diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java b/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java
deleted file mode 100644
index bd4f40802a..0000000000
--- a/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java
+++ /dev/null
@@ -1,205 +0,0 @@
-package eu.kanade.tachiyomi.util;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import eu.kanade.tachiyomi.data.database.models.Chapter;
-import eu.kanade.tachiyomi.data.database.models.Manga;
-
-public final class ChapterRecognition {
-
-    private static final Pattern cleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d+)($|\\b)");
-    private static final Pattern uncleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d*)");
-    private static final Pattern withAlphaPostfix = Pattern.compile("(\\d+[\\.,]?\\d*\\s*)([a-z])($|\\b)");
-    private static final Pattern cleanNumber = Pattern.compile("(\\d+[\\.,]?\\d+)($|\\b)");
-    private static final Pattern uncleanNumber = Pattern.compile("(\\d+[\\.,]?\\d*)");
-    private static final Pattern withColon = Pattern.compile("(\\d+[\\.,]?\\d*\\s*:)([^\\d]|$)");
-    private static final Pattern startingNumber = Pattern.compile("^(\\d+[\\.,]?\\d*)");
-
-    private static final Pattern pUnwanted =
-            Pattern.compile("(\\b|\\d)(v|ver|vol|version|volume)\\.?\\s*\\d+\\b");
-    private static final Pattern pPart =
-            Pattern.compile("(\\b|\\d)part\\s*\\d+.+");
-
-    private ChapterRecognition() throws InstantiationException {
-        throw new InstantiationException("This class is not for instantiation");
-    }
-
-    public static void parseChapterNumber(Chapter chapter, Manga manga) {
-        if (chapter.chapter_number != -1)
-            return;
-
-        String name = chapter.name.toLowerCase();
-        Matcher matcher;
-
-        // Safest option, the chapter has a token prepended and nothing at the end of the number
-        matcher = cleanWithToken.matcher(name);
-        if (matcher.find()) {
-            chapter.chapter_number = Float.parseFloat(matcher.group(1));
-            return;
-        }
-
-        // a number with a single alpha prefix is parsed as sub-chapter
-        matcher = withAlphaPostfix.matcher(name);
-        if (matcher.find()) {
-            chapter.chapter_number = Float.parseFloat(matcher.group(1)) + parseAlphaPostFix(matcher.group(2));
-            return;
-        }
-
-        // the chapter has a token prepended and something at the end of the number
-        matcher = uncleanWithToken.matcher(name);
-        if (matcher.find()) {
-            chapter.chapter_number = Float.parseFloat(matcher.group(1));
-            return;
-        }
-
-        // Remove anything related to the volume or version
-        name = pUnwanted.matcher(name).replaceAll("$1");
-
-        List<Float> occurrences;
-
-        // If there's only one number, use it
-        matcher = uncleanNumber.matcher(name);
-        occurrences = getAllOccurrences(matcher);
-        if (occurrences.size() == 1) {
-            chapter.chapter_number =  occurrences.get(0);
-            return;
-        }
-
-        // If it has a colon, the chapter number should be that one
-        matcher = withColon.matcher(name);
-        occurrences = getAllOccurrences(matcher);
-        if (occurrences.size() == 1) {
-            chapter.chapter_number =  occurrences.get(0);
-            return;
-        }
-
-        // Prefer numbers without anything appended
-        matcher = cleanNumber.matcher(name);
-        occurrences = getAllOccurrences(matcher);
-        if (occurrences.size() == 1) {
-            chapter.chapter_number =  occurrences.get(0);
-            return;
-        }
-
-        // This can lead to issues if two numbers are separated by an space
-        name = name.replaceAll("\\s+", "");
-
-        // Try to remove the manga name from the chapter, and try again
-        String mangaName = replaceIrrelevantCharacters(manga.title);
-        String nameWithoutManga = difference(mangaName, name).trim();
-        if (!nameWithoutManga.isEmpty()) {
-            matcher = uncleanNumber.matcher(nameWithoutManga);
-            occurrences = getAllOccurrences(matcher);
-            if (occurrences.size() == 1) {
-                chapter.chapter_number =  occurrences.get(0);
-                return;
-            }
-        }
-
-        // TODO more checks (maybe levenshtein?)
