Add test for signal handling

Signed-off-by: David Gageot <[email protected]>

cmd/skaffold/app/cmd/dev.go

@@ -19,9 +19,6 @@ package cmd
 import (
 	"context"
 	"io"
-	"os"
-	"os/signal"
-	"syscall"
 
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
@@ -76,13 +73,3 @@ func dev(out io.Writer) error {
 		}
 	}
 }
-
-func catchCtrlC(cancel context.CancelFunc) {
-	signals := make(chan os.Signal, 1)
-	signal.Notify(signals, os.Interrupt, syscall.SIGTERM, syscall.SIGINT, syscall.SIGPIPE)
-
-	go func() {
-		<-signals
-		cancel()
-	}()
-}

cmd/skaffold/app/cmd/signals.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2018 The Skaffold 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 cmd
+
+import (
+	"context"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func catchCtrlC(cancel context.CancelFunc) {
+	signals := make(chan os.Signal, 1)
+	signal.Notify(signals,
+		syscall.SIGTERM,
+		syscall.SIGINT,
+		syscall.SIGPIPE,
+	)
+
+	go func() {
+		<-signals
+		cancel()
+	}()
+}

cmd/skaffold/app/cmd/signals_test.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2018 The Skaffold 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 cmd
+
+import (
+	"context"
+	"sync"
+	"syscall"
+	"testing"
+)
+
+func TestCatchCtrlC(t *testing.T) {
+	var wg sync.WaitGroup
+	wg.Add(1)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	catchCtrlC(cancel)
+
+	go func() {
+		<-ctx.Done()
+		wg.Done()
+	}()
+
+	syscall.Kill(syscall.Getpid(), syscall.SIGINT)
+
+	wg.Wait()
+}