BAEL-7231: Moved the code to a separate module (#16272)

2024-04-25 17:51:31 +02:00
parent 611d68f41e
commit df6b36303a
8 changed files with 73 additions and 0 deletions
@@ -0,0 +1,44 @@
+package com.baeldung.setenvironment;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.io.IOException;
+import java.util.Map;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
+
+class SettingChildProcessEnvironmentVariableUnitTest {
+
+    public static final String ENVIRONMENT_VARIABLE_NAME = "test";
+    public static final String ENVIRONMENT_VARIABLE_VALUE = "Hello World";
+    public static final String CHILD_PROCESS_CONDITION = "CHILD_PROCESS_TEST";
+    public static final String CHILD_PROCESS_VALUE = "true";
+    public static final String CHILD_PROCESS_TAG = "child_process";
+    public static final String TAG = String.format("-Dgroups=%s", CHILD_PROCESS_TAG);
+    private final String testClass = String.format("-Dtest=%s", getClass().getName());
+    private final String[] arguments = {"mvn", "test", TAG, testClass};
+
+    @Test
+    void givenChildProcessTestRunner_whenRunTheTest_thenAllSucceed()
+      throws IOException, InterruptedException {
+        ProcessBuilder processBuilder = new ProcessBuilder();
+        processBuilder.inheritIO();
+
+        Map<String, String> environment = processBuilder.environment();
+        environment.put(CHILD_PROCESS_CONDITION, CHILD_PROCESS_VALUE);
+        environment.put(ENVIRONMENT_VARIABLE_NAME, ENVIRONMENT_VARIABLE_VALUE);
+        Process process = processBuilder.command(arguments).start();
+
+        int errorCode = process.waitFor();
+        assertThat(errorCode).isZero();
+    }
+
+    @Test
+    @EnabledIfEnvironmentVariable(named = CHILD_PROCESS_CONDITION, matches = CHILD_PROCESS_VALUE)
+    @Tag(CHILD_PROCESS_TAG)
+    void givenChildProcess_whenGetEnvironmentVariable_thenReturnsCorrectValue() {
+        String actual = System.getenv(ENVIRONMENT_VARIABLE_NAME);
+        assertThat(actual).isEqualTo(ENVIRONMENT_VARIABLE_VALUE);
+    }
+}
@@ -0,0 +1,19 @@
+package com.baeldung.setenvironment;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
+
+class SettingDockerEnvironmentVariableUnitTest {
+
+    public static final String ENV_VARIABLE_NAME = "CUSTOM_DOCKER_ENV_VARIABLE";
+    public static final String ENV_VARIABLE_VALUE = "TRUE";
+
+    @Test
+    @EnabledIfEnvironmentVariable(named = ENV_VARIABLE_NAME, matches = ENV_VARIABLE_VALUE)
+    void givenDockerEnvironment_whenGetEnvironmentVariable_thenReturnsCorrectValue() {
+        String actual = System.getenv(ENV_VARIABLE_NAME);
+        assertEquals(ENV_VARIABLE_VALUE, actual);
+    }
+}
@@ -0,0 +1,83 @@
+package com.baeldung.setenvironment;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.lang.reflect.Field;
+import java.util.Collections;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledForJreRange;
+import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
+import org.junit.jupiter.api.condition.JRE;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.junitpioneer.jupiter.SetEnvironmentVariable;
+
+class SettingSameProcessEnvironmentVariableUnitTest {
+
+    private static final String PROCESS_ENVIRONMENT = "java.lang.ProcessEnvironment";
+    private static final String ENVIRONMENT = "theUnmodifiableEnvironment";
+    private static final String SOURCE_MAP = "m";
+    private static final Object STATIC_METHOD = null;
+    private static final Class<?> UMODIFIABLE_MAP_CLASS
+      = Collections.unmodifiableMap(Collections.emptyMap()).getClass();
+    private static final Class<?> MAP_CLASS = Map.class;
+    public static final String ENV_VARIABLE_NAME = "test";