-
-        // try splitting the name in parts an pick the first valid one
-        String[] nameParts = chapter.name.split("-");
-        Chapter dummyChapter = Chapter.create();
-        if (nameParts.length > 1) {
-            for (String part : nameParts) {
-                dummyChapter.name = part;
-                parseChapterNumber(dummyChapter, manga);
-                if (dummyChapter.chapter_number >= 0) {
-                    chapter.chapter_number = dummyChapter.chapter_number;
-                    return;
-                }
-            }
-        }
-
-        // Strip anything after "part xxx" and try that
-        matcher = pPart.matcher(name);
-        if (matcher.find()) {
-            name = pPart.matcher(name).replaceAll("$1");
-            dummyChapter.name = name;
-            parseChapterNumber(dummyChapter, manga);
-            if (dummyChapter.chapter_number >= 0) {
-                chapter.chapter_number = dummyChapter.chapter_number;
-                return;
-            }
-        }
-
-
-        // check for a number either at the start or right after the manga title
-        matcher = startingNumber.matcher(name);
-        if (matcher.find()) {
-            chapter.chapter_number = Float.parseFloat(matcher.group(1));
-            return;
-        }
-        matcher = startingNumber.matcher(nameWithoutManga);
-        if (matcher.find()) {
-            chapter.chapter_number = Float.parseFloat(matcher.group(1));
-            return;
-        }
-    }
-
-    /**
-     * x.a -> x.1, x.b -> x.2, etc
-     */
-    private static float parseAlphaPostFix(String postfix) {
-        char alpha = postfix.charAt(0);
-        return Float.parseFloat("0." + Integer.toString((int)alpha - 96));
-    }
-
-    public static List<Float> getAllOccurrences(Matcher matcher) {
-        List<Float> occurences = new ArrayList<>();
-        while (matcher.find()) {
-            // Match again to get only numbers from the captured text
-            String text = matcher.group();
-            Matcher m = uncleanNumber.matcher(text);
-            if (m.find()) {
-                try {
-                    Float value = Float.parseFloat(m.group(1).replaceAll(",", "."));
-                    if (!occurences.contains(value)) {
-                        occurences.add(value);
-                    }
-                } catch (NumberFormatException e) { /* Do nothing */ }
-            }
-        }
-        return occurences;
-    }
-
-    public static String replaceIrrelevantCharacters(String str) {
-        return str.replaceAll("\\s+", "").toLowerCase();
-    }
-
-    public static String difference(String str1, String str2) {
-        if (str1 == null) {
-            return str2;
-        }
-        if (str2 == null) {
-            return str1;
-        }
-        int at = indexOfDifference(str1, str2);
-        if (at == -1) {
-            return "";
-        }
-        return str2.substring(at);
-    }
-    public static int indexOfDifference(String str1, String str2) {
-        if (str1 == str2) {
-            return -1;
-        }
-        if (str1 == null || str2 == null) {
-            return 0;
-        }
-        int i;
-        for (i = 0; i < str1.length() && i < str2.length(); ++i) {
-            if (str1.charAt(i) != str2.charAt(i)) {
-                break;
-            }
-        }
-        if (i < str2.length() || i < str1.length()) {
-            return i;
-        }
-        return -1;
-    }
-}
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.kt b/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.kt
new file mode 100644
index 0000000000..31c133d634
--- /dev/null
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.kt
@@ -0,0 +1,140 @@
+package eu.kanade.tachiyomi.util
+
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+
+/**
+ * -R> = regex conversion.
