tests: introduced MidpointTestContext and its base implementation

This context also provides basic getTestName* methods based on
abstract methods getTestClass() and getTestMethodName().

tools/test-ng/src/main/java/com/evolveum/midpoint/tools/testng/MidpointTestContext.java

@@ -0,0 +1,38 @@
+package com.evolveum.midpoint.tools.testng;
+
+/**
+ * Basic contract for test-method context (typically available through thread-local variable).
+ */
+public interface MidpointTestContext {
+
+    /**
+     * Returns the actual instantiated test class.
+     */
+    Class<?> getTestClass();
+
+    /**
+     * Returns the name of the test method.
+     */
+    String getTestMethodName();
+
+    /**
+     * Returns test name in form of "class-simple-name.method".
+     */
+    default String getTestName() {
+        return getTestClass().getSimpleName() + "." + getTestMethodName();
+    }
+
+    /**
+     * Returns short test name - currently the same like {@link #getTestMethodName()}.
+     */
+    default String getTestNameShort() {
+        return getTestMethodName();
+    }
+
+    /**
+     * Returns long test name in form of "fully.qualified.class-name.method".
+     */
+    default String getTestNameLong() {
+        return getTestClass().getName() + "." + getTestMethodName();
+    }
+}

tools/test-ng/src/main/java/com/evolveum/midpoint/tools/testng/SimpleMidpointTestContext.java

@@ -0,0 +1,39 @@
+package com.evolveum.midpoint.tools.testng;
+
+import org.testng.ITestResult;
+
+public class SimpleMidpointTestContext implements MidpointTestContext {
+
+    private static final ThreadLocal<SimpleMidpointTestContext> TEST_CONTEXT_THREAD_LOCAL =
+            new ThreadLocal<>();
+
+    private final ITestResult testResult;
+
+    public SimpleMidpointTestContext(ITestResult testResult) {
+        this.testResult = testResult;
+    }
+
+    @Override
+    public Class<?> getTestClass() {
+        return testResult.getMethod().getTestClass().getRealClass();
+    }
+
+    @Override
+    public String getTestMethodName() {
+        return testResult.getMethod().getMethodName();
+    }
+
+    public static SimpleMidpointTestContext create(ITestResult testResult) {
+        SimpleMidpointTestContext ctx = new SimpleMidpointTestContext(testResult);
+        TEST_CONTEXT_THREAD_LOCAL.set(ctx);
+        return ctx;
+    }
+
+    public static SimpleMidpointTestContext get() {
+        return TEST_CONTEXT_THREAD_LOCAL.get();
+    }
+
+    public static void destroy() {
+        TEST_CONTEXT_THREAD_LOCAL.remove();
+    }
+}