I am having some issue with Mocking a class instrumented with jacoco.
Problem:
1. Junit Testcase Mocking a class with some static final fields.
2. Class under Test is instrumented with jacoco-0.8.3
3. Mocking is done using jmockit-1.44
4. Using OpenJDK-11.0.1
5. Test fails with **"Method <clinit> is not static in class file"**
6. Test pass with JDK-1.8
Here is the stacktrace
Method <clinit> is not static in class file $Subclass_ClassUnderTest
java.lang.ClassFormatError: Method <clinit> is not static in class file
$Subclass_ClassUnderTest
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:877)
at ClassUnderTestTestcase$3.<init>(ClassUnderTestTestcase.java:xx)
at ClassUnderTestTestcase.testSettersAndGetters(ClassUnderTestTestcase.java:xx)
I tried to investigate the bytecode and found something unusual(i guess)
**With Java 11**
// access flags 0x100A
private static synthetic $jacocoInit()[Z
GETSTATIC ClassUnderTest.$jacocoData : [Z
DUP
IFNONNULL L0
POP
LDC -1475355800743669619
LDC "ClassUnderTest"
BIPUSH 64
INVOKESTATIC org/jacoco/agent/rt/internal_1f1cc91/Offline.getProbes
(JLjava/lang/String;I)[Z
DUP
PUTSTATIC ClassUnderTest.$jacocoData : [Z
L0
**With Java8**
// access flags 0x100A
private static synthetic $jacocoInit()[Z
GETSTATIC ClassUnderTest.$jacocoData : [Z
DUP
IFNONNULL L0
POP
LDC 4330111099009117958
LDC "ClassUnderTest"
BIPUSH 64
INVOKESTATIC org/jacoco/agent/rt/internal_1f1cc91/Offline.getProbes
(JLjava/lang/String;I)[Z
DUP
PUTSTATIC ClassUnderTest.$jacocoData : [Z
L0
Any Idea?
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