+ */
+object ChapterRecognition {
+    /**
+     * All cases with Ch.xx
+     * Mokushiroku Alice Vol.1 Ch. 4: Misrepresentation -R> 4
+     */
+    private val basic = Regex("""(?<=ch\.)([0-9]+)(\.[0-9]+)?(\.?[a-z]+)?""")
+
+    /**
+     * Regex used when only one number occurrence
+     * Example: Bleach 567: Down With Snowwhite -R> 567
+     */
+    private val occurrence = Regex("""([0-9]+)(\.[0-9]+)?(\.?[a-z]+)?""")
+
+    /**
+     * Regex used when manga title removed
+     * Example: Solanin 028 Vol. 2 -> 028 Vol.2 -> 028Vol.2 -R> 028
+     */
+    private val withoutMange = Regex("""^([0-9]+)(\.[0-9]+)?(\.?[a-z]+)?""")
+
+    /**
+     * Regex used to remove unwanted tags
+     * Example Prison School 12 v.1 vol004 version1243 volume64 -R> Prison School 12
+     */
+    private val unwanted = Regex("""(?:(v|ver|vol|version|volume).?[0-9]+)""")
+
+    private val unwantedWhiteSpace = Regex("""(\s)(extra|special|omake)""")
+
+    fun parseChapterNumber(chapter: Chapter, manga: Manga) {
+        //If chapter number is known return.
+        if (chapter.chapter_number != -1f)
+            return
+
+        // Get chapter title with lower case
+        var name = chapter.name.toLowerCase()
+
+        // Remove comma's from chapter.
+        name = name.replace(',', '.')
+
+        // Remove unwanted white spaces.
+        unwantedWhiteSpace.findAll(name).let {
+            it.forEach { occurrence -> name = name.replace(occurrence.value, occurrence.value.trim()) }
+        }
+
+        // Remove unwanted tags.
+        unwanted.findAll(name).let {
+            it.forEach { occurrence -> name = name.replace(occurrence.value, "") }
+        }
+
+        // Check base case ch.xx
+        if (updateChapter(basic.find(name), chapter))
+            return
+
+        // Check one number occurrence.
+        val occurrences: MutableList<MatchResult> = arrayListOf()
+        occurrence.findAll(name).let {
+            it.forEach { occurrence -> occurrences.add(occurrence) }
+        }
+
+        if (occurrences.size == 1) {
+            if (updateChapter(occurrences[0], chapter))
+                return
+        }
+
+        // Remove manga title from chapter title.
+        val nameWithoutManga = name.replace(manga.title.toLowerCase(), "").trim()
+
+        // Check if first value is number after title remove.
+        if (updateChapter(withoutMange.find(nameWithoutManga), chapter))
+            return
+
+        // Take the first number encountered.
+        if (updateChapter(occurrence.find(nameWithoutManga), chapter))
+            return
+    }
+
+    /**
+     * Check if volume is found and update chapter
+     * @param match result of regex
+     * @param chapter chapter object
+     * @return true if volume is found
+     */
+    fun updateChapter(match: MatchResult?, chapter: Chapter): Boolean {
+        match?.let {
+            val initial = it.groups[1]?.value?.toFloat()!!
+            val subChapterDecimal = it.groups[2]?.value
+            val subChapterAlpha = it.groups[3]?.value
+            val addition = checkForDecimal(subChapterDecimal, subChapterAlpha)
+            chapter.chapter_number = initial.plus(addition)
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Check for decimal in received strings
+     * @param decimal decimal value of regex
+     * @param alpha alpha value of regex
+     * @return decimal/alpha float value
+     */
+    fun checkForDecimal(decimal: String?, alpha: String?): Float {
+        if (!decimal.isNullOrEmpty())
+            return decimal?.toFloat()!!
