Milo: Swarming module test coverage

milo/appengine/swarming/buildLog_test.go

Index: milo/appengine/swarming/buildLog_test.go
diff --git a/milo/appengine/swarming/buildLog_test.go b/milo/appengine/swarming/buildLog_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..37c92f5f429e08da744dd823947bc946481c8594
--- /dev/null
+++ b/milo/appengine/swarming/buildLog_test.go
@@ -0,0 +1,34 @@
+package swarming
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/luci/gae/impl/memory"
+	"github.com/luci/luci-go/common/clock/testclock"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+var testSvc = &debugSwarmingService{
+	tc: &testCase{
+		name:        "build-patch-failure",
+		swarmResult: "build-patch-failure.swarm",
+		swarmOutput: "build-patch-failure",
+	},
+}
+
+func TestBuildLogs(t *testing.T) {
+	c := context.Background()
+	c, _ = testclock.UseTime(c, testclock.TestRecentTimeUTC)
+	c = memory.UseWithAppID(c, "dev~luci-milo")
+	Convey(`Build log tests`, t, func() {
+		_, _, err := swarmingBuildLogImpl(c, testSvc, "12340", "/update_scripts/0/stdout")
+		So(err, ShouldBeNil)
+	})
+	Convey(`List available streams`, t, func() {
+		_, _, err := swarmingBuildLogImpl(c, testSvc, "12340", "/notexist")
+		So(strings.HasPrefix(err.Error(), "stream \"steps/notexist\" not found"), ShouldEqual, true)
+	})
+}