1 files changed, 39 insertions, 0 deletions
diff --git a/src/main/java/org/junit/runners/model/InvalidTestClassError.java b/src/main/java/org/junit/runners/model/InvalidTestClassError.java
new file mode 100644
index 0000000..57be610
--- /dev/null
+++ b/src/main/java/org/junit/runners/model/InvalidTestClassError.java
@@ -0,0 +1,39 @@
+package org.junit.runners.model;
+
+import java.util.List;
+
+/**
+ * Thrown by {@link org.junit.runner.Runner}s in case the class under test is not valid.
+ * <p>
+ * Its message conveniently lists all of the validation errors.
+ *
+ * @since 4.13
+ */
+public class InvalidTestClassError extends InitializationError {
+    private static final long serialVersionUID = 1L;
+
+    private final String message;
+
+    public InvalidTestClassError(Class<?> offendingTestClass, List<Throwable> validationErrors) {
+        super(validationErrors);
+        this.message = createMessage(offendingTestClass, validationErrors);
+    }
+
+    private static String createMessage(Class<?> testClass, List<Throwable> validationErrors) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(String.format("Invalid test class '%s':", testClass.getName()));
+        int i = 1;
+        for (Throwable error : validationErrors) {
+            sb.append("\n  " + (i++) + ". " + error.getMessage());
+        }
+        return sb.toString();
+    }
+
+    /**
+     * @return a message with a list of all of the validation errors
+     */
+    @Override
+    public String getMessage() {
+        return message;
+    }
+}