Move shim package to pkg

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

pkg/shim/shim_test.go

@@ -0,0 +1,62 @@
+/*
+   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 shim
+
+import (
+	"context"
+	"runtime"
+	"testing"
+)
+
+func TestRuntimeWithEmptyMaxEnvProcs(t *testing.T) {
+	var oldGoMaxProcs = runtime.GOMAXPROCS(0)
+	defer runtime.GOMAXPROCS(oldGoMaxProcs)
+
+	t.Setenv("GOMAXPROCS", "")
+	setRuntime()
+
+	var currentGoMaxProcs = runtime.GOMAXPROCS(0)
+	if currentGoMaxProcs != 2 {
+		t.Fatal("the max number of procs should be 2")
+	}
+}
+
+func TestRuntimeWithNonEmptyMaxEnvProcs(t *testing.T) {
+	t.Setenv("GOMAXPROCS", "not_empty")
+	setRuntime()
+	var oldGoMaxProcs2 = runtime.GOMAXPROCS(0)
+	if oldGoMaxProcs2 != runtime.NumCPU() {
+		t.Fatal("the max number CPU should be equal to available CPUs")
+	}
+}
+
+func TestShimOptWithValue(t *testing.T) {
+	ctx := context.TODO()
+	ctx = context.WithValue(ctx, OptsKey{}, Opts{Debug: true})
+
+	o := ctx.Value(OptsKey{})
+	if o == nil {
+		t.Fatal("opts nil")
+	}
+	op, ok := o.(Opts)
+	if !ok {
+		t.Fatal("opts not of type Opts")
+	}
+	if !op.Debug {
+		t.Fatal("opts.Debug should be true")
+	}
+}