while ((read = reader.read(buf)) != -1) {
      writer.write(buf, 0, read);
    }
    reader.close();
    writer.close();

    assertExpectedString(writer.toString());
  }

  public void testLines() throws IOException {
    try (Stream<String> lines = source.lines()) {
      assertExpectedLines(lines.collect(toImmutableList()));
    }
  }

  public void testCopyTo_appendable() throws IOException {

      }
      if (!cls.isInterface()) {
        classes.add(cls);
      }
    }
    return classes;
  }

  private static boolean hasTest(Class<?> testClass, Iterable<String> testNames) {
    for (String testName : testNames) {
      try {
        testClass.getMethod(testName);
        return true;
      } catch (NoSuchMethodException e) {
        continue;
      }
    }
    return false;
  }

  }

  public void testNull() throws Exception {
    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {
    // not bothering testing all variations, since we know they share implementations
    assertThat(Striped.lock(100).size()).isAtLeast(100);
    assertTrue(Striped.lock(256).size() == 256);

  }

  public void testNull() throws Exception {
    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {
    // not bothering testing all variations, since we know they share implementations
    assertThat(Striped.lock(100).size()).isAtLeast(100);
    assertTrue(Striped.lock(256).size() == 256);

      }
      if (!cls.isInterface()) {
        classes.add(cls);
      }
    }
    return classes;
  }

  private static boolean hasTest(Class<?> testClass, Iterable<String> testNames) {
    for (String testName : testNames) {
      try {
        testClass.getMethod(testName);
        return true;
      } catch (NoSuchMethodException e) {
        continue;
      }
    }
    return false;
  }

      writer.write(buf, 0, read);
    }
    reader.close();
    writer.close();

    assertTrue(source.wasStreamClosed());
    assertThat(writer.toString()).isEqualTo(STRING);
  }

  public void testLines() throws IOException {
    source = new TestCharSource(LINES);

    ImmutableList<String> lines;
    try (Stream<String> linesStream = source.lines()) {
      assertTrue(source.wasStreamOpened());

        // Test setting timestamp 1 hour ago
        long testTime = System.currentTimeMillis() - 3600000;
        file.setLastModified(testTime);

        long retrievedTime = file.lastModified();
        // Allow for reasonable precision differences
        assertTrue(Math.abs(retrievedTime - testTime) < 10000, "Set timestamp should be approximately correct");
    }

	{a: "abc\r\nabc", b: []string{"abc\r\n", "abc"}},
	{a: "abc\r\n", b: []string{"abc\r\n"}},
	{a: "\nabc", b: []string{"\n", "abc"}},
	{a: "\nabc\n\n", b: []string{"\n", "abc\n", "\n"}},
}

func TestLines(t *testing.T) {
	for _, s := range linesTests {
		result := sliceOfString(slices.Collect(Lines([]byte(s.a))))
		if !slices.Equal(result, s.b) {
			t.Errorf(`slices.Collect(Lines(%q)) = %q; want %q`, s.a, result, s.b)
		}