diff --git a/gclc-test/pom.xml b/gclc-test/pom.xml
index f3870a3..4fbf936 100644
--- a/gclc-test/pom.xml
+++ b/gclc-test/pom.xml
@@ -51,6 +51,11 @@
 			<artifactId>gclc</artifactId>
 			<version>2.0.12</version>
 		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.12</version>
+		</dependency>
 	</dependencies>
 	<reporting>
 		<plugins>
diff --git a/gclc-test/src/main/java/net/bigeon/gclc/test/InputContract.java b/gclc-test/src/main/java/net/bigeon/gclc/test/InputContract.java
new file mode 100644
index 0000000..a314f96
--- /dev/null
+++ b/gclc-test/src/main/java/net/bigeon/gclc/test/InputContract.java
@@ -0,0 +1,37 @@
+/**
+ * 
+ */
+package net.bigeon.gclc.test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.IOException;
+import java.util.function.Supplier;
+
+import net.bigeon.gclc.manager.ConsoleInput;
+
+/**
+ * @author Emmanuel Bigeon
+ *
+ */
+public final class InputContract {
+
+    public void testInputContract(final Supplier<ConsoleInput> inputs)
+            throws IOException {
+        // Test close contract
+        final ConsoleInput input = inputs.get();
+        assertFalse("An input should not initially be closed", input.isClosed());
+        input.close();
+        assertTrue("An input should close", input.isClosed());
+        input.close();
+        assertTrue("A closed input should stay closed", input.isClosed());
+        try {
+            input.prompt();
+            fail("Closed input prompting should fail");
+        } catch (final IOException e) {
+            // ok
+        }
+    }
+}