Merge pull request #226 from motemen/test

add tests for package cmdutil

cmdutil/run_test.go

@@ -12,5 +12,25 @@ func TestRunInDirSilently(t *testing.T) {
 	if !strings.HasPrefix(fmt.Sprintf("%s", err), expect) {
 		t.Errorf("error message should have prefix %q, but: %q", expect, err)
 	}
+}
+
+func TestRun(t *testing.T) {
+	err := Run("echo")
+	if err != nil {
+		t.Errorf("error should be nil but: %s", err)
+	}
+}
 
+func TestRunInDir(t *testing.T) {
+	err := RunInDir(".", "echo")
+	if err != nil {
+		t.Errorf("error should be nil but: %s", err)
+	}
+}
+
+func TestRunSilently(t *testing.T) {
+	err := RunSilently("echo")
+	if err != nil {
+		t.Errorf("error should be nil but: %s", err)
+	}
 }