1 files changed, 81 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/com/yahoo/yolean/ExceptionsTestCase.java b/vespajlib/src/test/java/com/yahoo/yolean/ExceptionsTestCase.java
new file mode 100644
index 00000000000..53cf3efe363
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+++ b/vespajlib/src/test/java/com/yahoo/yolean/ExceptionsTestCase.java
@@ -0,0 +1,81 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.yolean;
+
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.NoSuchFileException;
+import java.util.Optional;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+
+/**
+ * @author bratseth
+ */
+public class ExceptionsTestCase {
+
+    @Test
+    public void testFindCause() {
+        IllegalArgumentException e1 = new IllegalArgumentException();
+        IllegalStateException e2 = new IllegalStateException(e1);
+        RuntimeException e3 = new RuntimeException(e2);
+
+        assertEquals(Optional.of(e3), Exceptions.findCause(e3, RuntimeException.class));
+        assertEquals(Optional.of(e1), Exceptions.findCause(e3, IllegalArgumentException.class));
+        assertEquals(Optional.empty(), Exceptions.findCause(e3, NumberFormatException.class));
+
+        assertEquals(Optional.of(e2), Exceptions.findCause(e2, RuntimeException.class));
+    }
+
+    @Test
+    public void testToMessageStrings() {
+        assertEquals("Blah",Exceptions.toMessageString(new Exception("Blah")));
+        assertEquals("Blah", Exceptions.toMessageString(new Exception(new Exception("Blah"))));
+        assertEquals("Exception",Exceptions.toMessageString(new Exception()));
+        assertEquals("Foo: Blah",Exceptions.toMessageString(new Exception("Foo",new Exception(new IllegalArgumentException("Blah")))));
+        assertEquals("Foo",Exceptions.toMessageString(new Exception("Foo",new Exception("Foo"))));
+        assertEquals("Foo: Exception",Exceptions.toMessageString(new Exception("Foo",new Exception())));
+        assertEquals("Foo",Exceptions.toMessageString(new Exception(new Exception("Foo"))));
+    }
+
+    @Test
+    public void testUnchecks() {
+        try {
+            Exceptions.uncheck(this::throwNoSuchFileException);
+        } catch (UncheckedIOException e) {
+            assertEquals("filename", e.getCause().getMessage());
+        }
+
+        try {
+            Exceptions.uncheck(this::throwNoSuchFileException, "additional %s", "info");
+        } catch (UncheckedIOException e) {
+            assertEquals("additional info", e.getMessage());
+        }
+
+        try {
+            int i = Exceptions.uncheck(this::throwNoSuchFileExceptionSupplier);
+        } catch (UncheckedIOException e) {
+            assertEquals("filename", e.getCause().getMessage());
+        }
+
+        try {
+            int i = Exceptions.uncheck(this::throwNoSuchFileExceptionSupplier, "additional %s", "info");
+        } catch (UncheckedIOException e) {
+            assertEquals("additional info", e.getMessage());
+        }
+
+        Exceptions.uncheckAndIgnore(this::throwNoSuchFileException, NoSuchFileException.class);
+        assertNull(Exceptions.uncheckAndIgnore(this::throwNoSuchFileExceptionSupplier, NoSuchFileException.class));
+    }
+
+    private void throwNoSuchFileException() throws IOException {
+        throw new NoSuchFileException("filename");
+    }
+
+    private int throwNoSuchFileExceptionSupplier() throws IOException {
+        throw new NoSuchFileException("filename");
+    }
+}