test for blank args for TF_CLI_ARGS

main.go

@@ -153,7 +153,7 @@ func wrappedMain() int {
 		// after the first non-flag arg.
 		idx := -1
 		for i, v := range args {
-			if v[0] != '-' {
+			if len(v) > 0 && v[0] != '-' {
 				idx = i
 				break
 			}

main_test.go

@@ -56,6 +56,22 @@ func TestMain_cliArgsFromEnv(t *testing.T) {
 			false,
 		},
 
+		{
+			"cli string has blank values",
+			[]string{testCommandName, "bar", "", "baz"},
+			"-foo bar",
+			[]string{"-foo", "bar", "bar", "", "baz"},
+			false,
+		},
+
+		{
+			"cli string has blank values before the command",
+			[]string{"", testCommandName, "bar"},
+			"-foo bar",
+			[]string{"-foo", "bar", "bar"},
+			false,
+		},
+
 		{
 			// this should fail gracefully, this is just testing
 			// that we don't panic with our slice arithmetic