Milo: Increase test coverage for appengine/buildbot

milo/appengine/buildbot/master_test.go

Index: milo/appengine/buildbot/master_test.go
diff --git a/milo/appengine/buildbot/master_test.go b/milo/appengine/buildbot/master_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..d29074eeb7372cdce25f76b5d043879f77534da0
--- /dev/null
+++ b/milo/appengine/buildbot/master_test.go
@@ -0,0 +1,41 @@
+// Copyright 2017 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package buildbot
+
+import (
+	"context"
+	"testing"
+
+	"github.com/luci/gae/impl/memory"
+	"github.com/luci/gae/service/datastore"
+	"github.com/luci/luci-go/common/clock/testclock"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestMaster(t *testing.T) {
+	c := memory.UseWithAppID(context.Background(), "dev~luci-milo")
+	c, _ = testclock.UseTime(c, testclock.TestTimeUTC)
+	datastore.GetTestable(c).Consistent(true)
+	datastore.GetTestable(c).AutoIndex(true)
+	datastore.GetTestable(c).CatchupIndexes()
+
+	Convey(`Tests for master`, t, func() {
+		So(putDSMasterJSON(c, &buildbotMaster{
+			Name:     "fake",
+			Builders: map[string]*buildbotBuilder{"fake": {}},
+		}, false), ShouldBeNil)
+		So(putDSMasterJSON(c, &buildbotMaster{
+			Name:     "fake internal",
+			Builders: map[string]*buildbotBuilder{"fake": {}},
+		}, true), ShouldBeNil)
+
+		Convey(`GetAllBuilders()`, func() {
+			cs, err := GetAllBuilders(c)
+			So(err, ShouldBeNil)
+			So(len(cs.BuilderGroups), ShouldEqual, 1)
+		})
+	})
+}