✅ YarnDriver tests were added

src/test/java/com/jfrog/ide/common/yarn/YarnDriverTest.java

@@ -0,0 +1,84 @@
+package com.jfrog.ide.common.yarn;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.apache.commons.io.FileUtils;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.testng.Assert.*;
+
+/**
+ * Test the 'why' functionality in YarnDriver.
+ */
+public class YarnDriverTest {
+    private static final Path YARN_ROOT = Paths.get(".").toAbsolutePath().normalize().resolve(Paths.get("src", "test", "resources", "yarn"));
+
+    enum Project {
+
+        EMPTY("empty"),
+        DEPENDENCY("dependency");
+
+        private final Path path;
+
+        Project(String path) {
+            this.path = YARN_ROOT.resolve(path);
+        }
+    }
+
+    private final YarnDriver yarnDriver = new YarnDriver(null);
+    private File tempProject;
+
+    @BeforeMethod
+    public void setUp(Object[] testArgs) {
+        try {
+            tempProject = Files.createTempDirectory("ide-plugins-common-yarn").toFile();
+            tempProject.deleteOnExit();
+            FileUtils.copyDirectory(((Project) testArgs[0]).path.toFile(), tempProject);
+        } catch (IOException e) {
+            fail(e.getMessage(), e);
+        }
+    }
+
+    @AfterMethod
+    public void tearDown() {
+        FileUtils.deleteQuietly(tempProject);
+    }
+
+    @DataProvider
+    private Object[][] yarnWhyProvider() {
+        return new Object[][]{
+                {Project.DEPENDENCY, "progress"},
+                {Project.DEPENDENCY, "has-flag"},
+                {Project.EMPTY, "component-name"} // Should return an error
+        };
+    }
+
+    @Test(dataProvider = "yarnWhyProvider")
+    public void yarnWhyTest(Project project, String componentName) {
+        try {
+            JsonNode[] whyResults = yarnDriver.why(tempProject, componentName);
+            assertNotNull(whyResults);
+            assertTrue(whyResults.length > 0);
+
+            if (project == Project.EMPTY) {
+                assertTrue(whyResults[0].has("problems"), "Yarn why command result should contain problems:\n" + whyResults[0].toString());
+                return;
+            }
+
+            for (JsonNode result : whyResults) {
+                assertNotNull(result);
+                assertFalse(result.has("problems"), "Unexpected problems in yarn why command result:\n" + result.get("problems"));
+            }
+        } catch (IOException e) {
+            fail("Exception during yarn why command: " + e.getMessage(), e);
+        }
+    }
+}