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[nullsafe] Make test for @TrueOnNull and @FalseOnNull annotation specific about positive and negative cases

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Summary:
Let's consolidate "positive" and "negative" cased together by adding an example
of not annotated class as a source of "negative" cases.

Also join the case with modelled methods to the same class.

Reviewed By: jberdine

Differential Revision: D17284101

fbshipit-source-id: e15e60691
master
Mitya Lyubarskiy 5 years ago committed by Facebook Github Bot
parent 86140581d5
commit 7a09618dc4
2 changed files with 68 additions and 48 deletions
Show Stats Download Patch File Download Diff File

91
infer/tests/codetoanalyze/java/nullsafe-default/CustomAnnotations.java
Unescape View File

@ -16,54 +16,87 @@ import javax.annotation.Nullable;
public class CustomAnnotations {
static class MyTextUtils {
// Example of API that benefits from annotating with @TrueOnNull and @FalseOnNull
static class AnnotatedTextUtils {
@TrueOnNull
static boolean isEmpty(@Nullable java.lang.CharSequence s) {
static boolean isEmpty(@Nullable CharSequence s) {
return s == null || s.equals("");
}
@FalseOnNull
static boolean isNotEmpty(@Nullable java.lang.CharSequence s) {
static boolean isNotEmpty(@Nullable CharSequence s) {
return s != null && s.length() > 0;
}
}
class TestTextUtilsIsEmpty {
void textUtilsNotIsEmpty(@Nullable CharSequence s) {
if (!TextUtils.isEmpty(s)) {
s.toString(); // OK
// The same API, but not annotated
static class NotAnnotatedTextUtils {
static boolean isEmpty(@Nullable CharSequence s) {
return s == null || s.equals("");
}
static boolean isNotEmpty(@Nullable CharSequence s) {
return s != null && s.length() > 0;
}
}
void textUtilsIsEmpty(@Nullable CharSequence s) {
if (TextUtils.isEmpty(s)) {
s.toString(); // BAD
class Test {
void testTrueOnNull(@Nullable CharSequence s) {
// Explicitly annotated
if (!AnnotatedTextUtils.isEmpty(s)) {
s.toString(); // OK: if we are here, we know that s is not null
}
// Not annotated
if (!NotAnnotatedTextUtils.isEmpty(s)) {
s.toString(); // BAD: the typecker does not know s can not be null
}
void myTextUtilsNotIsEmpty(@Nullable CharSequence s) {
if (!MyTextUtils.isEmpty(s)) {
s.toString(); // OK
if (AnnotatedTextUtils.isEmpty(s)) {
s.toString(); // BAD: s can be null or an empty string
}
}
void myTextUtilsIsEmpty(@Nullable CharSequence s) {
if (MyTextUtils.isEmpty(s)) {
s.toString(); // BAD
void testFalseOnNull(@Nullable CharSequence s) {
// Explicitly annotated
if (AnnotatedTextUtils.isNotEmpty(s)) {
s.toString(); // OK: if we are here, we know that `s` is not null
}
// Not annotated
if (NotAnnotatedTextUtils.isNotEmpty(s)) {
s.toString(); // BAD: the typecker does not know `s` can not be null
}
void myTextUtilsIsNotEmpty(@Nullable CharSequence s) {
if (MyTextUtils.isNotEmpty(s)) {
s.toString(); // OK
if (!AnnotatedTextUtils.isNotEmpty(s)) {
s.toString(); // BAD: `s` can be null or an empty string
}
}
void testModelledTrueOnNull(String s) {
// TextUtils.isEmpty is modelled as TrueOnNull
if (!TextUtils.isEmpty(s)) {
s.toString(); // OK: if we are here, we know that `s` is not null
}
void myTextUtilsNotIsNotEmpty(@Nullable CharSequence s) {
if (!MyTextUtils.isNotEmpty(s)) {
s.toString(); // BAD
// Strings.isNullOrEmpty is modelled as TrueOnNull
if (!Strings.isNullOrEmpty(s)) {
s.toString(); // OK: if we are here, we know that `s` is not null
}
if (!NotAnnotatedTextUtils.isEmpty(s)) {
s.toString(); // BAD: the typechecker can not figure this out for not modelled class
}
}
void testEarlyReturn(@Nullable CharSequence s1, @Nullable CharSequence s2) {
if (AnnotatedTextUtils.isEmpty(s1) || NotAnnotatedTextUtils.isEmpty(s2)) {
return;
}
s1.toString(); // OK: if `s1` was null, we would no rech this point
s2.toString(); // BAD: typechecker can not figure this for not annotated class
}
}
@ -123,18 +156,4 @@ public class CustomAnnotations {
}
}
class TestModeledTrueOnNull {
void testIsEmptyOrNullOk(@Nullable String string) {
if (!Strings.isNullOrEmpty(string)) {
string.contains("Infer");
}
}
void testIsEmptyOrNullBad(@Nullable String string) {
if (Strings.isNullOrEmpty(string)) {
string.contains("Infer");
}
}
}
}

