packer: tests for RemoteCommand.Wait

packer/communicator_test.go

+package packer
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRemoteCommand_WaitBlocks(t *testing.T) {
+	t.Parallel()
+
+	rc := &RemoteCommand{}
+
+	complete := make(chan bool)
+
+	// Make a goroutine that never exits. Since this is just in a test,
+	// this should be okay.
+	go func() {
+		rc.Wait()
+		complete <- true
+	}()
+
+	select {
+	case <-complete:
+		t.Fatal("It never should've completed")
+	case <-time.After(500 * time.Millisecond):
+		// All is well
+	}
+}
+
+func TestRemoteCommand_WaitCompletes(t *testing.T) {
+	t.Parallel()
+
+	rc := &RemoteCommand{}
+
+	complete := make(chan bool)
+	go func() {
+		rc.Wait()
+		complete <- true
+	}()
+
+	// Flag that it completed
+	rc.Exited = true
+
+	select {
+	case <-complete:
+		// All is well
+	case <-time.After(1 * time.Second):
+		t.Fatal("Timeout waiting for command completion.")
+	}
+}