+
+			er.updateSlices()
+			So(er.List(), ShouldResemble, BoolList{false, true, true, false})
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeFalse)
+
+			er.set(0, 0)
+			er.updateSlices()
+			So(er.List(), ShouldResemble, BoolList{true, true, true, false})
+			So(er.All(), ShouldBeFalse)
+			So(er.Any(), ShouldBeTrue)
+
+			er.set(3, 0)
+			er.updateSlices()
+			So(er.List(), ShouldResemble, BoolList{true, true, true, true})
+			So(er.All(), ShouldBeTrue)
+			So(er.Any(), ShouldBeTrue)
+		})
+	})
+}