initial version of cli integration tests

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Upstream-commit: 6db32fdefdae49843ed9535b3af1099e6bd2755d
Component: engine

components/engine/integration-cli/docker_cli_version_test.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+	"testing"
+)
+
+// ensure docker version works
+func TestVersionEnsureSucceeds(t *testing.T) {
+	versionCmd := exec.Command(dockerBinary, "version")
+	out, exitCode, err := runCommandWithOutput(versionCmd)
+	errorOut(err, t, fmt.Sprintf("encountered error while running docker version: %v", err))
+
+	if err != nil || exitCode != 0 {
+		t.Fatal("failed to execute docker version")
+	}
+
+	stringsToCheck := []string{"Client version:", "Go version (client):", "Git commit (client):", "Server version:", "Git commit (server):", "Go version (server):", "Last stable version:"}
+
+	for _, linePrefix := range stringsToCheck {
+		if !strings.Contains(out, linePrefix) {
+			t.Errorf("couldn't find string %v in output", linePrefix)
+		}
+	}
+
+	logDone("version - verify that it works and that the output is properly formatted")
+}