test: Added convenience RepeatTestRule.

subprojects-internal/test-jtrim-utils/src/main/java/org/jtrim2/testutils/RepeatTest.java

@@ -0,0 +1,12 @@
+package org.jtrim2.testutils;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface RepeatTest {
+    public int value();
+}

subprojects-internal/test-jtrim-utils/src/main/java/org/jtrim2/testutils/RepeatTestRule.java

@@ -0,0 +1,28 @@
+package org.jtrim2.testutils;
+
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+
+public final class RepeatTestRule implements TestRule {
+    @Override
+    public Statement apply(Statement base, Description description) {
+        RepeatTest annotation = description.getAnnotation(RepeatTest.class);
+        if (annotation == null) {
+            return base;
+        }
+        int repeatCount = annotation.value();
+        if (repeatCount <= 0) {
+            throw new IllegalStateException("Unexpected repeat count " + repeatCount
+                    + " on " + description.getDisplayName());
+        }
+        return new Statement() {
+            @Override
+            public void evaluate() throws Throwable {
+                for (int i = repeatCount; i > 0; i--) {
+                    base.evaluate();
+                }
+            }
+        };
+    }
+}