How to use isolatedClassLoader method of org.mockitoutil.ClassLoaders class

Best Mockito code snippet using org.mockitoutil.ClassLoaders.isolatedClassLoader

Source:ClassLoadersTest.java Github

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...10import static org.assertj.core.api.Assertions.assertThat;11import static org.junit.Assert.fail;12import static org.mockitoutil.ClassLoaders.currentClassLoader;13import static org.mockitoutil.ClassLoaders.excludingClassLoader;14import static org.mockitoutil.ClassLoaders.isolatedClassLoader;15import static org.mockitoutil.ClassLoaders.jdkClassLoader;16public class ClassLoadersTest {17 public static final String CLASS_NAME_DEPENDING_ON_INTERFACE = "org.mockitoutil.ClassLoadersTest$ClassUsingInterface1";18 public static final String INTERFACE_NAME = "org.mockitoutil.ClassLoadersTest$Interface1";19 @Test(expected = ClassNotFoundException.class)20 public void isolated_class_loader_cannot_load_classes_when_no_given_prefix() throws Exception {21 // given22 ClassLoader cl = isolatedClassLoader().build();23 // when24 cl.loadClass("org.mockito.Mockito");25 // then raises CNFE26 }27 @Test28 public void isolated_class_loader_cannot_load_classes_if_no_code_source_path() throws Exception {29 // given30 ClassLoader cl = isolatedClassLoader()31 .withPrivateCopyOf(CLASS_NAME_DEPENDING_ON_INTERFACE)32 .build();33 // when34 try {35 cl.loadClass(CLASS_NAME_DEPENDING_ON_INTERFACE);36 fail();37 } catch (ClassNotFoundException e) {38 // then39 assertThat(e).hasMessageContaining(CLASS_NAME_DEPENDING_ON_INTERFACE);40 }41 }42 @Test43 public void isolated_class_loader_cannot_load_classes_if_dependent_classes_do_not_match_the_prefixes() throws Exception {44 // given45 ClassLoader cl = isolatedClassLoader()46 .withCurrentCodeSourceUrls()47 .withPrivateCopyOf(CLASS_NAME_DEPENDING_ON_INTERFACE)48 .build();49 // when50 try {51 cl.loadClass(CLASS_NAME_DEPENDING_ON_INTERFACE);52 fail();53 } catch (NoClassDefFoundError e) {54 // then55 assertThat(e).hasMessageContaining("org/mockitoutil/ClassLoadersTest$Interface1");56 }57 }58 @Test59 public void isolated_class_loader_can_load_classes_when_dependent_classes_are_matching_the_prefixes() throws Exception {60 // given61 ClassLoader cl = isolatedClassLoader()62 .withCurrentCodeSourceUrls()63 .withPrivateCopyOf(CLASS_NAME_DEPENDING_ON_INTERFACE)64 .withPrivateCopyOf(INTERFACE_NAME)65 .build();66 // when67 Class<?> aClass = cl.loadClass(CLASS_NAME_DEPENDING_ON_INTERFACE);68 // then69 assertThat(aClass).isNotNull();70 assertThat(aClass.getClassLoader()).isEqualTo(cl);71 assertThat(aClass.getInterfaces()[0].getClassLoader()).isEqualTo(cl);72 }73 @Test74 public void isolated_class_loader_can_load_classes_isolated_classes_in_isolation() throws Exception {75 // given76 ClassLoader cl = isolatedClassLoader()77 .withCurrentCodeSourceUrls()78 .withPrivateCopyOf(ClassLoadersTest.class.getPackage().getName())79 .build();80 // when81 Class<?> aClass = cl.loadClass(AClass.class.getName());82 // then83 assertThat(aClass).isNotNull();84 assertThat(aClass).isNotSameAs(AClass.class);85 assertThat(aClass.getClassLoader()).isEqualTo(cl);86 }87 @Test88 public void isolated_class_loader_cannot_load_classes_if_prefix_excluded() throws Exception {89 // given90 ClassLoader cl = isolatedClassLoader()91 .withCurrentCodeSourceUrls()92 .withPrivateCopyOf(ClassLoadersTest.class.getPackage().getName())93 .without(AClass.class.getName())94 .build();95 // when96 try {97 cl.loadClass(AClass.class.getName());98 fail();99 } catch (ClassNotFoundException e) {100 // then101 assertThat(e).hasMessageContaining("org.mockitoutil")102 .hasMessageContaining(AClass.class.getName());103 }104 }105 @Test106 public void isolated_class_loader_has_no_parent() throws Exception {107 ClassLoader cl = isolatedClassLoader()108 .withCurrentCodeSourceUrls()109 .withPrivateCopyOf(CLASS_NAME_DEPENDING_ON_INTERFACE)110 .withPrivateCopyOf(INTERFACE_NAME)111 .build();112 assertThat(cl.getParent()).isNull();113 }114 @Test(expected = ClassNotFoundException.class)115 public void excluding_class_loader_cannot_load_classes_when_no_correct_source_url_set() throws Exception {116 // given117 ClassLoader cl = excludingClassLoader()118 .withCodeSourceUrlOf(this.getClass())119 .build();120 // when121 cl.loadClass("org.mockito.Mockito");122 // then class CNFE123 }124 @Test125 public void excluding_class_loader_can_load_classes_when_correct_source_url_set() throws Exception {126 // given127 ClassLoader cl = excludingClassLoader()128 .withCodeSourceUrlOf(Mockito.class)129 .build();130 // when131 cl.loadClass("org.mockito.Mockito");132 // then class successfully loaded133 }134 @Test135 public void excluding_class_loader_cannot_load_class_when_excluded_prefix_match_class_to_load() throws Exception {136 // given137 ClassLoader cl = excludingClassLoader()138 .withCodeSourceUrlOf(Mockito.class)139 .without("org.mockito.BDDMockito")140 .build();141 cl.loadClass("org.mockito.Mockito");142 // when143 try {144 cl.loadClass("org.mockito.BDDMockito");145 fail("should have raise a ClassNotFoundException");146 } catch (ClassNotFoundException e) {147 assertThat(e.getMessage()).contains("org.mockito.BDDMockito");148 }149 // then class successfully loaded150 }151 @Test152 public void can_not_load_a_class_not_previously_registered_in_builder() throws Exception {153 // given154 ClassLoader cl = ClassLoaders155 .inMemoryClassLoader()156 .withClassDefinition("yop.Dude", SimpleClassGenerator.makeMarkerInterface("yop.Dude"))157 .build();158 // when159 try {160 cl.loadClass("not.Defined");161 fail();162 } catch (ClassNotFoundException e) {163 // then164 assertThat(e.getMessage()).contains("not.Defined");165 }166 }167 @Test168 public void can_load_a_class_in_memory_from_bytes() throws Exception {169 // given170 ClassLoader cl = ClassLoaders171 .inMemoryClassLoader()172 .withClassDefinition("yop.Dude", SimpleClassGenerator.makeMarkerInterface("yop.Dude"))173 .build();174 // when175 Class<?> aClass = cl.loadClass("yop.Dude");176 // then177 assertThat(aClass).isNotNull();178 assertThat(aClass.getClassLoader()).isEqualTo(cl);179 assertThat(aClass.getName()).isEqualTo("yop.Dude");180 }181 @Test182 public void cannot_load_a_class_file_not_in_parent() throws Exception {183 // given184 ClassLoader cl = ClassLoaders185 .inMemoryClassLoader()186 .withParent(jdkClassLoader())187 .build();188 cl.loadClass("java.lang.String");189 try {190 // when191 cl.loadClass("org.mockito.Mockito");192 fail("should have not found Mockito class");193 } catch (ClassNotFoundException e) {194 // then195 assertThat(e.getMessage()).contains("org.mockito.Mockito");196 }197 }198 @Test199 public void can_list_all_classes_reachable_in_a_classloader() throws Exception {200 ClassLoader classLoader = ClassLoaders.inMemoryClassLoader()201 .withParent(jdkClassLoader())202 .withClassDefinition("a.A", SimpleClassGenerator.makeMarkerInterface("a.A"))203 .withClassDefinition("a.b.B", SimpleClassGenerator.makeMarkerInterface("a.b.B"))204 .withClassDefinition("c.C", SimpleClassGenerator.makeMarkerInterface("c.C"))205// .withCodeSourceUrlOf(ClassLoaders.class)206 .build();207 assertThat(ClassLoaders.in(classLoader).listOwnedClasses()).containsOnly("a.A", "a.b.B", "c.C");208 assertThat(ClassLoaders.in(classLoader).omit("b", "c").listOwnedClasses()).containsOnly("a.A");209 }210 @Test211 public void return_bootstrap_classloader() throws Exception {212 assertThat(jdkClassLoader()).isNotEqualTo(Mockito.class.getClassLoader());213 assertThat(jdkClassLoader()).isNotEqualTo(ClassLoaders.class.getClassLoader());214 assertThat(jdkClassLoader()).isEqualTo(Number.class.getClassLoader());215 assertThat(jdkClassLoader()).isEqualTo(null);216 }217 @Test218 public void return_current_classloader() throws Exception {219 assertThat(currentClassLoader()).isEqualTo(this.getClass().getClassLoader());220 }221 @Test222 public void can_run_in_given_classloader() throws Exception {223 // given224 final ClassLoader cl = isolatedClassLoader()225 .withCurrentCodeSourceUrls()226 .withCodeSourceUrlOf(Assertions.class)227 .withPrivateCopyOf("org.assertj.core")228 .withPrivateCopyOf(ClassLoadersTest.class.getPackage().getName())229 .without(AClass.class.getName())230 .build();231 final AtomicBoolean executed = new AtomicBoolean(false);232 // when233 ClassLoaders.using(cl).execute(new Runnable() {234 @Override235 public void run() {236 assertThat(this.getClass().getClassLoader()).describedAs("runnable is reloaded in given classloader").isEqualTo(cl);237 assertThat(Thread.currentThread().getContextClassLoader()).describedAs("Thread context classloader is using given classloader").isEqualTo(cl);238 try {239 assertThat(Thread.currentThread()240 .getContextClassLoader()241 .loadClass("java.lang.String"))242 .describedAs("can load JDK type")243 .isNotNull();244 assertThat(Thread.currentThread()245 .getContextClassLoader()246 .loadClass("org.mockitoutil.ClassLoadersTest$ClassUsingInterface1"))247 .describedAs("can load classloader types")248 .isNotNull();249 } catch (ClassNotFoundException cnfe) {250 Assertions.fail("should not have raised a CNFE", cnfe);251 }252 executed.set(true);253 }254 });255 // then256 assertThat(executed.get()).isEqualTo(true);257 }258 @Test259 public void cannot_load_runnable_in_given_classloader_if_some_type_cant_be_loaded() throws Exception {260 // given261 final ClassLoader cl = isolatedClassLoader()262 .withCurrentCodeSourceUrls()263 .withPrivateCopyOf(ClassLoadersTest.class.getPackage().getName())264 .without(AClass.class.getName())265 .build();266 // when267 try {268 ClassLoaders.using(cl).execute(new Runnable() {269 @Override270 public void run() {271 AClass cant_be_found = new AClass();272 }273 });274 Assertions.fail("should have raised a ClassNotFoundException");275 } catch (IllegalStateException ise) {...

