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import org.checkerframework.checker.nullness.qual.*;
@org.checkerframework.framework.qual.DefaultQualifier(Nullable.class)
class JavaCopFlow {
public void testIf(String str) {
// String str = "foo";
@NonNull String a;
if (str != null) {
a = str;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testIfNoBlock(String str) {
// String str = "foo";
@NonNull String a;
if (str != null) {
a = str;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testElse(String str) {
// String str = "foo";
@NonNull String a;
if (str == null) {
testAssert("");
} else {
a = str;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testElseNoBlock(String str) {
// String str = "foo";
@NonNull String a;
if (str == null) {
testAssert("");
} else {
a = str;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testReturnIf(String str) {
// String str = "foo";
if (str == null) {
testAssert("");
return;
}
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testReturnElse(String str) {
// String str = "foo";
if (str != null) {
testAssert("");
} else {
return;
}
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testThrowIf(String str) {
// String str = "foo";
if (str == null) {
testAssert("");
throw new RuntimeException("foo");
}
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testThrowElse(String str) {
// String str = "foo";
if (str != null) {
testAssert("");
} else {
throw new RuntimeException("foo");
}
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testAssert(@Nullable String str) {
assert str != null : "@AssumeAssertion(nullness)";
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testWhile(String str) {
// String str = "foo";
while (str != null) {
@NonNull String a = str;
break;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testIfInstanceOf(String str) {
// String str = "foo";
@NonNull String a;
if (str instanceof String) {
a = str;
}
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testNew() {
String str = "foo";
@NonNull String a = str;
str = null;
// :: error: (assignment.type.incompatible)
@NonNull String b = str;
}
public void testExit(String str) {
// String str = null;
if (str == null) {
System.exit(0);
}
@NonNull String a = str;
}
void methodThatThrowsRuntime() {
throw new RuntimeException();
}
public void retestWhile(@Nullable String str) {
while (str != null) {
@NonNull String a = str;
break;
}
int i = 0;
while (true) {
// :: error: (assignment.type.incompatible)
@NonNull String a = str;
str = null;
i++;
if (i > 2) break;
}
str = null;
@NonNull String b = "hi";
try {
// :: error: (assignment.type.incompatible)
b = str;
methodThatThrowsRuntime();
str = "bar";
} finally {
// :: error: (assignment.type.incompatible)
b = str;
}
str = null;
// :: error: (assignment.type.incompatible)
b = str;
str = "hi";
b = (String) str;
}
}
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