Add simple unit tests

src/test/java/org/jabref/logic/formatter/casechanger/CapitalizeFormatterTest.java

@@ -2,6 +2,8 @@
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -28,4 +30,27 @@ public void test() {
     public void formatExample() {
         assertEquals("I Have {a} Dream", formatter.format(formatter.getExampleInput()));
     }
+
+    @ParameterizedTest(name = "input={0}, formattedStr={1}")
+    @CsvSource({
+            "{}, {}", // {}
+            "{upper, {upper", // unmatched braces
+            "upper, Upper", // single word lower case
+            "Upper, Upper", // single word correct
+            "UPPER, Upper", // single word upper case
+            "upper each first, Upper Each First", // multiple words lower case
+            "Upper Each First, Upper Each First", // multiple words correct
+            "UPPER EACH FIRST, Upper Each First", // multiple words upper case
+            "{u}pp{e}r, {u}pp{e}r", // single word lower case with {}
+            "{U}pp{e}r, {U}pp{e}r", // single word correct with {}
+            "{U}PP{E}R, {U}pp{E}r", // single word upper case with {}
+            "upper each {NOT} first, Upper Each {NOT} First", // multiple words lower case with {}
+            "Upper {E}ach {NOT} First, Upper {E}ach {NOT} First", // multiple words correct with {}
+            "UPPER {E}ACH {NOT} FIRST, Upper {E}ach {NOT} First", // multiple words upper case with {}
+
+    })
+    public void testInputs(String input, String expectedResult) {
+        String formattedStr = formatter.format(input);
+        assertEquals(expectedResult, formattedStr);
+    }
 }

src/test/java/org/jabref/logic/integrity/ASCIICharacterCheckerTest.java

@@ -33,4 +33,21 @@ void fieldDoesNotAcceptUnicode() {
         assertEquals(List.of(new IntegrityMessage("Non-ASCII encoded character found", entry, StandardField.AUTHOR)), checker.check(entry));
     }
 
+    @Test
+    void fieldAcceptsOnlyAsciiCharacters() {
+        String field = "";
+        for (int i = 32; i <= 127; i++) {
+            field += Character.toString(i);
+        }
+        entry.setField(StandardField.TITLE, field);
+        assertEquals(Collections.emptyList(), checker.check(entry));
+    }
+
+    @Test
+    void fieldDoesNotAcceptNonAsciiCharacters() {
+        String field = Character.toString(31) + Character.toString(128);
+        entry.setField(StandardField.TITLE, field);
+        assertEquals(List.of(new IntegrityMessage("Non-ASCII encoded character found", entry, StandardField.TITLE)), checker.check(entry));
+    }
+
 }

src/test/java/org/jabref/logic/integrity/YearCheckerTest.java

@@ -85,4 +85,9 @@ void yearFieldDoesNotRemoveStringInsideBraceAndPercentage() {
     void yearFieldDoesNotRemoveStringBeforeSpecialCharacters() {
         assertNotEquals(Optional.empty(), checker.checkValue("1986a(){},.;!?<>%&$"));
     }
+
+    @Test
+    void testEmptyValue() {
+        assertEquals(Optional.empty(), checker.checkValue(""));
+    }
 }

