Setting the Environment Variables with version 1.18.0 not working with Junit 5

[visha-r]

I am trying to set the environment variables using the version 1.18.0 and I am always getting null. I am using Junit 5 and have no issues using 1.17.2 version to set the system environment variables. I need to set different environment values for different tests, so not setting the value right after creating the rule. My code looks like the following:

@Rule
private final EnvironmentVariables environmentVariables = new EnvironmentVariables();

@Test
void testEnvValues() {
    environmentVariables.set("service_env", "dev");
    assertEquals("dev", System.getenv("service_env")); // always fails
}

[stefanbirkner]

Does this work with System Rules 1.17.2 and JUnit Lambda (JUnit 5)?

[visha-r]

Yes it works with System Rules 1.17.2 and Junit 5.

[realtec]

Same problem here, 1.80.0 and 1.19.0 doesn't work but 1.17.2 does.

[artem-emelin]

Same for me, 1.17.2 works but 1.19.0 doesn't for JUnit 5.3.2

[wojtekk]

The same for me - 1.17.2 works but 1.18.0 and 1.19.0 does not for JUnit 5.5.0

[vxrahn]

Using 1.17.2 works but throws

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.junit.contrib.java.lang.system.EnvironmentVariables to field java.util.Collections$UnmodifiableMap.m
WARNING: All illegal access operations will be denied in a future release

Is there any solution currently in progress to avoid this error?

[hq6]

Also working with 1.17.2 (with the above warnings) when using JUnit 5. 1.19 does not work in the sense that environmental variables are still NULL after being set.

[ashleyfrieze]

Jupiter support available in https://github.com/webcompere/system-stubs/tree/master/system-stubs-jupiter - a fork of system-lambda

[uklimaschewski]

Any chance this is getting fixed for?

Java 17 (Temurin) and junit 4, using 1.17.2:

java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Map java.util.Collections$UnmodifiableMap.m accessible: module java.base does not "opens java.util" to unnamed module @50cbc42f
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.getFieldValue(EnvironmentVariables.java:147)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.getEditableMapOfVariables(EnvironmentVariables.java:109)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.access$000(EnvironmentVariables.java:36)
	at org.junit.contrib.java.lang.system.EnvironmentVariables$EnvironmentVariablesStatement.restoreOriginalVariables(EnvironmentVariables.java:93)
	at org.junit.contrib.java.lang.system.EnvironmentVariables$EnvironmentVariablesStatement.evaluate(EnvironmentVariables.java:84)
	at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:258)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)

Java 17 (Temurin) and junit 4, using 1.19.0:

java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Map java.util.Collections$UnmodifiableMap.m accessible: module java.base does not "opens java.util" to unnamed module @61a52fbd
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.getFieldValue(EnvironmentVariables.java:188)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.getEditableMapOfVariables(EnvironmentVariables.java:150)
	at org.junit.contrib.java.lang.system.EnvironmentVariables.access$200(EnvironmentVariables.java:49)
	at org.junit.contrib.java.lang.system.EnvironmentVariables$EnvironmentVariablesStatement.restoreOriginalVariables(EnvironmentVariables.java:134)
	at org.junit.contrib.java.lang.system.EnvironmentVariables$EnvironmentVariablesStatement.evaluate(EnvironmentVariables.java:125)
	at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:258)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)

[ashleyfrieze]

@uklimaschewski https://github.com/stefanbirkner/system-rules/issues/70#issuecomment-729623890

System Stubs is essentially compatible with System Rules (package names have changed) and does support later Java.

[uklimaschewski]

@ashleyfrieze Thanks, good to know!

[ashleyfrieze]

@ashleyfrieze Thanks, good to know!

It wasn't my intention to replace this tooling. I wanted a JUnit 5 plugin that worked a certain way. I've also offered the JDK17 compatible solution to whoever wants to steal the code from my repo. That said, it comes at a price, which is the adoption of mockito-inline.