+
+        if (!alpha.isNullOrEmpty()) {
+            if (alpha!!.contains("extra"))
+                return .99f
+
+            if (alpha.contains("omake"))
+                return .98f
+
+            if (alpha.contains("special"))
+                return .97f
+
+            if (alpha[0].equals('.') ) {
+                // Take value after (.)
+                return parseAlphaPostFix(alpha[1])
+            } else {
+                return parseAlphaPostFix(alpha[0])
+            }
+        }
+
+        return .0f
+    }
+
+    /**
+     * x.a -> x.1, x.b -> x.2, etc
+     */
+    private fun parseAlphaPostFix(alpha: Char): Float {
+        return ("0." + Integer.toString(alpha.toInt() - 96)).toFloat()
+    }
+
+}
diff --git a/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.java b/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.java
deleted file mode 100644
index 6235e298dc..0000000000
--- a/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.java
+++ /dev/null
@@ -1,198 +0,0 @@
-package eu.kanade.tachiyomi;
-
-import org.junit.Before;
-import org.junit.Test;
-
-import eu.kanade.tachiyomi.data.database.models.Chapter;
-import eu.kanade.tachiyomi.data.database.models.Manga;
-import eu.kanade.tachiyomi.util.ChapterRecognition;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-
-public class ChapterRecognitionTest {
-
-    Manga randomManga;
-
-    private Chapter createChapter(String title) {
-        Chapter chapter = Chapter.create();
-        chapter.name = title;
-        return chapter;
-    }
-
-    @Before
-    public void setUp() {
-        randomManga = new Manga();
-        randomManga.title = "Something";
-    }
-
-    @Test
-    public void testWithOneDigit() {
-        Chapter c = createChapter("Ch.3: Self-proclaimed Genius");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(3f);
-    }
-
-    @Test
-    public void testWithVolumeBefore() {
-        Chapter c = createChapter("Vol.1 Ch.4: Misrepresentation");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(4f);
-    }
-
-    @Test
-    public void testWithVolumeAndVersionNumber() {
-        Chapter c = createChapter("Vol.1 Ch.3 (v2) Read Online");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(3f);
-    }
-
-    @Test
-    public void testWithVolumeAndNumberInTitle() {
-        Chapter c = createChapter("Vol.15 Ch.90: Here Blooms the Daylily, Part 4");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(90f);
-    }
-
-    @Test
-    public void testWithVolumeAndSpecialChapter() {
-        Chapter c = createChapter("Vol.10 Ch.42.5: Homecoming (Beginning)");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(42.5f);
-    }
-
-    @Test
-    public void testWithJustANumber() {
-        Chapter c = createChapter("Homecoming (Beginning) 42");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(42f);
-    }
-
-    @Test
-    public void testWithJustASpecialChapter() {
-        Chapter c = createChapter("Homecoming (Beginning) 42.5");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(42.5f);
-    }
-
-    @Test
-    public void testWithNumberinMangaTitle() {
-        Chapter c = createChapter("3x3 Eyes 96");
-        Manga m = new Manga();
-        m.title = "3x3 Eyes";
-        ChapterRecognition.parseChapterNumber(c, m);
-        assertThat(c.chapter_number).isEqualTo(96f);
-    }
-
-    @Test
-    public void testWithColonAtTheEnd() {
-        Chapter c = createChapter("Chapter 5: 365 days");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(5f);
-    }
-
-    @Test
-    public void testWithZeros() {
-        Chapter c = createChapter("Vol.001 Ch.003: Kaguya Doesn't Know Much");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(3f);
-    }
-
-    @Test
-    public void testRange() {
-        Chapter c = createChapter("Ch.191-200 Read Online");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(191f);
-    }
-
-    @Test
-    public void testWithKeywordChAtTheEndOfTheManga() {
-        // It should be 567, not 67 (ch is a keyword to get the chapter number)
-        Chapter c = createChapter("Bleach 567: Down With Snowwhite");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(567f);
-    }
-
-    @Test
-    public void testWithVersionBefore() {
-        // It should be 84, not 2084
