AdditionOperatorTest.java

package com.hubspot.jinjava.el.ext;

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

import java.util.Collection;
import java.util.Map;

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

import com.hubspot.jinjava.Jinjava;
import com.hubspot.jinjava.interpret.JinjavaInterpreter;

@SuppressWarnings("unchecked")
public class AdditionOperatorTest {

  private JinjavaInterpreter interpreter;

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

  @Test
  public void itConcatsStrings() {
    assertThat(interpreter.resolveELExpression("'foo' + 'bar'", -1)).isEqualTo("foobar");
  }

  @Test
  public void itAddsNumbers() {
    assertThat(interpreter.resolveELExpression("1 + 2", -1)).isEqualTo(3L);
  }

  @Test
  public void itConcatsNumberWithString() {
    assertThat(interpreter.resolveELExpression("'1' + 2", -1)).isEqualTo("12");
    assertThat(interpreter.resolveELExpression("1 + '2'", -1)).isEqualTo("12");
  }

  @Test
  public void itCombinesTwoLists() {
    assertThat((Collection<Object>) interpreter.resolveELExpression("['foo', 'bar'] + ['other', 'one']", -1))
        .containsExactly("foo", "bar", "other", "one");
  }

  @Test
  public void itAddsToList() {
    assertThat((Collection<Object>) interpreter.resolveELExpression("['foo'] + 'bar'", -1)).containsExactly("foo", "bar");
  }

  @Test
  public void itCombinesTwoDicts() {
    assertThat((Map<Object, Object>) interpreter.resolveELExpression("{'k1':'v1'} + {'k2':'v2'}", -1))
        .containsOnly(entry("k1", "v1"), entry("k2", "v2"));
  }

}