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How to use internalSingleElement method of org.assertj.core.api.AbstractIterableAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractIterableAssert.internalSingleElement

Source:AbstractIterableAssert.java

...2784   * @see #singleElement(InstanceOfAssertFactory)2785   */2786  @CheckReturnValue2787  public ELEMENT_ASSERT singleElement() {2788    return internalSingleElement();2789  }2790  /**2791   * Verifies that the {@link Iterable} under test contains a single element and allows to perform assertions on that element.<br>2792   * The assertions are strongly typed according to the given {@link AssertFactory} parameter.2793   * <p>2794   * This is a shorthand for <code>hasSize(1).first(assertFactory)</code>.2795   * <p>2796   * Example: use of {@code String} assertions after {@code singleElement(as(STRING)}2797   * <pre><code class='java'> import static org.assertj.core.api.InstanceOfAssertFactories.STRING;2798   * import static org.assertj.core.api.InstanceOfAssertFactories.INTEGER;2799   * import static org.assertj.core.api.Assertions.as; // syntactic sugar2800   *2801   * List&lt;String&gt; babySimpsons = list("Maggie");2802   *2803   * // assertion succeeds2804   * assertThat(babySimpsons).singleElement(as(STRING))2805   *                         .startsWith("Mag");2806   *2807   * // assertion fails2808   * assertThat(babySimpsons).singleElement(as(STRING))2809   *                         .startsWith("Lis");2810   *2811   * // assertion fails because of wrong factory type2812   * assertThat(babySimpsons).singleElement(as(INTEGER))2813   *                         .isZero();2814   *2815   * // assertion fails because list contains no elements2816   * assertThat(emptyList()).singleElement(as(STRING));2817   *2818   * // assertion fails because list contains more than one element2819   * List&lt;String&gt; simpsons = list("Homer", "Marge", "Lisa", "Bart", "Maggie");2820   * assertThat(simpsons).singleElement(as(STRING));</code></pre>2821   *2822   * @param <ASSERT>      the type of the resulting {@code Assert}2823   * @param assertFactory the factory which verifies the type and creates the new {@code Assert}2824   * @return a new narrowed {@link Assert} instance for assertions chaining on the single element2825   * @throws AssertionError if the actual {@link Iterable} does not contain exactly one element.2826   * @throws NullPointerException if the given factory is {@code null}.2827   * @since 3.17.02828   */2829  @CheckReturnValue2830  public <ASSERT extends AbstractAssert<?, ?>> ASSERT singleElement(InstanceOfAssertFactory<?, ASSERT> assertFactory) {2831    return internalSingleElement().asInstanceOf(assertFactory);2832  }2833  private ELEMENT_ASSERT internalSingleElement() {2834    iterables.assertHasSize(info, actual, 1);2835    return internalFirst();2836  }2837  protected abstract ELEMENT_ASSERT toAssert(ELEMENT value, String description);2838  protected String navigationDescription(String propertyName) {2839    String text = descriptionText();2840    if (Strings.isNullOrEmpty(text)) {2841      text = removeAssert(this.getClass().getSimpleName());2842    }2843    return text + " " + propertyName;2844  }2845  private static String removeAssert(String text) {2846    return text.endsWith(ASSERT) ? text.substring(0, text.length() - ASSERT.length()) : text;2847  }...

internalSingleElement

Using AI Code Generation

1import org.assertj.core.api.Assertions.assertThat;2import java.util.ArrayList;3import java.util.List;4public class AssertJExample {5    public static void main(String[] args) {6        List<String> list = new ArrayList<>();7        list.add("one");8        list.add("two");9        list.add("three");10        list.add("four");11        list.add("five");12        assertThat(list).hasSize(5).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");13        assertThat(list).containsOnlyOnce("one", "two", "three", "four", "five");14        assertThat(list).containsExactly("one", "two", "three", "four", "five");15        assertThat(list).containsExactlyInAnyOrder("five", "three", "four", "one", "two");16        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");17        assertThat(list).containsOnly("one", "two", "three", "four", "five");18        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");19        assertThat(list).containsOnly("one", "two", "three", "four", "five");20        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");21        assertThat(list).containsOnly("one", "two", "three", "four", "five");22        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");23        assertThat(list).containsOnly("one", "two", "three", "four", "five");24        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");25        assertThat(list).containsOnly("one", "two", "three", "four", "five");26        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("six", "seven");27        assertThat(list).containsOnly("one", "two", "three", "four", "five");28        assertThat(list).contains("one", "two", "three", "four", "five").doesNotContain("