-        Chapter c = createChapter("Onepunch-Man Punch Ver002 084 : Creeping Darkness");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(84f);
-    }
-
-    @Test
-    public void testWithVersionBeforeAndAnotherNumber() {
-        Chapter c = createChapter("Onepunch-Man Punch Ver002 086 : Creeping Darkness [3]");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(86f);
-    }
-
-    @Test
-    public void testWithVolumeAfterChapter() {
-        Chapter c = createChapter("Solanin 028 Vol. 2");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(28f);
-    }
-
-    @Test
-    public void testWithVolumeAttachedToChapter() {
-        Chapter c = createChapter("Ansatsu Kyoushitsu 011v002: Assembly Time");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(11f);
-    }
-
-    @Test
-    public void testWithNumberInChapterTitle() {
-        Chapter c = createChapter("Ansatsu Kyoushitsu 099 Present Time - 2nd Hour");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(99f);
-    }
-
-    @Test
-    public void testAlphaSubChapters() {
-        Chapter c = createChapter("Asu No Yoichi 19a");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(19.1f);
-        c = createChapter("Asu No Yoichi 19b");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(19.2f);
-    }
-
-    @Test
-    public void testChapterWithArcNumber() {
-        Chapter c = createChapter("Manga title 123 - Vol 016 Arc title 002");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(123f);
-    }
-
-    @Test
-    public void testChapterWithChapterPrefixAfterPart() {
-        Chapter c = createChapter("Tokyo ESP 027: Part 002: Chapter 001");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(027f);
-    }
-
-    @Test
-    public void testUnparsable() {
-        Chapter c = createChapter("Foo");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(-1f);
-    }
-
-    @Test
-    public void testChapterWithTime() {
-        Chapter c = createChapter("Fairy Tail 404: 00:00");
-        ChapterRecognition.parseChapterNumber(c, randomManga);
-        assertThat(c.chapter_number).isEqualTo(404f);
-    }
-
-    @Test
-    public void testPlainNumberInTitle() {
-        Chapter c = createChapter("Kuroko no Basket 002 Monday at 840 on the Rooftop");
-        Manga manga = new Manga();
-        manga.title = "Kuroko no Basket";
-        ChapterRecognition.parseChapterNumber(c, manga);
-        assertThat(c.chapter_number).isEqualTo(2f);
-    }
-}
diff --git a/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.kt b/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.kt
new file mode 100644
index 0000000000..ef4dc35dad
--- /dev/null
+++ b/app/src/test/java/eu/kanade/tachiyomi/ChapterRecognitionTest.kt
@@ -0,0 +1,421 @@
+package eu.kanade.tachiyomi
+
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.util.ChapterRecognition
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.Before
+import org.junit.Test
+
+class ChapterRecognitionTest {
+    /**
+     * The manga containing manga title
+     */
+    lateinit var manga: Manga
+
+    /**
+     * The chapter containing chapter name
+     */
+    lateinit var chapter: Chapter
+
+    /**
+     * Set chapter title
+     * @param name name of chapter
+     * @return chapter object
+     */
+    private fun createChapter(name: String): Chapter {
+        chapter = Chapter.create()
+        chapter.name = name
+        return chapter
+    }
+
+    /**
+     * Set manga title
+     * @param title title of manga
+     * @return manga object
+     */
+    private fun createManga(title: String): Manga {
+        manga.title = title
+        return manga
+    }
+
+    /**
+     * Called before test
+     */
+    @Before fun setup() {
+        manga = Manga().apply { title = "random" }
+        chapter = Chapter.create()
+    }
+
+    /**
+     * Ch.xx base case
+     */
+    @Test fun ChCaseBase() {
+        createManga("Mokushiroku Alice")
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4f)
+    }
+
+    /**
+     * Ch.xx.x base case
+     */
+    @Test fun ChCaseDecimal() {
+        createManga("Mokushiroku Alice")
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4.1: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4.1f)
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4.4: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4.4f)
+    }
+
+    /**
+     * Ch.xx.a base case
+     */
