Boilerplate for asserting the contents of a module-info.java class.

ModuleInfoTest.java

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Exports;
import java.lang.module.ModuleDescriptor.Requires;
import java.nio.file.Path;

import static org.assertj.core.api.Assertions.assertThat;

class ModuleInfoTest {

  private ModuleDescriptor md;
  private File file;

  @BeforeEach
  void setUp() throws IOException {
    file = Path.of("target/classes/module-info.class").toFile();
    md = ModuleDescriptor.read(new FileInputStream(file));
  }

  @Test
  void shouldExport() {
    assertThat(md.exports().stream().map(Exports::source).toList()).containsExactly("EXPECTED_PATH");
  }

  @Test
  void shouldRequire() {
    assertThat(md.requires().stream().map(Requires::name).toList()).containsExactly("java.base", "EXPECTED_PATH");
  }

  @Test
  void shouldBeEmpty() {
    assertThat(md.opens()).isEmpty();
    assertThat(md.uses()).isEmpty();
    assertThat(md.provides()).isEmpty();
  }
}