@Test
public void shouldNotOutputNothingIfListIsNull()
throws ParseException, CompileException, RenderException {
JtwigTemplate template = new JtwigTemplate("{% for item in list %}a{% endfor %}");
JtwigContext context = new JtwigContext();
context.withModelAttribute("list", null);
assertThat(template.output(context), is(""));
}
@Test
public void emptyListShouldOutputNothing()
throws ParseException, CompileException, RenderException {
JtwigTemplate template = new JtwigTemplate("{% for item in list %}Item {{ item }}{% endfor %}");
JtwigContext context = new JtwigContext();
ArrayList<String> value = new ArrayList<String>();
context.withModelAttribute("list", value);
assertThat(template.output(context), is(""));
}
@Test
public void iterateOverMap() throws ParseException, CompileException, RenderException {
JtwigTemplate template =
new JtwigTemplate("{% for key, value in map %}{{ key }} = {{ value }}|{% endfor %}");
JtwigContext context = new JtwigContext();
LinkedHashMap<String, String> value = new LinkedHashMap<String, String>();
value.put("one", "1");
value.put("two", "2");
value.put("three", "3");
context.withModelAttribute("map", value);
assertThat(template.output(context), is("one = 1|two = 2|three = 3|"));
}
@Test
public void forLoopMustExposeTheLoopVariable()
throws ParseException, CompileException, RenderException {
JtwigTemplate template =
new JtwigTemplate(
"{% for item in list %}"
+ "{% if loop.first %}First {% elseif loop.last %}Last{% else %}I: {{ loop.index }} R: {{ loop.revindex }} {% endif %}"
+ "{% endfor %}");
JtwigContext context = new JtwigContext();
ArrayList<String> value = new ArrayList<String>();
value.add("a");
value.add("b");
value.add("c");
value.add("d");
value.add("e");
context.withModelAttribute("list", value);
assertThat(template.output(context), is("First I: 1 R: 3 I: 2 R: 2 I: 3 R: 1 Last"));
}