milo: Add SwarmBucket templating.

swarming/tasktemplate/template_test.go

Index: swarming/tasktemplate/template_test.go
diff --git a/swarming/tasktemplate/template_test.go b/swarming/tasktemplate/template_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..2bdcced98eec22d2d179e42c1b95d4e86bf84eec
--- /dev/null
+++ b/swarming/tasktemplate/template_test.go
@@ -0,0 +1,46 @@
+// 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 tasktemplate
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestResolve(t *testing.T) {
+	t.Parallel()
+
+	Convey(`Testing substitution resolution`, t, func() {
+		var p Params
+
+		Convey(`With no parameters`, func() {
+			v, err := p.Resolve("foo")
+			So(err, ShouldBeNil)
+			So(v, ShouldEqual, "foo")
+
+			_, err = p.Resolve("${swarming_run_id}")
+			So(err, ShouldNotBeNil)
+
+			_, err = p.Resolve("${undefined}")
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey(`With a "swarming_run_id" parameter defined.`, func() {
+			p.SwarmingRunID = "12345"
+
+			v, err := p.Resolve("foo")
+			So(err, ShouldBeNil)
+			So(v, ShouldEqual, "foo")
+
+			v, err = p.Resolve("${swarming_run_id}")
+			So(err, ShouldBeNil)
+			So(v, ShouldEqual, "12345")
+
+			_, err = p.Resolve("${undefined}")
+			So(err, ShouldNotBeNil)
+		})
+	})
+}