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package org.javacs;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import com.google.common.reflect.ClassPath;
import java.net.URI;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.util.Collections;
import org.junit.Test;
public class ClassesTest {
@Test
public void list() {
var jdk = Classes.jdkTopLevelClasses();
assertThat(jdk.classes(), hasItem("java.util.List"));
assertThat(jdk.load("java.util.List"), not(nullValue()));
var empty = Classes.classPathTopLevelClasses(Collections.emptySet());
assertThat(empty.classes(), not(hasItem("java.util.List")));
}
@Test
public void arrayList() {
var jdk = Classes.jdkTopLevelClasses();
assertThat(jdk.classes(), hasItem("java.util.ArrayList"));
assertThat(jdk.load("java.util.ArrayList"), not(nullValue()));
}
@Test
public void platformClassPath() throws Exception {
var fs = FileSystems.getFileSystem(URI.create("jrt:/"));
var path = fs.getPath("/");
Files.walk(path).forEach(p -> System.out.println(p));
}
@Test
public void loadMain() throws Exception {
var classes = ClassPath.from(this.getClass().getClassLoader());
var found = classes.getTopLevelClasses("org.javacs");
assertThat(found, hasItem(hasToString("org.javacs.Main")));
var main = found.stream().filter(c -> c.getName().equals("org.javacs.Main")).findFirst();
assertTrue(main.isPresent());
var load = main.get().load();
assertNotNull(load);
}
@Test
public void loadList() throws Exception {
var classes = ClassPath.from(ClassLoader.getPlatformClassLoader());
var found = classes.getTopLevelClasses("java.util");
assertThat(found, not(empty()));
assertThat(found, hasItem(hasToString("java.util.List")));
var list = found.stream().filter(c -> c.getName().equals("java.util.List")).findFirst();
assertTrue(list.isPresent());
var load = list.get().load();
assertNotNull(load);
}
void ancestors(ClassLoader classLoader) {
while (classLoader != null) {
System.out.println(classLoader.toString());
classLoader = classLoader.getParent();
}
}
@Test
public void printAncestors() throws Exception {
System.out.println("This:");
ancestors(this.getClass().getClassLoader());
System.out.println("List:");
ancestors(java.util.List.class.getClassLoader());
System.out.println("System:");
ancestors(ClassLoader.getSystemClassLoader());
System.out.println("Platform:");
ancestors(ClassLoader.getPlatformClassLoader());
}
}
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