diff --git a/infer/tests/codetoanalyze/java/nullsafe-default/SwitchCase.java b/infer/tests/codetoanalyze/java/nullsafe-default/SwitchCase.java new file mode 100644 index 000000000..1e6c46ba4 --- /dev/null +++ b/infer/tests/codetoanalyze/java/nullsafe-default/SwitchCase.java @@ -0,0 +1,66 @@ +/* + * Copyright (c) Facebook, Inc. and its affiliates. + * + * This source code is licensed under the MIT license found in the + * LICENSE file in the root directory of this source tree. + */ + +package codetoanalyze.java.nullsafe_default; + +import javax.annotation.Nullable; + +public class SwitchCase { + public String switchOnNullIsBad() { + Color color = null; + switch (color) { + case BLACK: + return "BLACK"; + case WHITE: + return "WHITE"; + default: + // the default case will never be called. + // instead, an NPE will be thrown. + return "DEFAULT"; + } + } + + public String switchOnNullableIsBad() { + Color color = getNullableColor(); + switch (color) { + case BLACK: + return "BLACK"; + case WHITE: + return "WHITE"; + default: + // in case `color` is null, this WON'T BE called. + // instead, an NPE will be thrown + return "DEFAULT"; + } + } + + public String switchOnNonNullableIsOK() { + Color color = getNonNullableColor(); + switch (color) { + case BLACK: + return "BLACK"; + case WHITE: + return "WHITE"; + default: + // default case won't happen, but this is fine + return "DEFAULT"; + } + } + + private @Nullable Color getNullableColor() { + return Color.BLACK; + } + + private Color getNonNullableColor() { + return Color.BLACK; + } +} + +enum Color { + BLACK, + WHITE; +} diff --git a/infer/tests/codetoanalyze/java/nullsafe-default/issues.exp b/infer/tests/codetoanalyze/java/nullsafe-default/issues.exp index a502aa75e..e6bf0eb94 100644 --- a/infer/tests/codetoanalyze/java/nullsafe-default/issues.exp +++ b/infer/tests/codetoanalyze/java/nullsafe-default/issues.exp @@ -243,4 +243,7 @@ codetoanalyze/java/nullsafe-default/StrictModeForThirdParty.java, codetoanalyze. codetoanalyze/java/nullsafe-default/StrictModeForThirdParty.java, codetoanalyze.java.nullsafe_default.StrictModeForThirdParty.dereferenceUnspecifiedIsBAD():void, 0, ERADICATE_UNVETTED_THIRD_PARTY_IN_STRICT, no_bucket, WARNING, [`ThirdPartyTestClass.returnUnspecified()`: `@NullsafeStrict` mode prohibits using values coming from not vetted third party methods without a check. Result of this call is used at line 41. Either add a local check for null or assertion, or add the correct signature to nullsafe-default/third-party-signatures/some.test.pckg.sig.] codetoanalyze/java/nullsafe-default/StrictModeForThirdParty.java, codetoanalyze.java.nullsafe_default.StrictModeForThirdParty.passingNullableParamToUnspecifiedIsBAD():void, 0, ERADICATE_PARAMETER_NOT_NULLABLE, no_bucket, WARNING, [Third-party `ThirdPartyTestClass.paramUnspecified(...)` is missing a signature that would allow passing a nullable to param #1(`param`). Actual argument `getNullable()` is nullable. Consider adding the correct signature of `ThirdPartyTestClass.paramUnspecified(...)` to nullsafe-default/third-party-signatures/some.test.pckg.sig.] codetoanalyze/java/nullsafe-default/StrictModeForThirdParty.java, codetoanalyze.java.nullsafe_default.StrictModeForThirdParty.passingNullableToParamSpecifiedAsNonnullIsBAD():void, 0, ERADICATE_PARAMETER_NOT_NULLABLE, no_bucket, WARNING, [`ThirdPartyTestClass.secondParamSpecifiedAsNonnull(...)`: parameter #2(`specifiedAsNonnull`) is declared non-nullable (see nullsafe-default/third-party-signatures/some.test.pckg.sig at line 3) but the argument `getNullable()` is nullable.] +codetoanalyze/java/nullsafe-default/SwitchCase.java, codetoanalyze.java.nullsafe_default.SwitchCase.getNullableColor():codetoanalyze.java.nullsafe_default.Color, 0, ERADICATE_RETURN_OVER_ANNOTATED, no_bucket, WARNING, [Method `getNullableColor()` is annotated with `@Nullable` but never returns null.] +codetoanalyze/java/nullsafe-default/SwitchCase.java, codetoanalyze.java.nullsafe_default.SwitchCase.switchOnNullIsBad():java.lang.String, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [NullPointerException will be thrown at this line! `color` is `null` and is dereferenced via calling `ordinal()`: null constant at line 14] +codetoanalyze/java/nullsafe-default/SwitchCase.java, codetoanalyze.java.nullsafe_default.SwitchCase.switchOnNullableIsBad():java.lang.String, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [`color` is nullable and is not locally checked for null when calling `ordinal()`: call to getNullableColor() at line 28] codetoanalyze/java/nullsafe-default/third-party-test-code/some/test/pckg/ThirdPartyTestClass.java, some.test.pckg.ThirdPartyTestClass.returnSpecifiedAsNullable():java.lang.String, 0, ERADICATE_RETURN_OVER_ANNOTATED, no_bucket, WARNING, [Method `returnSpecifiedAsNullable()` is annotated with `@Nullable` but never returns null.]