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PR review changes: Added more scenarios to the static variable test
Covered the following cases: 1. Variable initialization in a static block 2. Variable initialization in a static nested class
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‎core-java-modules/core-java-lang-3/src/main/java/com/baeldung/staticvariables/StaticVariableDemo.java‎

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@@ -3,7 +3,21 @@
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public class StaticVariableDemo {
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public static int i;
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public static int j = 20;
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public static int z;
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static {
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z = 30;
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a = 40;
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}
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public static int a = 50;
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public static final int b = 100;
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public StaticVariableDemo() {
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}
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static class Nested {
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public static String nestedClassStaticVariable = "test";
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}
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}

‎core-java-modules/core-java-lang-3/src/test/java/com/baeldung/staticvariables/StaticVariableUnitTest.java‎

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@@ -33,4 +33,81 @@ public void initializeStaticVariable_checkAssignedValues() {
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}
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}
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@Test
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public void initializeStaticVariable_checkStaticBlock() {
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try {
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Class<?> staticVariableDemo = this.getClass()
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.getClassLoader()
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.loadClass("com.baeldung.staticvariables.StaticVariableDemo");
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Field field1 = staticVariableDemo.getField("z");
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assertThat(field1.getInt(staticVariableDemo)).isEqualTo(30);
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Field field2 = staticVariableDemo.getField("a");
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assertThat(field2.getInt(staticVariableDemo)).isEqualTo(50);
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} catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
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e.printStackTrace();
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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}
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}
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@Test
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public void initializeStaticVariable_checkFinalValues() {
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try {
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Class<?> staticVariableDemo = this.getClass()
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.getClassLoader()
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.loadClass("com.baeldung.staticvariables.StaticVariableDemo");
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Field field1 = staticVariableDemo.getField("b");
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assertThat(field1.getInt(staticVariableDemo)).isEqualTo(100);
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} catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
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e.printStackTrace();
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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}
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}
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@Test
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public void initializeStaticVariable_checkInnerClassValues() {
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try {
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Class<?> staticVariableDemo = this.getClass()
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.getClassLoader()
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.loadClass("com.baeldung.staticvariables.StaticVariableDemo");
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Class<?>[] nestedClasses = staticVariableDemo.getClasses();
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for (Class<?> nestedClass : nestedClasses) {
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if (nestedClass.getName()
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.equals("Nested")) {
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Field field1 = nestedClass.getField("nestedClassStaticVariable");
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assertThat(field1.get(nestedClass)).isEqualTo("test");
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}
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}
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} catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
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e.printStackTrace();
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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}
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}
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}

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