ComparatorAssertionsTest.java

package com.github.liblevenshtein.assertion;

import java.util.Comparator;

import org.testng.annotations.Test;

import static com.github.liblevenshtein.assertion.ComparatorAssertions.assertThat;

public class ComparatorAssertionsTest {

  private final Comparator<Integer> comparator = (i, j) -> Integer.compare(i, j);

  @Test
  public void testEqualsTo() {
    assertThat(comparator).comparesEqualTo(1, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testEqualsToAgainstLessThan() {
    assertThat(comparator).comparesEqualTo(1, 2);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testEqualsToAgainstGreaterThan() {
    assertThat(comparator).comparesEqualTo(2, 1);
  }

  @Test
  public void testGreaterThan() {
    assertThat(comparator).comparesGreaterThan(2, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testGreaterThanAgainstEqualsTo() {
    assertThat(comparator).comparesGreaterThan(1, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testGreaterThanAgainstLessThan() {
    assertThat(comparator).comparesGreaterThan(1, 2);
  }

  @Test
  public void testLessThan() {
    assertThat(comparator).comparesLessThan(1, 2);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testLessThanAgainstEqualsTo() {
    assertThat(comparator).comparesLessThan(1, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testLessThanAgainstGreaterThan() {
    assertThat(comparator).comparesLessThan(2, 1);
  }

  @Test
  public void testGreaterThanOrEqualTo() {
    assertThat(comparator)
      .comparesGreaterThanOrEqualTo(2, 1)
      .comparesGreaterThanOrEqualTo(1, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testGreaterThanOrEqualToAgainstLessThan() {
    assertThat(comparator).comparesGreaterThanOrEqualTo(1, 2);
  }

  @Test
  public void testLessThanOrEqualTo() {
    assertThat(comparator)
      .comparesLessThanOrEqualTo(1, 2)
      .comparesLessThanOrEqualTo(1, 1);
  }

  @Test(expectedExceptions = AssertionError.class)
  public void testLessThanOrEqualToAgainstGreaterThan() {
    assertThat(comparator).comparesLessThanOrEqualTo(2, 1);
  }
}