src/test/java/org/jabref/logic/layout/format/AuthorsTest.java

@@ -3,6 +3,8 @@
 import org.jabref.logic.layout.ParamLayoutFormatter;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -154,4 +156,70 @@ public void testEmptyEtAl() {
         assertEquals("Bruce, Bob Croydon",
                 a.format("Bob Croydon Bruce and Charles Manson and Jolly Jumper and Chuck Chuckles"));
     }
+
+    @ParameterizedTest(name = "arg={0}, formattedStr={1}")
+    @CsvSource({
+            "FirstFirst, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // FirstFirst
+            "LastFirst, 'Bruce, B. C., Manson, C., Jumper, J. and Chuckles, C.'", // LastFirst
+            "LastFirstFirstFirst, 'Bruce, B. C., C. Manson, J. Jumper and C. Chuckles'" // LastFirstFirstFirst
+    })
+    public void testAuthorOrder(String arg, String expectedResult) {
+        ParamLayoutFormatter a = new Authors();
+        a.setArgument(arg);
+        String formattedStr = a.format("Bob Croydon Bruce and Charles Manson and Jolly Jumper and Chuck Chuckles");
+        assertEquals(expectedResult, formattedStr);
+    }
+
+    @ParameterizedTest(name = "arg={0}, formattedStr={1}")
+    @CsvSource({
+            "FullName, 'Bob Croydon Bruce, Charles Manson, Jolly Jumper and Chuck Chuckles'", // FullName
+            "Initials, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // Initials
+            "FirstInitial, 'B. Bruce, C. Manson, J. Jumper and C. Chuckles'", // FirstInitial
+            "MiddleInitial, 'Bob C. Bruce, Charles Manson, Jolly Jumper and Chuck Chuckles'", // MiddleInitial
+            "LastName, 'Bruce, Manson, Jumper and Chuckles'", // LastName
+            "InitialsNoSpace, 'B.C. Bruce, C. Manson, J. Jumper and C. Chuckles'" // InitialsNoSpace
+    })
+    public void testAuthorABRV(String arg, String expectedResult) {
+        ParamLayoutFormatter a = new Authors();
+        a.setArgument(arg);
+        String formattedStr = a.format("Bob Croydon Bruce and Charles Manson and Jolly Jumper and Chuck Chuckles");
+        assertEquals(expectedResult, formattedStr);
+    }
+
+    @ParameterizedTest(name = "arg={0}, formattedStr={1}")
+    @CsvSource({
+            "FullPunc, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // FullPunc
+            "NoPunc, 'B C Bruce, C Manson, J Jumper and C Chuckles'", // NoPunc
+            "NoComma, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // NoComma
+            "NoPeriod, 'B C Bruce, C Manson, J Jumper and C Chuckles'" // NoPeriod
+    })
+    public void testAuthorPUNC(String arg, String expectedResult) {
+        ParamLayoutFormatter a = new Authors();
+        a.setArgument(arg);
+        String formattedStr = a.format("Bob Croydon Bruce and Charles Manson and Jolly Jumper and Chuck Chuckles");
+        assertEquals(expectedResult, formattedStr);
+    }
+
+    @ParameterizedTest(name = "arg={0}, formattedStr={1}")
+    @CsvSource({
+            "Comma, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // Comma
+            "And, 'B. C. Bruce and C. Manson and J. Jumper and C. Chuckles'", // And
+            "Colon, 'B. C. Bruce: C. Manson: J. Jumper and C. Chuckles'", // Colon
+            "Semicolon, 'B. C. Bruce; C. Manson; J. Jumper and C. Chuckles'", // Semicolon
+            "Oxford, 'B. C. Bruce, C. Manson, J. Jumper, and C. Chuckles'", // Oxford
+            "Amp, 'B. C. Bruce, C. Manson, J. Jumper & C. Chuckles'", // Amp
+            "Sep, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // Sep
+            "LastSep, 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // LastSep
+            "Sep=|, 'B. C. Bruce|C. Manson|J. Jumper and C. Chuckles'", // Custom Sep
+            "LastSep=|, 'B. C. Bruce, C. Manson, J. Jumper|C. Chuckles'", // Custom LastSep
+            "'Comma, And', 'B. C. Bruce, C. Manson, J. Jumper and C. Chuckles'", // Comma And
+            "'Comma, Colon', 'B. C. Bruce, C. Manson, J. Jumper: C. Chuckles'", // Comma Colon
+            "'Comma, Semicolon', 'B. C. Bruce, C. Manson, J. Jumper; C. Chuckles'", // Comma Semicolon
+    })
+    public void testAuthorSEPARATORS(String arg, String expectedResult) {
+        ParamLayoutFormatter a = new Authors();
+        a.setArgument(arg);
+        String formattedStr = a.format("Bob Croydon Bruce and Charles Manson and Jolly Jumper and Chuck Chuckles");
+        assertEquals(expectedResult, formattedStr);
+    }
 }