+    @Test fun ChCaseAlpha() {
+        createManga("Mokushiroku Alice")
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4.a: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4.1f)
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4.b: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4.2f)
+
+        createChapter("Mokushiroku Alice Vol.1 Ch.4.extra: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4.99f)
+    }
+
+    /**
+     * Name containing one number base case
+     */
+    @Test fun OneNumberCaseBase() {
+        createManga("Bleach")
+
+        createChapter("Bleach 567 Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567f)
+    }
+
+    /**
+     * Name containing one number and decimal case
+     */
+    @Test fun OneNumberCaseDecimal() {
+        createManga("Bleach")
+
+        createChapter("Bleach 567.1 Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567.1f)
+
+        createChapter("Bleach 567.4 Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567.4f)
+    }
+
+    /**
+     * Name containing one number and alpha case
+     */
+    @Test fun OneNumberCaseAlpha() {
+        createManga("Bleach")
+
+        createChapter("Bleach 567.a Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567.1f)
+
+        createChapter("Bleach 567.b Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567.2f)
+
+        createChapter("Bleach 567.extra Down With Snowwhite")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(567.99f)
+    }
+
+    /**
+     * Chapter containing manga title and number base case
+     */
+    @Test fun MangaTitleCaseBase() {
+        createManga("Solanin")
+
+        createChapter("Solanin 028 Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28f)
+    }
+
+    /**
+     * Chapter containing manga title and number decimal case
+     */
+    @Test fun MangaTitleCaseDecimal() {
+        createManga("Solanin")
+
+        createChapter("Solanin 028.1 Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.1f)
+
+        createChapter("Solanin 028.4 Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.4f)
+    }
+
+    /**
+     * Chapter containing manga title and number alpha case
+     */
+    @Test fun MangaTitleCaseAlpha() {
+        createManga("Solanin")
+
+        createChapter("Solanin 028.a Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.1f)
+
+        createChapter("Solanin 028.b Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.2f)
+
+        createChapter("Solanin 028.extra Vol. 2")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.99f)
+    }
+
+    /**
+     * Extreme base case
+     */
+    @Test fun ExtremeCaseBase() {
+        createManga("Onepunch-Man")
+
+        createChapter("Onepunch-Man Punch Ver002 028")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28f)
+    }
+
+    /**
+     * Extreme base case decimal
+     */
+    @Test fun ExtremeCaseDecimal() {
+        createManga("Onepunch-Man")
+
+        createChapter("Onepunch-Man Punch Ver002 028.1")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.1f)
+
+        createChapter("Onepunch-Man Punch Ver002 028.4")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.4f)
+    }
+
+    /**
+     * Extreme base case alpha
+     */
+    @Test fun ExtremeCaseAlpha() {
+        createManga("Onepunch-Man")
+
+        createChapter("Onepunch-Man Punch Ver002 028.a")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.1f)
+
+        createChapter("Onepunch-Man Punch Ver002 028.b")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.2f)
+
+        createChapter("Onepunch-Man Punch Ver002 028.extra")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(28.99f)
+    }
+
+    /**
+     * Chapter containing .v2
+     */
+    @Test fun dotV2Case() {
+        createChapter("Vol.1 Ch.5v.2: Alones")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(5f)
+    }
+
+    /**
+     * Check for case with number in manga title
+     */
+    @Test fun numberInMangaTitleCase() {
+        createManga("Ayame 14")
+        createChapter("Ayame 14 1 - The summer of 14")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(1f)
+    }
+
+    /**
+     * Case with space between ch. x
+     */
+    @Test fun spaceAfterChapterCase() {
+        createManga("Mokushiroku Alice")