internalSingleElement

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import static org.assertj.core.api.Assertions.*;3import java.util.Arrays;4public class InternalSingleElementTest {5    public void testInternalSingleElement() {6        assertThat(Arrays.asList(1, 2, 3)).doesNotHave(internalSingleElement());7        assertThat(Arrays.asList(1)).has(internalSingleElement());8    }9}

internalSingleElement

Using AI Code Generation

1import org.assertj.core.api.Assertions.assertThat2import org.junit.jupiter.api.Test3class AssertJTest {4    fun test() {5        assertThat(listOf("a", "b", "c")).internalSingleElement()6    }7}8import org.assertj.core.api.Assertions.assertThat9import org.junit.jupiter.api.Test10class AssertJTest {11    fun test() {12        assertThat(listOf("a", "b", "c")).internalSingleElement("a")13    }14}

internalSingleElement

Using AI Code Generation

1import org.assertj.core.api.Assertions2import org.junit.Test3class AssertJIterableAssert {4    fun test() {5        Assertions.assertThat(listOf(1, 2, 3, 4, 5)).internalSingleElement { it > 2 }6    }7}

internalSingleElement

Using AI Code Generation

1import org.assertj.core.api.Assertions.*2import org.assertj.core.api.Assertions3import org.assertj.core.api.AbstractIterableAssert4import org.assertj.core.api.AbstractListAssert5import org.assertj.core.api.AbstractAssert6import org.assertj.core.api.AbstractObjectAssert7import org.assertj.core.api.AbstractCharSequenceAssert8import org.assertj.core.api.AbstractComparableAssert9import org.assertj.core.api.AbstractIntegerAssert10import org.assertj.core.api.AbstractDoubleAssert11import org.assertj.core.api.AbstractLongAssert12import org.assertj.core.api.AbstractBooleanAssert13import org.assertj.core.api.AbstractByteArrayAssert14import org.assertj.core.api.AbstractShortArrayAssert15import org.assertj.core.api.AbstractIntArrayAssert16import org.assertj.core.api.AbstractLongArrayAssert17import org.assertj.core.api.AbstractDoubleArrayAssert18import org.assertj.core.api.AbstractFloatArrayAssert19import org.assertj.core.api.AbstractBooleanArrayAssert20import org.assertj.core.api.AbstractObjectArrayAssert21import org.assertj.core.api.AbstractCharSequenceAssert22import org.assertj.core.api.AbstractThrowableAssert23import o

internalSingleElement

Using AI Code Generation

1import org.assertj.core.api.AbstractIterableAssert2import org.assertj.core.api.Assertions.assertThat3AbstractIterableAssert<?,?> assert = (AbstractIterableAssert<?,?>) assertThat(list)4assert.internalSingleElement().isEqualTo(1)5assertThat(list2).internalSingleElement().isEqualTo('a')6assert.internalSingleElement().isNotEqualTo(2)7assertThat(list2).internalSingleElement().isNotEqualTo('b')8assert.internalSingleElement().isGreaterThan(0)9assertThat(list2).internalSingleElement().isGreaterThan('a')10assert.internalSingleElement().isGreaterThanOrEqualTo(1)11assertThat(list2).internalSingleElement().isGreaterThanOrEqualTo('a')12assert.internalSingleElement().isLessThan(2)13assertThat(list2).internalSingleElement().isLessThan('b')14assert.internalSingleElement().isLessThanOrEqualTo(1)15assertThat(list2).internalSingleElement().isLessThanOrEqualTo('a')

internalSingleElement

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.IterableAssert.contains;4import static org.hamcrest.Matchers.containsString;5public class SingleElement {6    public static void main(String[] args) {7        String[] strings = {"a", "b", "c"};8        assertThat(strings).contains(containsString("a"));9    }10}

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