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Enforce Strict Interpretation Of Type Use Annotation Locations Outsid…
…e of JSpecify mode (#1010) Currently, outside of JSpecify, both top-level and element annotations are treated the same, i.e., considered as top-level annotations. This changes the default behavior by ignoring annotations on elements and adds a flag to revert back to legacy behavior. **Example:** ``` @nullable Object[] foo1 = null; Object @nullable[] foo2 = null; ``` **Current Behavior:** Both assignments are fine **New Behavior:** The first assignment raises an error since annotations on elements are ignored altogether and **_NOT_** treated as top-level annotations. Fixes #1007 --------- Co-authored-by: Manu Sridharan <msridhar@gmail.com>
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179 changes: 179 additions & 0 deletions
179
nullaway/src/test/java/com/uber/nullaway/ArrayTests.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,179 @@ | ||
| /* | ||
| * Copyright (c) 2024 Uber Technologies, Inc. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
|
|
||
| package com.uber.nullaway; | ||
|
|
||
| import com.google.errorprone.CompilationTestHelper; | ||
| import java.util.Arrays; | ||
| import org.junit.Test; | ||
| import org.junit.runner.RunWith; | ||
| import org.junit.runners.JUnit4; | ||
|
|
||
| @RunWith(JUnit4.class) | ||
| public class ArrayTests extends NullAwayTestsBase { | ||
| @Test | ||
| public void arrayDeclarationAnnotation() { | ||
| defaultCompilationHelper | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "import javax.annotation.Nullable;", | ||
| "class Test {", | ||
| " static @Nullable String [] fizz = {\"1\"};", | ||
| " static Object o1 = new Object();", | ||
| " static void foo() {", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " o1 = fizz;", | ||
| " // BUG: Diagnostic contains: dereferenced expression fizz is @Nullable", | ||
| " o1 = fizz.length;", | ||
| " }", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
||
| @Test | ||
| public void arrayLegacyDeclarationAnnotation() { | ||
| makeLegacyModeHelper() | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "import javax.annotation.Nullable;", | ||
| "class Test {", | ||
| " static @Nullable String [] fizz = {\"1\"};", | ||
| " static Object o1 = new Object();", | ||
| " static void foo() {", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " o1 = fizz;", | ||
| " // BUG: Diagnostic contains: dereferenced expression fizz is @Nullable", | ||
| " o1 = fizz.length;", | ||
| " }", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
||
| @Test | ||
| public void typeUseLegacyAnnotationOnArray() { | ||
| makeLegacyModeHelper() | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "import org.jspecify.annotations.Nullable;", | ||
| "class Test {", | ||
| " // ok only for backwards compat", | ||
| " @Nullable Object[] foo1 = null;", | ||
| " // ok according to spec", | ||
| " Object @Nullable[] foo2 = null;", | ||
| " // ok, but elements are not treated as @Nullable outside of JSpecify mode", | ||
| " @Nullable Object @Nullable[] foo3 = null;", | ||
| " // ok only for backwards compat", | ||
| " @Nullable Object [][] foo4 = null;", | ||
| " // ok according to spec", | ||
| " Object @Nullable [][] foo5 = null;", | ||
| " // ok, but @Nullable applies to first array dimension not the elements or the array ref", | ||
| " Object [] @Nullable [] foo6 = null;", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
||
| @Test | ||
| public void typeUseAnnotationOnArray() { | ||
| defaultCompilationHelper | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "import org.jspecify.annotations.Nullable;", | ||
| "class Test {", | ||
| " // @Nullable is not applied on top-level of array", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " @Nullable Object[] foo1 = null;", | ||
| " // ok according to spec", | ||
| " Object @Nullable[] foo2 = null;", | ||
| " // ok according to spec", | ||
| " @Nullable Object @Nullable [] foo3 = null;", | ||
| " // @Nullable is not applied on top-level of array", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " @Nullable Object [][] foo4 = null;", | ||
| " // ok according to spec", | ||
| " Object @Nullable [][] foo5 = null;", | ||
| " // @Nullable is not applied on top-level of array", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " Object [] @Nullable [] foo6 = null;", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