+        createChapter("Mokushiroku Alice Vol.1 Ch. 4: Misrepresentation")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(4f)
+    }
+
+    /**
+     * Chapter containing mar(ch)
+     */
+    @Test fun marchInChapterCase() {
+        createManga("Ayame 14")
+        createChapter("Vol.1 Ch.1: March 25 (First Day Cohabiting)")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(1f)
+    }
+
+    /**
+     * Chapter containing range
+     */
+    @Test fun rangeInChapterCase() {
+        createChapter("Ch.191-200 Read Online")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(191f)
+    }
+
+    /**
+     * Chapter containing multiple zeros
+     */
+    @Test fun multipleZerosCase() {
+        createChapter("Vol.001 Ch.003: Kaguya Doesn't Know Much")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(3f)
+    }
+
+    /**
+     * Chapter with version before number
+     */
+    @Test fun chapterBeforeNumberCase() {
+        createManga("Onepunch-Man")
+        createChapter("Onepunch-Man Punch Ver002 086 : Creeping Darkness [3]")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(86f)
+    }
+
+    /**
+     * Case with version attached to chapter number
+     */
+    @Test fun vAttachedToChapterCase() {
+        createManga("Ansatsu Kyoushitsu")
+        createChapter("Ansatsu Kyoushitsu 011v002: Assembly Time")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(11f)
+    }
+
+    /**
+     * Case where the chapter title contains the chapter
+     * But wait it's not actual the chapter number.
+     */
+    @Test fun NumberAfterMangaTitleWithChapterInChapterTitleCase() {
+        createChapter("Tokyo ESP 027: Part 002: Chapter 001")
+        createManga("Tokyo ESP")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(027f)
+    }
+
+    /**
+     * unParsable chapter
+     */
+    @Test fun unParsableCase() {
+        createChapter("Foo")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(-1f)
+    }
+
+    /**
+     * chapter with time in title
+     */
+    @Test fun timeChapterCase() {
+        createChapter("Fairy Tail 404: 00:00")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404f)
+    }
+
+    /**
+     * chapter with alpha without dot
+     */
+    @Test fun alphaWithoutDotCase() {
+        createChapter("Asu No Yoichi 19a")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(19.1f)
+    }
+
+    /**
+     * Chapter title containing extra and vol
+     */
+    @Test fun chapterContainingExtraCase() {
+        createManga("Fairy Tail")
+
+        createChapter("Fairy Tail 404.extravol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.99f)
+
+        createChapter("Fairy Tail 404 extravol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.99f)
+
+        createChapter("Fairy Tail 404.evol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.5f)
+    }
+
+    /**
+     * Chapter title containing omake (japanese extra) and vol
+     */
+    @Test fun chapterContainingOmakeCase() {
+        createManga("Fairy Tail")
+
+        createChapter("Fairy Tail 404.omakevol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.98f)
+
+        createChapter("Fairy Tail 404 omakevol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.98f)
+
+        createChapter("Fairy Tail 404.ovol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.15f)
+    }
+
+    /**
+     * Chapter title containing special and vol
+     */
+    @Test fun chapterContainingSpecialCase() {
+        createManga("Fairy Tail")
+
+        createChapter("Fairy Tail 404.specialvol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.97f)
+
+        createChapter("Fairy Tail 404 specialvol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.97f)
+
+        createChapter("Fairy Tail 404.svol002")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(404.19f)
+    }
+
+    /**
+     * Chapter title containing comma's
+     */
+    @Test fun chapterContainingCommasCase() {
+        createManga("One Piece")
+
+        createChapter("One Piece 300,a")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(300.1f)
+
+        createChapter("One Piece Ch,123,extra")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(123.99f)
+
+        createChapter("One Piece the sunny, goes swimming 024,005")
+        ChapterRecognition.parseChapterNumber(chapter, manga)
+        assertThat(chapter.chapter_number).isEqualTo(24.005f)
+    }
+
+}