src/main/java/org/fest/assertions/internal/Files.java
public void assertExists(Description description, File actual) {
    assertNotNull(description, actual);
    if (!actual.exists()) {
      String format = "expecting resource in path:<%s> to exist";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual));
    }
  }
public void assertExists(Description description, File actual) {
    assertNotNull(description, actual);
    if (!actual.exists()) {
      String format = "expecting resource in path:<%s> to exist";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual));
    }
  }
Asserts that the <em>actual</em> {@link File} represents an existing file or directory.

@param description the description of the <em>actual</em> {@code File}.
@param actual the <em>actual</em> {@code File}.
@throws AssertionError if the <em>actual</em> {@code File} is {@code null}.
@throws AssertionError if the <em>actual</em> {@link File} represents a file or directory that does not exist.