#61 extra test

src/main/java/com/jcabi/manifests/Manifests.java

@@ -100,11 +100,11 @@
  * <p>If you want to add more manifests to the collection, use
  * its static instance:
  *
- * <pre>Manifests.DEFAULT.append(new FilesMfs(new File("MANIFEST.MF")));</pre>
+ * <pre>Manifests.singleton().append(new FilesMfs(new File("MANIFEST.MF")));</pre>
  *
  * <p>You can also modify the map directly:
  *
- * <pre>Manifests.DEFAULT.put("Hello", "world");</pre>
+ * <pre>Manifests.singleton().put("Hello", "world");</pre>
  *
  * <p>The only dependency you need (check the latest version at
  * <a href="http://manifests.jcabi.com/">jcabi-manifests</a>):
@@ -164,7 +164,7 @@ public Manifests(final Map<String, String> attrs) {
      * Get the singleton.
      *
      * @return The singleton
-     * @since 1.3
+     * @since 2.0.0
      */
     public static MfMap singleton() {
         return Manifests.DEFAULT.get();

src/main/java/com/jcabi/manifests/MfMap.java

@@ -99,7 +99,7 @@ public interface MfMap {
      *
      * @param mfs Content to append
      * @throws IOException If fails on I/O problem
-     * @since 1.0
+     * @since 2.0.0
      */
     void append(Mfs mfs) throws IOException;
 }

src/test/java/com/jcabi/manifests/StringMfsTest.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2012-2022, jcabi.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met: 1) Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer. 2) Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution. 3) Neither the name of the jcabi.com nor
+ * the names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+ * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jcabi.manifests;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import org.apache.commons.io.IOUtils;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test case for {@link StringMfs}.
+ *
+ * @since 2.0.0
+ */
+final class StringMfsTest {
+
+    @Test
+    void turnsStringIntoMfs() throws IOException {
+        final InputStream input = new StringMfs("Foo: bar").fetch().iterator().next();
+        MatcherAssert.assertThat(
+            IOUtils.toString(input, StandardCharsets.UTF_8),
+            Matchers.containsString("Foo:")
+        );
+    }
+
+}