Milo: Increase test coverage for appengine/buildbot

milo/appengine/buildbot/master_test.go

+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)
+                })
+        })
+}