graph.putEdgeValue(1, 2, "A");
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class, () -> graph.edgeValue(EndpointPair.unordered(1, 2)));
    assertThat(e).hasMessageThat().contains(ENDPOINTS_MISMATCH);
    e =
        assertThrows(
            IllegalArgumentException.class, () -> graph.edgeValue(EndpointPair.unordered(2, 1)));

  public void testCheckPositive_zeroInt() {
    assertThrows(IllegalArgumentException.class, () -> MathPreconditions.checkPositive("int", 0));
  }

  public void testCheckPositive_maxInt() {
    MathPreconditions.checkPositive("int", Integer.MAX_VALUE);
  }

  public void testCheckPositive_minInt() {
    assertThrows(
        IllegalArgumentException.class,
        () -> MathPreconditions.checkPositive("int", Integer.MIN_VALUE));

    addEdge(N1, N2, E12);
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class,
            () -> networkAsMutableNetwork.addEdge(N1, N2, EDGE_NOT_IN_GRAPH));
    assertThat(e).hasMessageThat().contains(ERROR_PARALLEL_EDGE);
    e =
        assertThrows(
            IllegalArgumentException.class,

  @Test fun ofRejectsNullChar() {
    assertFailsWith<IllegalArgumentException> {
      headersOf("User-Agent", "Square\u0000OkHttp")
    }
  }

  @Test fun ofMapThrowsOnEmptyName() {
    assertFailsWith<IllegalArgumentException> {
      mapOf("" to "OkHttp").toHeaders()
    }
  }

  @Test fun ofMapThrowsOnBlankName() {
    assertFailsWith<IllegalArgumentException> {
      mapOf(" " to "OkHttp").toHeaders()
    }
  }

    assertThrows(IllegalArgumentException.class, () -> range.gap(Range.closed(2, 3)));
  }

  public void testGap_invalidRangesWithInfinity() {
    assertThrows(IllegalArgumentException.class, () -> Range.atLeast(1).gap(Range.atLeast(2)));

    assertThrows(IllegalArgumentException.class, () -> Range.atLeast(2).gap(Range.atLeast(1)));

    graph.putEdgeValue(1, 2, "A");
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class,
            () -> graph.edgeValueOrDefault(EndpointPair.unordered(1, 2), "default"));
    assertThat(e).hasMessageThat().contains(ENDPOINTS_MISMATCH);
    e =
        assertThrows(
            IllegalArgumentException.class,

  public void testForUriStringBad() {
    assertThrows(IllegalArgumentException.class, () -> InetAddresses.forUriString(""));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("192.168.999.888"));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("www.google.com"));

    assertThrows(IllegalArgumentException.class, () -> InetAddresses.forUriString("[1:2e]"));

     * Constructor for ICUNormalizer.
     * @param transliteratorId The ID of the transliterator to use.
     * @throws IllegalArgumentException if transliteratorId is null or invalid
     */
    public ICUNormalizer(final String transliteratorId) {
        if (transliteratorId == null) {
            throw new IllegalArgumentException("transliteratorId must not be null");
        }
        try {

  public <T> void testWhere_incompatibleGenericArrayMapping() {
    assertThrows(
        IllegalArgumentException.class,
        () -> new TypeResolver().where(new TypeCapture<T[]>() {}.capture(), String.class));
  }

  public <T> void testWhere_incompatibleParameterizedTypeMapping() {
    assertThrows(
        IllegalArgumentException.class,
        () -> new TypeResolver().where(new TypeCapture<Iterable<T>>() {}.capture(), List.class));

    addEdge(N1, N2, E12);
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class,
            () -> networkAsMutableNetwork.addEdge(N1, N2, EDGE_NOT_IN_GRAPH));
    assertThat(e).hasMessageThat().contains(ERROR_PARALLEL_EDGE);
    e =
        assertThrows(
            IllegalArgumentException.class,