#1466 Added titled

src/main/java/org/cactoos/text/Titled.java

@@ -0,0 +1,59 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017-2020 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.text;
+
+import java.util.stream.Collectors;
+import org.cactoos.Text;
+
+/**
+ * Text in titled case.
+ *
+ * @since 0.46
+ */
+public final class Titled extends TextEnvelope  {
+
+    /**
+     * Ctor.
+     *
+     * @param text The text
+     */
+    public Titled(final String text) {
+        this(new TextOf(text));
+    }
+
+    /**
+     * Ctor.
+     * @param text The text
+     */
+    public Titled(final Text text) {
+        super(
+            new TextOf(
+                () -> text.asString()
+                    .codePoints()
+                    .mapToObj(cp -> new String(Character.toChars(Character.toTitleCase(cp))))
+                    .collect(Collectors.joining())
+            )
+        );
+    }
+}

src/test/java/org/cactoos/text/TitledTest.java

@@ -0,0 +1,80 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017-2020 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.text;
+
+import org.junit.jupiter.api.Test;
+import org.llorllale.cactoos.matchers.Assertion;
+import org.llorllale.cactoos.matchers.TextIs;
+
+/**
+ * Test case for {@link Titled}.
+ * @since 0.46
+ */
+public class TitledTest {
+
+    @Test
+    void titleEmptyText() {
+        new Assertion<>(
+            "Must title an empty text",
+            new Titled(new TextOf("")),
+            new TextIs("")
+        ).affirm();
+    }
+
+    @Test
+    void titleSingleLowerCaseText() {
+        new Assertion<>(
+            "Must title single lower case text",
+            new Titled(new TextOf("f")),
+            new TextIs("F")
+        ).affirm();
+    }
+
+    @Test
+    void titleSingleUpperCaseText() {
+        new Assertion<>(
+            "Must title single upper case text",
+            new Titled(new TextOf("F")),
+            new TextIs("F")
+        ).affirm();
+    }
+
+    @Test
+    void titleTextWithUnicodeCharacter() {
+        new Assertion<>(
+            "Must title unicode character dž",
+            new Titled("dž"),
+            new TextIs("Dž")
+        ).affirm();
+    }
+
+    @Test
+    void titleString() {
+        new Assertion<>(
+            "Must title string",
+            new Titled("foo"),
+            new TextIs("FOO")
+        ).affirm();
+    }
+}