Add more tests for LaTeX to unicode conversion

src/test/java/net/sf/jabref/logic/layout/format/LatexToUnicodeFormatterTest.java

@@ -65,6 +65,39 @@ public void testSWithCaron() {
         assertEquals("Š", formatter.format("{\\v{S}}"));
     }
 
+    @Test
+    public void testIWithDiaresis() {
+        assertEquals("ï", formatter.format("\\\"{i}"));
+    }
+
+    @Test
+    public void testIWithDiaresisAndEscapedI() {
+        // this might look strange in the test, but is actually a correct translation and renders identically to the above example in the UI
+        assertEquals("ı̈", formatter.format("\\\"{\\i}"));
+    }
+
+
+    @Test
+    public void testIWithDiaresisAndUnnecessaryBraces() {
+        assertEquals("ï", formatter.format("{\\\"{i}}"));
+    }
+
+    @Test
+    public void testUpperCaseIWithDiaresis() {
+        assertEquals("Ï", formatter.format("\\\"{I}"));
+    }
+
+    @Test
+    public void testPolishName() {
+        assertEquals("Łęski", formatter.format("\\L\\k{e}ski"));
+    }
+
+
+    @Test
+    public void testDoubleCombiningAccents() {
+        assertEquals("ώ", formatter.format("$\\acute{\\omega}$"));
+    }
+
     @Test
     public void testCombiningAccentsCase1() {
         assertEquals("ḩ", formatter.format("{\\c{h}}"));