#172: Max and Min

yegor256 · Jun 28, 2017 · bd65a06 · bd65a06
1 parent 41a598e
commit bd65a06
Show file tree

Hide file tree

Showing 6 changed files with 308 additions and 0 deletions.
diff --git a/src/main/java/org/cactoos/math/Max.java b/src/main/java/org/cactoos/math/Max.java
@@ -0,0 +1,62 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.math;
+
+import org.cactoos.Scalar;
+
+/**
+ * Find the greater among numbers.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ */
+public final class Max implements Scalar<Number> {
+
+    /**
+     * Numbers.
+     */
+    private final Number[] numbers;
+
+    /**
+     * Ctor.
+     * @param numbers The numbers
+     */
+    public Max(final Number... numbers) {
+        this.numbers = numbers;
+    }
+
+    @Override
+    public Number asValue() throws Exception {
+        Number max = this.numbers[0];
+        for (int index = 1; index < this.numbers.length; ++index) {
+            if (this.numbers[index].doubleValue() > max.doubleValue()) {
+                max = this.numbers[index];
+            }
+        }
+        return max;
+    }
+}
diff --git a/src/main/java/org/cactoos/math/Min.java b/src/main/java/org/cactoos/math/Min.java
@@ -0,0 +1,62 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.math;
+
+import org.cactoos.Scalar;
+
+/**
+ * Find the smaller among numbers.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ */
+public final class Min implements Scalar<Number> {
+
+    /**
+     * Numbers.
+     */
+    private final Number[] numbers;
+
+    /**
+     * Ctor.
+     * @param numbers The numbers
+     */
+    public Min(final Number... numbers) {
+        this.numbers = numbers;
+    }
+
+    @Override
+    public Number asValue() throws Exception {
+        Number min = this.numbers[0];
+        for (int index = 1; index < this.numbers.length; ++index) {
+            if (this.numbers[index].doubleValue() < min.doubleValue()) {
+                min = this.numbers[index];
+            }
+        }
+        return min;
+    }
+}
diff --git a/src/main/java/org/cactoos/math/package-info.java b/src/main/java/org/cactoos/math/package-info.java
@@ -0,0 +1,32 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.
+ */
+
+/**
+ * Math.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ */
+package org.cactoos.math;
diff --git a/src/test/java/org/cactoos/math/MaxTest.java b/src/test/java/org/cactoos/math/MaxTest.java
@@ -0,0 +1,60 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.math;
+
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test case for {@link Max}.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+@SuppressWarnings("PMD.AvoidDuplicateLiterals")
+public final class MaxTest {
+
+    @Test
+    public void maxAmongOneTest() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't find the greater number",
+            // @checkstyle MagicNumber (2 lines)
+            new Max(10).asValue(),
+            Matchers.equalTo(10)
+        );
+    }
+
+    @Test
+    public void maxAmongManyTest() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't find the greater number",
+            // @checkstyle MagicNumber (2 lines)
+            new Max(10, 5, 7, 2, 100).asValue(),
+            Matchers.equalTo(100)
+        );
+    }
+}
diff --git a/src/test/java/org/cactoos/math/MinTest.java b/src/test/java/org/cactoos/math/MinTest.java
@@ -0,0 +1,60 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.math;
+
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test case for {@link Min}.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+@SuppressWarnings("PMD.AvoidDuplicateLiterals")
+public final class MinTest {
+
+    @Test
+    public void minAmongOneTest() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't find the smaller number",
+            // @checkstyle MagicNumber (2 lines)
+            new Min(10).asValue(),
+            Matchers.equalTo(10)
+        );
+    }
+
+    @Test
+    public void minAmongManyTest() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't find the smaller number",
+            // @checkstyle MagicNumber (2 lines)
+            new Min(10, 5, 7, 2, 100).asValue(),
+            Matchers.equalTo(2)
+        );
+    }
+}
diff --git a/src/test/java/org/cactoos/math/package-info.java b/src/test/java/org/cactoos/math/package-info.java
@@ -0,0 +1,32 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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.
+ */
+
+/**
+ * Math, tests.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.6
+ */
+package org.cactoos.math;