UnlessTagTest.java

package com.hubspot.jinjava.lib.tag;

import static org.assertj.core.api.Assertions.assertThat;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

import org.junit.Before;
import org.junit.Test;

import com.google.common.base.Throwables;
import com.google.common.io.Resources;
import com.hubspot.jinjava.Jinjava;
import com.hubspot.jinjava.interpret.Context;
import com.hubspot.jinjava.interpret.JinjavaInterpreter;
import com.hubspot.jinjava.tree.TagNode;
import com.hubspot.jinjava.tree.TreeParser;

public class UnlessTagTest {

  JinjavaInterpreter interpreter;
  UnlessTag tag;

  Context context;

  @Before
  public void setup() {
    interpreter = new Jinjava().newInterpreter();
    context = interpreter.getContext();

    tag = new UnlessTag();
  }

  @Test
  public void itEvaluatesChildrenWhenExpressionIsFalse() throws Exception {
    context.put("foo", "bar");
    TagNode n = fixture("unless");
    assertThat(tag.interpret(n, interpreter).trim()).isEqualTo("");
  }

  @Test
  public void itDoesntEvalChildrenWhenExprIsTrue() throws Exception {
    context.put("foo", null);
    TagNode n = fixture("unless");
    assertThat(tag.interpret(n, interpreter).trim()).isEqualTo("ifblock");
  }

  private TagNode fixture(String name) {
    try {
      return (TagNode) new TreeParser(interpreter, Resources.toString(
          Resources.getResource(String.format("tags/iftag/%s.jinja", name)), StandardCharsets.UTF_8))
          .buildTree().getChildren().getFirst();
    } catch (IOException e) {
      throw Throwables.propagate(e);
    }
  }

}