Move remotes to core/remotes

Signed-off-by: Derek McGowan <derek@mcg.dev>

core/remotes/docker/handler_test.go

@@ -0,0 +1,133 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package docker
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/containerd/containerd/v2/labels"
+	"github.com/containerd/containerd/v2/reference"
+)
+
+func TestAppendDistributionLabel(t *testing.T) {
+	for _, tc := range []struct {
+		originLabel string
+		repo        string
+		expected    string
+	}{
+		{
+			originLabel: "",
+			repo:        "",
+			expected:    "",
+		},
+		{
+			originLabel: "",
+			repo:        "library/busybox",
+			expected:    "library/busybox",
+		},
+		{
+			originLabel: "library/busybox",
+			repo:        "library/busybox",
+			expected:    "library/busybox",
+		},
+		// remove the duplicate one in origin
+		{
+			originLabel: "library/busybox,library/redis,library/busybox",
+			repo:        "library/alpine",
+			expected:    "library/alpine,library/busybox,library/redis",
+		},
+		// remove the empty repo
+		{
+			originLabel: "library/busybox,library/redis,library/busybox",
+			repo:        "",
+			expected:    "library/busybox,library/redis",
+		},
+		{
+			originLabel: "library/busybox,library/redis,library/busybox",
+			repo:        "library/redis",
+			expected:    "library/busybox,library/redis",
+		},
+	} {
+		if got := appendDistributionSourceLabel(tc.originLabel, tc.repo); !reflect.DeepEqual(got, tc.expected) {
+			t.Fatalf("expected %v, but got %v", tc.expected, got)
+		}
+	}
+}
+
+func TestDistributionSourceLabelKey(t *testing.T) {
+	expected := labels.LabelDistributionSource + ".testsource"
+	if got := distributionSourceLabelKey("testsource"); !reflect.DeepEqual(got, expected) {
+		t.Fatalf("expected %v, but got %v", expected, got)
+	}
+}
+
+func TestCommonPrefixComponents(t *testing.T) {
+	for _, tc := range []struct {
+		components []string
+		target     string
+		expected   int
+	}{
+		{
+			components: []string{"foo"},
+			target:     "foo/bar",
+			expected:   1,
+		},
+		{
+			components: []string{"bar"},
+			target:     "foo/bar",
+			expected:   0,
+		},
+		{
+			components: []string{"foo", "bar"},
+			target:     "foo/bar",
+			expected:   2,
+		},
+	} {
+		if got := commonPrefixComponents(tc.components, tc.target); !reflect.DeepEqual(got, tc.expected) {
+			t.Fatalf("expected %v, but got %v", tc.expected, got)
+		}
+	}
+}
+
+func TestSelectRepositoryMountCandidate(t *testing.T) {
+	for _, tc := range []struct {
+		refspec  reference.Spec
+		source   map[string]string
+		expected string
+	}{
+		{
+			refspec:  reference.Spec{},
+			source:   map[string]string{"": ""},
+			expected: "",
+		},
+		{
+			refspec:  reference.Spec{Locator: "user@host/path"},
+			source:   map[string]string{labels.LabelDistributionSource + ".host": "foo,path,bar"},
+			expected: "bar",
+		},
+		{
+			refspec:  reference.Spec{Locator: "user@host/path"},
+			source:   map[string]string{labels.LabelDistributionSource + ".host": "foo,bar,path"},
+			expected: "bar",
+		},
+	} {
+		if got := selectRepositoryMountCandidate(tc.refspec, tc.source); !reflect.DeepEqual(got, tc.expected) {
+			t.Fatalf("expected %v, but got %v", tc.expected, got)
+		}
+	}
+}