+    public static final String ENV_VARIABLE_VALUE = "Hello World";
+
+    @ParameterizedTest
+    @CsvSource({ENV_VARIABLE_VALUE + "," + ENV_VARIABLE_NAME})
+    @EnabledForJreRange(max = JRE.JAVA_16)
+    void givenReflexiveAccess_whenGetSourceMap_thenSuccessfullyModifyVariables(String environmentVariable, String value)
+      throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {
+        Map<String, String> modifiableEnvironment = getModifiableEnvironment();
+        assertThat(modifiableEnvironment).isNotNull();
+
+        modifiableEnvironment.put(environmentVariable, value);
+        String actual = modifiableEnvironment.get(environmentVariable);
+        assertThat(actual).isEqualTo(value);
+    }
+
+    @Test
+    @EnabledIfEnvironmentVariable(named = "PATH", matches = ".*",
+      disabledReason = "The test relies on the presence of PATH variable")
+    void givenOS_whenGetPath_thenVariableIsPresent() {
+        String classPath = System.getenv("PATH");
+        assertThat(classPath).isNotNull();
+    }
+
+    @Test
+    void givenOS_whenGetEnv_thenVariablesArePresent() {
+        Map<String, String> environment = System.getenv();
+        assertThat(environment).isNotNull();
+    }
+
+    @Test
+    @SetEnvironmentVariable(key = ENV_VARIABLE_NAME, value = ENV_VARIABLE_VALUE)
+    @EnabledForJreRange(max = JRE.JAVA_16)
+    void givenVariableSet_whenGetEnvironmentVariable_thenReturnsCorrectValue() {
+        String actual = System.getenv(ENV_VARIABLE_NAME);
+        assertThat(actual).isEqualTo(ENV_VARIABLE_VALUE);
+    }
+
+    @SuppressWarnings("unchecked")
+    private static Map<String, String> getModifiableEnvironment()
+      throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {
+        Class<?> environmentClass = Class.forName(PROCESS_ENVIRONMENT);
+        Field environmentField = environmentClass.getDeclaredField(ENVIRONMENT);
+        assertThat(environmentField).isNotNull();
+        environmentField.setAccessible(true);
+
+        Object unmodifiableEnvironmentMap = environmentField.get(STATIC_METHOD);
+        assertThat(unmodifiableEnvironmentMap).isNotNull();
+        assertThat(unmodifiableEnvironmentMap).isInstanceOf(UMODIFIABLE_MAP_CLASS);
+
+        Field underlyingMapField = unmodifiableEnvironmentMap.getClass().getDeclaredField(SOURCE_MAP);
+        underlyingMapField.setAccessible(true);
+        Object underlyingMap = underlyingMapField.get(unmodifiableEnvironmentMap);
+        assertThat(underlyingMap).isNotNull();
+        assertThat(underlyingMap).isInstanceOf(MAP_CLASS);
+
+        return (Map<String, String>) underlyingMap;
+    }
+}
@@ -0,0 +1,31 @@
+package com.baeldung.setenvironment;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.images.builder.ImageFromDockerfile;
+
+class SettingTestcontainerVariableUnitTest {
+
+    public static final String CONTAINER_REPORT_FILE = "/app/target/surefire-reports/TEST-com.baeldung.setenvironment.SettingDockerEnvironmentVariableUnitTest.xml";
+    public static final String HOST_REPORT_FILE = "./container-test-report.xml";
+    public static final String DOCKERFILE = "./Dockerfile";
+
+    @Test
+    @Disabled("Requires working Docker environment ")
+    void givenTestcontainerEnvironment_whenGetEnvironmentVariable_thenReturnsCorrectValue() {
+        Path dockerfilePath = Paths.get(DOCKERFILE);
+        GenericContainer container = new GenericContainer(
+          new ImageFromDockerfile().withDockerfile(dockerfilePath));
+        assertThat(container).isNotNull();
+        container.start();
+        while (container.isRunning()) {
+            // Busy spin
+        }
+        container.copyFileFromContainer(CONTAINER_REPORT_FILE, HOST_REPORT_FILE);
+    }
+}