Add test for IO

gliptak · gliptak · commit 50433620e595 · 2016-06-18T20:11:45.000-04:00
diff --git a/core/src/test/java/fj/IOTest.java b/core/src/test/java/fj/IOTest.java
@@ -0,0 +1,30 @@
+package fj;
+
+import fj.data.IO;
+import fj.data.IOFunctions;
+import org.junit.Test;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.StringReader;
+
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.assertThat;
+
+
+public class IOTest {
+
+    @Test
+    public void testLift() throws IOException {
+        final IO<String> readName = () -> new BufferedReader(new StringReader("foo")).readLine();
+        final F<String, IO<String>> upperCaseAndPrint = F1Functions.<String, IO<String>, String>o(this::println).f(String::toUpperCase);
+        final IO<String> readAndPrintUpperCasedName = IOFunctions.bind(readName, upperCaseAndPrint);
+        assertThat(readAndPrintUpperCasedName.run(), is("FOO"));
+    }
+
+    public IO<String> println(final String s) {
+        return () -> {
+            return s;
+        };
+    }
+}