src/test/java/org/jabref/logic/layout/format/DateFormatterTest.java

@@ -4,6 +4,8 @@
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -26,4 +28,18 @@ public void testRequestedFormat() {
         formatter.setArgument("MM/yyyy");
         assertEquals("07/2016", formatter.format("2016-07-15"));
     }
+
+    @ParameterizedTest(name = "formatArg={0}, input={1}, formattedStr={2}")
+    @CsvSource({
+            "MM/dd/yyyy, 2016-07-15, 07/15/2016", // MM/dd/yyyy
+            "dd MMMM yyyy, 2016-07-15, 15 July 2016", // dd MMMM yyyy
+            "MM-dd-yyyy, 2016-07-15, 07-15-2016", // MM-dd-yyyy
+            "yyyy.MM.dd, 2016-07-15, 2016.07.15", // yyyy.MM.dd
+            "yyyy/MM, 2016-07-15, 2016/07", // yyyy/MM
+    })
+    public void testOtherFormats(String formatArg, String input, String expectedResult) {
+        formatter.setArgument(formatArg);
+        String formattedStr = formatter.format(input);
+        assertEquals(expectedResult, formattedStr);
+    }
 }

src/test/java/org/jabref/logic/layout/format/RTFCharsTest.java

@@ -5,6 +5,8 @@
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -128,6 +130,60 @@ void testSpecialCharacters() {
         assertEquals("\\u182P", formatter.format("{\\P}")); // ¶
         assertEquals("\\u169?", formatter.format("{\\copyright}")); // ©
         assertEquals("\\u163?", formatter.format("{\\pounds}")); // £
+
+    }
+
+    @ParameterizedTest(name = "specialChar={0}, formattedStr={1}")
+    @CsvSource({
+            "ÀÁÂÃÄĀĂĄ, \\u192A\\u193A\\u194A\\u195A\\u196A\\u256A\\u258A\\u260A", // A
+            "àáâãäåāăą, \\u224a\\u225a\\u226a\\u227a\\u228a\\u229a\\u257a\\u259a\\u261a", // a
+            "ÇĆĈĊČ, \\u199C\\u262C\\u264C\\u266C\\u268C", // C
+            "çćĉċč, \\u231c\\u263c\\u265c\\u267c\\u269c", // c
+            "ÐĐ, \\u208D\\u272D", // D
+            "ðđ, \\u240d\\u273d", // d
+            "ÈÉÊËĒĔĖĘĚ, \\u200E\\u201E\\u202E\\u203E\\u274E\\u276E\\u278E\\u280E\\u282E", // E
+            "èéêëēĕėęě, \\u232e\\u233e\\u234e\\u235e\\u275e\\u277e\\u279e\\u281e\\u283e", // e
+            "ĜĞĠĢŊ, \\u284G\\u286G\\u288G\\u290G\\u330G", // G
+            "ĝğġģŋ, \\u285g\\u287g\\u289g\\u291g\\u331g", // g
+            "ĤĦ, \\u292H\\u294H", // H
+            "ĥħ, \\u293h\\u295h", // h
+            "ÌÍÎÏĨĪĬĮİ, \\u204I\\u205I\\u206I\\u207I\\u296I\\u298I\\u300I\\u302I\\u304I", // I
+            "ìíîïĩīĭį, \\u236i\\u237i\\u238i\\u239i\\u297i\\u299i\\u301i\\u303i", // i
+            "Ĵ, \\u308J", // J
+            "ĵ, \\u309j", // j
+            "Ķ, \\u310K", // K
+            "ķ, \\u311k", // k
+            "ĹĻĿ, \\u313L\\u315L\\u319L", // L
+            "ĺļŀł, \\u314l\\u316l\\u320l\\u322l", // l
+            "ÑŃŅŇ, \\u209N\\u323N\\u325N\\u327N", // N
+            "ñńņň, \\u241n\\u324n\\u326n\\u328n", // n
+            "ÒÓÔÕÖØŌŎ, \\u210O\\u211O\\u212O\\u213O\\u214O\\u216O\\u332O\\u334O", // O
+            "òóôõöøōŏ, \\u242o\\u243o\\u244o\\u245o\\u246o\\u248o\\u333o\\u335o", // o
+            "ŔŖŘ, \\u340R\\u342R\\u344R", // R
+            "ŕŗř, \\u341r\\u343r\\u345r", // r
+            "ŚŜŞŠ, \\u346S\\u348S\\u350S\\u352S", // S
+            "śŝşš, \\u347s\\u349s\\u351s\\u353s", // s
+            "ŢŤŦ, \\u354T\\u356T\\u358T", // T
+            "ţŧ, \\u355t\\u359t", // t
+            "ÙÚÛÜŨŪŬŮŲ, \\u217U\\u218U\\u219U\\u220U\\u360U\\u362U\\u364U\\u366U\\u370U", // U
+            "ùúûũūŭůų, \\u249u\\u250u\\u251u\\u361u\\u363u\\u365u\\u367u\\u371u", // u
+            "Ŵ, \\u372W", // W
+            "ŵ, \\u373w", // w
+            "ŶŸÝ, \\u374Y\\u376Y\\u221Y", // Y
+            "ŷÿ, \\u375y\\u255y", // y
+            "ŹŻŽ, \\u377Z\\u379Z\\u381Z", // Z
+            "źżž, \\u378z\\u380z\\u382z", // z
+            "Æ, \\u198AE", // AE
+            "æ, \\u230ae", // ae
+            "Œ, \\u338OE", // OE
+            "œ, \\u339oe", // oe
+            "Þ, \\u222TH", // TH
+            "ß, \\u223ss", // ss
+            "¡, \\u161!" // !
+    })
+    public void testMoreSpecialCharacters(String specialChar, String expectedResult) {
+        String formattedStr = formatter.format(specialChar);
+        assertEquals(expectedResult, formattedStr);
     }
 