||
| @Test | ||
| public void typeUseAndDeclarationAnnotationOnArray() { | ||
| defaultCompilationHelper | ||
| .addSourceLines( | ||
| "Nullable.java", | ||
| "package com.uber;", | ||
| "import java.lang.annotation.ElementType;", | ||
| "import java.lang.annotation.Target;", | ||
| "@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE, ElementType.TYPE_USE})", | ||
| "public @interface Nullable {}") | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "class Test {", | ||
| " @Nullable Object[] foo1 = null;", | ||
| " Object @Nullable[] foo2 = null;", | ||
| " @Nullable Object @Nullable [] foo3 = null;", | ||
| " @Nullable Object [][] foo4 = null;", | ||
| " Object @Nullable [][] foo5 = null;", | ||
| " // BUG: Diagnostic contains: assigning @Nullable expression to @NonNull field", | ||
| " Object [] @Nullable [] foo6 = null;", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
||
| @Test | ||
| public void typeUseAndDeclarationLegacyAnnotationOnArray() { | ||
| makeLegacyModeHelper() | ||
| .addSourceLines( | ||
| "Nullable.java", | ||
| "package com.uber;", | ||
| "import java.lang.annotation.ElementType;", | ||
| "import java.lang.annotation.Target;", | ||
| "@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE, ElementType.TYPE_USE})", | ||
| "public @interface Nullable {}") | ||
| .addSourceLines( | ||
| "Test.java", | ||
| "package com.uber;", | ||
| "class Test {", | ||
| " @Nullable Object[] foo1 = null;", | ||
| " Object @Nullable[] foo2 = null;", | ||
| " @Nullable Object @Nullable [] foo3 = null;", | ||
| " @Nullable Object [][] foo4 = null;", | ||
| " Object @Nullable [][] foo5 = null;", | ||
| " Object [] @Nullable [] foo6 = null;", | ||
| "}") | ||
| .doTest(); | ||
| } | ||
|
|
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| private CompilationTestHelper makeLegacyModeHelper() { | ||
| return makeTestHelperWithArgs( | ||
| Arrays.asList( | ||
| "-XepOpt:NullAway:AnnotatedPackages=com.uber", | ||
| "-XepOpt:NullAway:LegacyAnnotationLocations=true")); | ||
| } | ||
| } |
47 changes: 47 additions & 0 deletions
47
nullaway/src/test/java/com/uber/nullaway/LegacyAndJspecifyModeTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package com.uber.nullaway; | ||
|
|
||
| import static com.uber.nullaway.ErrorProneCLIFlagsConfig.FL_JSPECIFY_MODE; | ||
| import static com.uber.nullaway.ErrorProneCLIFlagsConfig.FL_LEGACY_ANNOTATION_LOCATION; | ||
| import static org.hamcrest.CoreMatchers.instanceOf; | ||
| import static org.hamcrest.MatcherAssert.assertThat; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.jupiter.api.Assertions.assertThrows; | ||
|
|
||
| import com.google.errorprone.ErrorProneFlags; | ||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import org.junit.Test; | ||
|
|
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| public class LegacyAndJspecifyModeTest { | ||
|
|
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| private static final String ERROR = | ||
| "-XepOpt:" | ||
| + FL_LEGACY_ANNOTATION_LOCATION | ||
| + " cannot be used when " | ||
| + FL_JSPECIFY_MODE | ||
| + " is set "; | ||
|
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||
| @Test | ||
| public void testIllegalStateExceptionUsingReflection() throws Exception { | ||
| ErrorProneFlags flags = | ||
| ErrorProneFlags.builder() | ||
| .putFlag("NullAway:AnnotatedPackages", "com.uber") | ||
| .putFlag("NullAway:JSpecifyMode", "true") | ||
| .putFlag("NullAway:LegacyAnnotationLocations", "true") | ||
| .build(); | ||
|
|
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| Constructor<?> constructor = | ||
| ErrorProneCLIFlagsConfig.class.getDeclaredConstructor(ErrorProneFlags.class); | ||
| constructor.setAccessible(true); | ||
|
|
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| InvocationTargetException exception = | ||
| assertThrows( | ||
| InvocationTargetException.class, | ||
| () -> constructor.newInstance(flags), | ||
| "Expected IllegalStateException when both jspecifyMode and legacyAnnotationLocation are true."); | ||
|
|
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| Throwable cause = exception.getCause(); | ||
| assertThat(cause, instanceOf(IllegalStateException.class)); | ||
| assertEquals(cause.getMessage(), ERROR); | ||
| } | ||
| } |
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