Move runtime to core/runtime

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

core/runtime/v2/manager_test.go

@@ -0,0 +1,98 @@
+//go:build !windows && !darwin
+
+/*
+   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 v2
+
+import (
+	"os"
+	"testing"
+)
+
+// setupAbsoluteShimPath creates a temporary directory in $PATH with an empty
+// shim executable file in it to test the exec.LookPath branch of resolveRuntimePath
+func setupAbsoluteShimPath(t *testing.T) (string, error) {
+	tempShimDir := t.TempDir()
+
+	_, err := os.Create(tempShimDir + "/containerd-shim-runc-v2")
+	if err != nil {
+		return "", err
+	}
+
+	t.Setenv("PATH", tempShimDir+":"+os.Getenv("PATH"))
+	absoluteShimPath := tempShimDir + "/containerd-shim-runc-v2"
+
+	err = os.Chmod(absoluteShimPath, 0777)
+	if err != nil {
+		return "", err
+	}
+
+	return absoluteShimPath, nil
+}
+
+func TestResolveRuntimePath(t *testing.T) {
+	sm := &ShimManager{}
+	absoluteShimPath, err := setupAbsoluteShimPath(t)
+	if err != nil {
+		t.Errorf("Failed to create temporary shim path: %q", err)
+	}
+
+	tests := []struct {
+		runtime string
+		want    string
+	}{
+		{ // Absolute path
+			runtime: absoluteShimPath,
+			want:    absoluteShimPath,
+		},
+		{ // Binary name
+			runtime: "io.containerd.runc.v2",
+			want:    absoluteShimPath,
+		},
+		{ // Invalid absolute path
+			runtime: "/fake/abs/path",
+			want:    "",
+		},
+		{ // No name
+			runtime: "",
+			want:    "",
+		},
+		{ // Relative Path
+			runtime: "./containerd-shim-runc-v2",
+			want:    "",
+		},
+		{
+			runtime: "fake/containerd-shim-runc-v2",
+			want:    "",
+		},
+		{
+			runtime: "./fake/containerd-shim-runc-v2",
+			want:    "",
+		},
+		{ // Relative Path or Bad Binary Name
+			runtime: ".io.containerd.runc.v2",
+			want:    "",
+		},
+	}
+
+	for _, c := range tests {
+		have, _ := sm.resolveRuntimePath(c.runtime)
+		if have != c.want {
+			t.Errorf("Expected %q, got %q", c.want, have)
+		}
+	}
+}