     @Test

src/test/java/org/jabref/logic/layout/format/RisMonthTest.java

@@ -1,6 +1,8 @@
 package org.jabref.logic.layout.format;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -16,9 +18,24 @@ public void testNull() {
         assertEquals("", new RisMonth().format(null));
     }
 
-    @Test
-    public void testMonth() {
-        assertEquals("12", new RisMonth().format("dec"));
+    @ParameterizedTest(name = "input={0}, formattedStr={1}")
+    @CsvSource({
+            "jan, 01", // jan
+            "feb, 02", // feb
+            "mar, 03", // mar
+            "apr, 04", // apr
+            "may, 05", // may
+            "jun, 06", // jun
+            "jul, 07", // jul
+            "aug, 08", // aug
+            "sep, 09", // sep
+            "oct, 10", // oct
+            "nov, 11", // nov
+            "dec, 12", // dec
+    })
+    public void testValidMonth(String input, String expectedResult) {
+        String formattedStr = new RisMonth().format(input);
+        assertEquals(expectedResult, formattedStr);
     }
 
     @Test

src/test/java/org/jabref/logic/util/strings/StringSimilarityTest.java

@@ -0,0 +1,30 @@
+package org.jabref.logic.util.strings;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class StringSimilarityTest {
+
+    private StringSimilarity similarityChecker = new StringSimilarity();
+
+    @ParameterizedTest(name = "a={0}, b={1}, result={2}")
+    @CsvSource({
+            "'', '', true", // same empty strings
+            "a, a, true", // same one-letter strings
+            "a, '', true", // one string is empty and similarity < threshold (4)
+            "'', a, true", // one string is empty and similarity < threshold (4)
+            "abcd, '', true", // one string is empty and similarity == threshold (4)
+            "'', abcd, true", // one string is empty and similarity == threshold (4)
+            "abcde, '', false", // one string is empty and similarity > threshold (4)
+            "'', abcde, false", // one string is empty and similarity > threshold (4)
+            "abcdef, abcdef, true", // same multi-letter strings
+            "abcdef, abc, true", // no empty strings and similarity < threshold (4)
+            "abcdef, ab, true", // no empty strings and similarity == threshold (4)
+            "abcdef, a, false" // no empty string sand similarity > threshold (4)
+    })
+    public void testStringSimilarity(String a, String b, String expectedResult) {
+        assertEquals(Boolean.valueOf(expectedResult), similarityChecker.isSimilar(a, b));
+    }
+}