@Test
public void cannot_load_a_class_file_not_in_parent() throws Exception {
// given
ClassLoader cl = ClassLoaders.inMemoryClassLoader().withParent(jdkClassLoader()).build();
cl.loadClass("java.lang.String");
try {
// when
cl.loadClass("org.mockito.Mockito");
fail("should have not found Mockito class");
} catch (ClassNotFoundException e) {
// then
assertThat(e.getMessage()).contains("org.mockito.Mockito");
}
}
@Test(expected = ClassNotFoundException.class)
public void isolated_class_loader_cannot_load_classes_when_no_given_prefix() throws Exception {
// given
ClassLoader cl = isolatedClassLoader().build();
// when
cl.loadClass("org.mockito.Mockito");
// then raises CNFE
}
@Test(expected = ClassNotFoundException.class)
public void excluding_class_loader_cannot_load_classes_when_no_correct_source_url_set()
throws Exception {
// given
ClassLoader cl = excludingClassLoader().withCodeSourceUrlOf(this.getClass()).build();
// when
cl.loadClass("org.mockito.Mockito");
// then class CNFE
}
@Test
public void excluding_class_loader_can_load_classes_when_correct_source_url_set()
throws Exception {
// given
ClassLoader cl = excludingClassLoader().withCodeSourceUrlOf(Mockito.class).build();
// when
cl.loadClass("org.mockito.Mockito");
// then class successfully loaded
}
@Test
public void excluding_class_loader_cannot_load_class_when_excluded_prefix_match_class_to_load()
throws Exception {
// given
ClassLoader cl =
excludingClassLoader()
.withCodeSourceUrlOf(Mockito.class)
.without("org.mockito.BDDMockito")
.build();
cl.loadClass("org.mockito.Mockito");
// when
try {
cl.loadClass("org.mockito.BDDMockito");
fail("should have raise a ClassNotFoundException");
} catch (ClassNotFoundException e) {
assertThat(e.getMessage()).contains("org.mockito.BDDMockito");
}
// then class successfully loaded
}
@Test
public void isolated_class_loader_cannot_load_classes_if_no_code_source_path() throws Exception {
// given
ClassLoader cl = isolatedClassLoader().withPrivateCopyOf(CLASS_NAME_USING_INTERFACE).build();
// when
try {
cl.loadClass(CLASS_NAME_USING_INTERFACE);
fail();
} catch (ClassNotFoundException e) {
// then
assertThat(e.getMessage()).contains(CLASS_NAME_USING_INTERFACE);
}
}
@Test
public void can_load_a_class_in_memory_from_bytes() throws Exception {
// given
ClassLoader cl =
ClassLoaders.inMemoryClassLoader()
.withClassDefinition("yop.Dude", SimpleClassGenerator.makeMarkerInterface("yop.Dude"))
.build();
// when
Class<?> aClass = cl.loadClass("yop.Dude");
// then
assertThat(aClass).isNotNull();
assertThat(aClass.getClassLoader()).isEqualTo(cl);
assertThat(aClass.getName()).isEqualTo("yop.Dude");
}
@Test
public void can_not_load_a_class_not_previously_registered_in_builder() throws Exception {
// given
ClassLoader cl =
ClassLoaders.inMemoryClassLoader()
.withClassDefinition("yop.Dude", SimpleClassGenerator.makeMarkerInterface("yop.Dude"))
.build();
// when
try {
cl.loadClass("not.Defined");
fail();
} catch (ClassNotFoundException e) {
// then
assertThat(e.getMessage()).contains("not.Defined");
}
}
@Test
public void isolated_class_loader_cannot_load_classes_not_matching_the_prefix() throws Exception {
// given
ClassLoader cl =
isolatedClassLoader()
.withCurrentCodeSourceUrls()
.withPrivateCopyOf(CLASS_NAME_USING_INTERFACE)
.build();
// when
try {
cl.loadClass(CLASS_NAME_USING_INTERFACE);
fail();
} catch (NoClassDefFoundError e) {
// then
assertThat(e.getMessage()).contains("org/mockitoutil/ClassLoadersTest$Interface1");
}
}
@Test
public void isolated_class_loader_can_load_all_classes_unless_all_classes_mathch_the_prefixes()
throws Exception {
// given
ClassLoader cl =
isolatedClassLoader()
.withCurrentCodeSourceUrls()
.withPrivateCopyOf(CLASS_NAME_USING_INTERFACE)
.withPrivateCopyOf(INTERFACE_NAME)
.build();
// when
Class<?> aClass = cl.loadClass(CLASS_NAME_USING_INTERFACE);
// then
assertThat(aClass).isNotNull();
assertThat(aClass.getClassLoader()).isEqualTo(cl);
assertThat(aClass.getInterfaces()[0].getClassLoader()).isEqualTo(cl);
}