21
infer/tests/codetoanalyze/java/nullsafe-default/issues.exp
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@ -4,16 +4,17 @@ codetoanalyze/java/nullsafe-default/ButterKnife.java, codetoanalyze.java.nullsaf
codetoanalyze/java/nullsafe-default/ButterKnife.java, codetoanalyze.java.nullsafe_default.ButterKnife.dereferencingNullableIsBAD():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `ButterKnife.nullable` in the call to `length()` is nullable and is not locally checked for null. (Origin: field ButterKnife.nullable at line 33)]
codetoanalyze/java/nullsafe-default/ButterKnife.java, codetoanalyze.java.nullsafe_default.ButterKnife.passingToNullableForNullableIsBAD():void, 1, ERADICATE_PARAMETER_NOT_NULLABLE, no_bucket, WARNING, [`ButterKnife.f(...)` needs a non-null value in parameter 1 but argument `ButterKnife.nullable` can be null. (Origin: field ButterKnife.nullable at line 61)]
codetoanalyze/java/nullsafe-default/CapturedParam.java, codetoanalyze.java.nullsafe_default.CapturedParam.dereferencingNullableIsBAD(java.lang.Object):void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `parameter` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter parameter)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestModeledTrueOnNull.testIsEmptyOrNullBad(java.lang.String):void, 2, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `string` in the call to `contains(...)` is nullable and is not locally checked for null. (Origin: method parameter string)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m12Bad1():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m12(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m12(...) at line 114)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m12Bad2():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m12(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m12(...) at line 118)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m2Bad():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m2(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m2(...) at line 101)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.mBad():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m(...) at line 79)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestTextUtilsIsEmpty.myTextUtilsIsEmpty(java.lang.CharSequence):void, 2, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestTextUtilsIsEmpty.myTextUtilsNotIsNotEmpty(java.lang.CharSequence):void, 2, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestTextUtilsIsEmpty.textUtilsIsEmpty(java.lang.CharSequence):void, 1, ERADICATE_PARAMETER_NOT_NULLABLE, no_bucket, WARNING, [`TextUtils.isEmpty(...)` needs a non-null value in parameter 1 but argument `s` can be null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestTextUtilsIsEmpty.textUtilsIsEmpty(java.lang.CharSequence):void, 2, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestTextUtilsIsEmpty.textUtilsNotIsEmpty(java.lang.CharSequence):void, 1, ERADICATE_PARAMETER_NOT_NULLABLE, no_bucket, WARNING, [`TextUtils.isEmpty(...)` needs a non-null value in parameter 1 but argument `s` can be null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testEarlyReturn(java.lang.CharSequence,java.lang.CharSequence):void, 6, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s2` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s2)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testFalseOnNull(java.lang.CharSequence):void, 8, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testFalseOnNull(java.lang.CharSequence):void, 12, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testModelledTrueOnNull(java.lang.String):void, 2, ERADICATE_CONDITION_REDUNDANT, no_bucket, WARNING, [The condition s is always false according to the existing annotations.]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testModelledTrueOnNull(java.lang.String):void, 7, ERADICATE_CONDITION_REDUNDANT, no_bucket, WARNING, [The condition s is always false according to the existing annotations.]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testTrueOnNull(java.lang.CharSequence):void, 8, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$Test.testTrueOnNull(java.lang.CharSequence):void, 12, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `s` in the call to `toString()` is nullable and is not locally checked for null. (Origin: method parameter s)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m12Bad1():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m12(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m12(...) at line 147)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m12Bad2():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m12(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m12(...) at line 151)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.m2Bad():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m2(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m2(...) at line 134)]
codetoanalyze/java/nullsafe-default/CustomAnnotations.java, codetoanalyze.java.nullsafe_default.CustomAnnotations$TestPropagatesNullable.mBad():void, 1, ERADICATE_NULLABLE_DEREFERENCE, no_bucket, WARNING, [The value of `m(...)` in the call to `length()` is nullable and is not locally checked for null. (Origin: call to m(...) at line 112)]
codetoanalyze/java/nullsafe-default/FieldNotInitialized.java, codetoanalyze.java.nullsafe_default.FieldNotInitialized$InitCircular.<init>(codetoanalyze.java.nullsafe_default.FieldNotInitialized), 0, ERADICATE_FIELD_NOT_INITIALIZED, no_bucket, WARNING, [Field `FieldNotInitialized$InitCircular.bad` is not initialized in the constructor and is not declared `@Nullable`]
codetoanalyze/java/nullsafe-default/FieldNotInitialized.java, codetoanalyze.java.nullsafe_default.FieldNotInitialized$InitCircular.<init>(codetoanalyze.java.nullsafe_default.FieldNotInitialized), 0, ERADICATE_FIELD_NOT_INITIALIZED, no_bucket, WARNING, [Field `FieldNotInitialized$InitCircular.stillBad` is not initialized in the constructor and is not declared `@Nullable`]
codetoanalyze/java/nullsafe-default/FieldNotInitialized.java, codetoanalyze.java.nullsafe_default.FieldNotInitialized$InitIfNull.<init>(codetoanalyze.java.nullsafe_default.FieldNotInitialized), 0, ERADICATE_FIELD_NOT_INITIALIZED, no_bucket, WARNING, [Field `FieldNotInitialized$InitIfNull.shouldBeGood_FIXME` is not initialized in the constructor and is not declared `@Nullable`]

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