1 files changed, 21 insertions, 0 deletions
diff --git a/src/main/java/org/junit/internal/builders/JUnit3Builder.java b/src/main/java/org/junit/internal/builders/JUnit3Builder.java
new file mode 100644
index 0000000..ddb070b
--- /dev/null
+++ b/src/main/java/org/junit/internal/builders/JUnit3Builder.java
@@ -0,0 +1,21 @@
+/**
+ * 
+ */
+package org.junit.internal.builders;
+
+import org.junit.internal.runners.JUnit38ClassRunner;
+import org.junit.runner.Runner;
+import org.junit.runners.model.RunnerBuilder;
+
+public class JUnit3Builder extends RunnerBuilder {
+	@Override
+	public Runner runnerForClass(Class<?> testClass) throws Throwable {
+		if (isPre4Test(testClass))
+			return new JUnit38ClassRunner(testClass);
+		return null;
+	}
+
+	boolean isPre4Test(Class<?> testClass) {
+		return junit.framework.TestCase.class.isAssignableFrom(testClass);
+	}
+}
+\ No newline at end of file