Add extensive tests for choosing git refs; See #12

handle_test.go

@@ -0,0 +1,111 @@
+// Copyright 2014 The Azul3D Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package semver
+
+import "testing"
+
+var refTestData = map[string]*gitRef{
+	"v0": &gitRef{
+		Name: "refs/heads/master",
+		Hash: "001",
+	},
+	"v1": &gitRef{
+		Name:       "refs/tags/v1",
+		Hash:       "002",
+		PeeledHash: "003",
+	},
+	"v1.0.1": &gitRef{
+		Name: "refs/tags/v1.0.1",
+		Hash: "004",
+	},
+	"v1.2": &gitRef{
+		Name:       "refs/tags/v1.2",
+		Hash:       "005",
+		PeeledHash: "006",
+	},
+	"v2-unstable": &gitRef{
+		Name: "refs/heads/v2-unstable",
+		Hash: "007",
+	},
+}
+
+func testChooseRef(t *testing.T, expect, target string, all []*gitRef) {
+	v := ParseVersion(target)
+	want := refTestData[expect]
+	h := &Handler{}
+	chosenHash, ok := h.chooseRef(all, v)
+	wantOk := len(expect) > 0
+	if ok != wantOk {
+		t.Fatalf("chooseRef returned ok=%t, want ok=%t\n", ok, wantOk)
+		return
+	}
+	if !wantOk {
+		return
+	}
+	if chosenHash != want.BestHash() {
+		t.Logf("got %q\n", chosenHash)
+		t.Fatalf("expected %q\n", want.BestHash())
+	}
+}
+
+func TestChooseRefAscending(t *testing.T) {
+	target := "v1"
+	expect := "v1.2"
+	testChooseRef(t, expect, target, []*gitRef{
+		refTestData["v0"],
+		refTestData["v1.0.1"],
+		refTestData["v1"],
+		refTestData["v1.2"],
+		refTestData["v2-unstable"],
+	})
+}
+
+func TestChooseRefDescending(t *testing.T) {
+	target := "v1"
+	expect := "v1.2"
+	testChooseRef(t, expect, target, []*gitRef{
+		refTestData["v2-unstable"],
+		refTestData["v1.2"],
+		refTestData["v1"],
+		refTestData["v1.0.1"],
+		refTestData["v0"],
+	})
+}
+
+func TestChooseRefRandom(t *testing.T) {
+	target := "v1"
+	expect := "v1.2"
+	testChooseRef(t, expect, target, []*gitRef{
+		refTestData["v1.0.1"],
+		refTestData["v1"],
+		refTestData["v2-unstable"],
+		refTestData["v1.2"],
+		refTestData["v0"],
+	})
+}
+
+func TestChooseRefUnstable(t *testing.T) {
+	target := "v2-unstable"
+	expect := "v2-unstable"
+	testChooseRef(t, expect, target, []*gitRef{
+		refTestData["v1.0.1"],
+		refTestData["v1"],
+		refTestData["v2-unstable"],
+		refTestData["v1.2"],
+		refTestData["v0"],
+	})
+}
+
+func TestChooseRefInvalid(t *testing.T) {
+	target := "v2"
+	expect := ""
+	testChooseRef(t, expect, target, []*gitRef{
+		refTestData["v1.0.1"],
+		refTestData["v1"],
+		refTestData["v2-unstable"],
+		refTestData["v1.2"],
+		refTestData["v0"],
+	})
+}