Add a test for --skip-header

Author: Stefan Fruhner

tests/tests.bats

@@ -30,6 +30,30 @@ load test_helper
 
 }
 
+@test "TOC for local README.md with skip headers" {
+    run $BATS_TEST_DIRNAME/../gh-md-toc --skip-header README.md
+    assert_success
+
+    assert_equal "${lines[0]}"  "Table of Contents"
+    assert_equal "${lines[1]}"  "================="
+    assert_equal "${lines[2]}"  "* [Installation](#installation)"
+    assert_equal "${lines[3]}"  "* [Usage](#usage)"
+    assert_equal "${lines[4]}"  "   * [STDIN](#stdin)"
+    assert_equal "${lines[5]}"  "   * [Local files](#local-files)"
+    assert_equal "${lines[6]}"  "   * [Remote files](#remote-files)"
+    assert_equal "${lines[7]}"  "   * [Multiple files](#multiple-files)"
+    assert_equal "${lines[8]}" "   * [Combo](#combo)"
+    assert_equal "${lines[9]}" "   * [Auto insert and update TOC](#auto-insert-and-update-toc)"
+    assert_equal "${lines[10]}" "   * [GitHub token](#github-token)"
+    assert_equal "${lines[11]}" "   * [TOC generation with Github Actions](#toc-generation-with-github-actions)"
+    assert_equal "${lines[12]}" "* [Tests](#tests)"
+    assert_equal "${lines[13]}" "* [Dependency](#dependency)"
+    assert_equal "${lines[14]}" "* [Docker](#docker)"
+    assert_equal "${lines[15]}" "   * [Local](#local)"
+    assert_equal "${lines[16]}" "   * [Public](#public)"
+    assert_equal "${lines[17]}" "Created by [gh-md-toc](https://github.com/ekalinin/github-markdown-toc)"
+
+}
 @test "TOC for remote README.md" {
     run $BATS_TEST_DIRNAME/../gh-md-toc https://github.com/ekalinin/sitemap.js/blob/6bc3eb12c898c1037a35a11b2eb24ababdeb3580/README.md
     assert_success