Milo: Prefetch logs that are failures

milo/appengine/swarming/build_test.go

Index: milo/appengine/swarming/build_test.go
diff --git a/milo/appengine/swarming/build_test.go b/milo/appengine/swarming/build_test.go
index fc422c4975e890953c9b3bf5d38d5855ab275756..8af012183bf97dd838242373ee7d760da2b60716 100644
--- a/milo/appengine/swarming/build_test.go
+++ b/milo/appengine/swarming/build_test.go
@@ -42,7 +42,7 @@ func TestBuild(t *testing.T) {
 	if *generate {
 		for _, tc := range getTestCases() {
 			fmt.Printf("Generating expectations for %s\n", tc)
-			build, err := swarmingBuildImpl(c, "foo", "debug", tc)
+			build, _, err := swarmingBuildImpl(c, "foo", "debug", tc)
 			if err != nil {
 				panic(fmt.Errorf("Could not run swarmingBuildImpl for %s: %s", tc, err))
 			}
@@ -62,7 +62,7 @@ func TestBuild(t *testing.T) {
 	Convey(`A test Environment`, t, func() {
 		for _, tc := range getTestCases() {
 			Convey(fmt.Sprintf("Test Case: %s", tc), func() {
-				build, err := swarmingBuildImpl(c, "foo", "debug", tc)
+				build, _, err := swarmingBuildImpl(c, "foo", "debug", tc)
 				So(err, ShouldBeNil)
 				So(build, shouldMatchExpectationsFor, tc+".json")
 			})