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isolatedClassLoader

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1 public void testIsolatedClassLoader() throws Exception {2 ClassLoader originalClassLoader = Thread.currentThread().getContextClassLoader();3 URLClassLoader isolatedClassLoader = ClassLoaders.isolatedClassLoader();4 Thread.currentThread().setContextClassLoader(isolatedClassLoader);5 Class<?> mockitoCore = isolatedClassLoader.loadClass("org.mockito.Mockito");6 Method method = mockitoCore.getMethod("mock", Class.class);7 Object mock = method.invoke(null, List.class);8 assertTrue(mock instanceof List);9 Thread.currentThread().setContextClassLoader(originalClassLoader);10 }11}

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isolatedClassLoader

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1import org.junit.Test;2import org.mockitoutil.ClassLoaders;3import static org.junit.Assert.assertTrue;4public class ClassLoadersTest {5 public void testIsolatedClassLoader() throws Exception {6 ClassLoader isolatedClassLoader = ClassLoaders.isolatedClassLoader();7 Class<?> clazz = isolatedClassLoader.loadClass("java.lang.String");8 assertTrue(clazz.getClassLoader() == isolatedClassLoader);9 }10}11org.mockitoutil.ClassLoadersTest > testIsolatedClassLoader() PASSED

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isolatedClassLoader

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1public void test() throws Exception {2 File file = new File("C:/Users/username/Documents/");3 ClassUnderTest.method(file.getAbsolutePath());4 ClassUnderTest.method("C:/Users/username/Documents/invalid.txt");5}6java.io.FileNotFoundException: C:\Users\username\Documents\invalid.txt (The system cannot find the file specified)

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