vpython: Add environment spec package.

vpython/spec/spec_test.go

+// 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 spec
+
+import (
+        "testing"
+
+        "github.com/luci/luci-go/vpython/api/vpython"
+
+        . "github.com/luci/luci-go/common/testing/assertions"
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestNormalizeAndHash(t *testing.T) {
+        t.Parallel()
+
+        pkgFoo := &vpython.Spec_Package{Path: "foo", Version: "1"}
+        pkgBar := &vpython.Spec_Package{Path: "bar", Version: "2"}
+        pkgBaz := &vpython.Spec_Package{Path: "baz", Version: "3"}
+
+        Convey(`Test manifest generation`, t, func() {
+                var spec vpython.Spec
+
+                Convey(`Will normalize an empty spec`, func() {
+                        So(Normalize(&spec), ShouldBeNil)
+                        So(spec, ShouldResemble, vpython.Spec{})
+                })
+
+                Convey(`Will normalize to sorted order.`, func() {
+                        spec.Wheel = []*vpython.Spec_Package{pkgFoo, pkgBar, pkgBaz}
+                        So(Normalize(&spec), ShouldBeNil)
+                        So(spec, ShouldResemble, vpython.Spec{
+                                Wheel: []*vpython.Spec_Package{pkgBar, pkgBaz, pkgFoo},
+                        })
+
+                        So(Hash(&spec), ShouldEqual, "904b958b73206e64ce267e2b6df5fa0f1223e348327dba5e9a5f6421bb42cadb")
+                })
+
+                Convey(`Will fail to normalize if there are duplicate wheels.`, func() {
+                        spec.Wheel = []*vpython.Spec_Package{pkgFoo, pkgFoo, pkgBar, pkgBaz}
+                        So(Normalize(&spec), ShouldErrLike, "duplicate spec entries")
+
+                        // Even if the versions differ.
+                        fooClone := *pkgFoo
+                        fooClone.Version = "other"
+                        spec.Wheel = []*vpython.Spec_Package{pkgFoo, &fooClone, pkgBar, pkgBaz}
+                        So(Normalize(&spec), ShouldErrLike, "duplicate spec entries")
+                })
+        })
+}