Apply some IDE suggestions

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1919257 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/test/java/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

@@ -1875,6 +1875,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
         }
 
         // Try with one with the entities in the Content Types
+        //noinspection resource
         assertThrows(Exception.class, () -> XSSFTestDataSamples.openSamplePackage("54764-2.xlsx"),
             "Should fail as too much expansion occurs");
 
@@ -1943,6 +1944,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
 
         // Workbook Factory gives helpful error on file
         File xlsbFile = HSSFTestDataSamples.getSampleFile("Simple.xlsb");
+        //noinspection resource
         assertThrows(XLSBUnsupportedException.class, () -> WorkbookFactory.create(xlsbFile), ".xlsb files not supported");
     }
 
@@ -2292,7 +2294,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
 
             List<XSSFShape> shapes = drawing.getShapes();
             assertEquals(1, shapes.size());
-            assertTrue(shapes.get(0) instanceof XSSFSimpleShape);
+            assertInstanceOf(XSSFSimpleShape.class, shapes.get(0));
 
             XSSFSimpleShape shape = (XSSFSimpleShape) shapes.get(0);
 
@@ -2524,6 +2526,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
     }
 
     @Disabled("this test is only for manual verification, as we can't test if the cell is visible in Excel")
+    @Test
     void test51451() throws IOException {
         try (Workbook wb = new XSSFWorkbook()) {
             Sheet sh = wb.createSheet();
@@ -3302,6 +3305,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
     @Test
     void test64045() {
         File file = XSSFTestDataSamples.getSampleFile("xlsx-corrupted.xlsx");
+        //noinspection resource
         assertThrows(POIXMLException.class, () -> new XSSFWorkbook(file), "Should catch exception as the file is corrupted");
     }
 
@@ -3642,6 +3646,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
             IOException ie = assertThrows(IOException.class, () -> WorkbookFactory.create(fis));
             assertEquals("Can't open workbook - unsupported file type: XML", ie.getMessage());
         }
+        //noinspection resource
         IOException ie = assertThrows(IOException.class, () -> WorkbookFactory.create(file));
         assertEquals("Can't open workbook - unsupported file type: XML", ie.getMessage());
     }
@@ -3899,7 +3904,7 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
                 if (row != null) {
                     XSSFCell cellSymbol = row.getCell(0);
                     if (cellSymbol != null) {
-                        XSSFComment comment = cellSymbol.getCellComment();
+                        cellSymbol.getCellComment();
                     }
                 }
             }

poi/src/test/java/org/apache/poi/ss/usermodel/BaseTestBugzillaIssues.java

@@ -405,7 +405,7 @@ public abstract class BaseTestBugzillaIssues {
 //            assertTrue("Had zero length starting at length " + i, computeCellWidthFixed(font, b.toString()) > 0);
 //        }
             double widthManual = computeCellWidthManually(cell0, font);
-            double widthBeforeCell = SheetUtil.getCellWidth(cell0, 8, null, false);
+            double widthBeforeCell = SheetUtil.getCellWidth(cell0, 8.0f, null, false);
             double widthBeforeCol = SheetUtil.getColumnWidth(sheet, 0, false);
 
             String info = widthManual + "/" + widthBeforeCell + "/" + widthBeforeCol + "/" +
@@ -419,7 +419,7 @@ public abstract class BaseTestBugzillaIssues {
 
             double width = SheetUtil.getColumnWidth(sheet, 0, false);
             assertTrue(width > 0, "Expected to have column width > 0 AFTER auto-size, but had " + width);
-            width = SheetUtil.getCellWidth(cell0, 8, null, false);
+            width = SheetUtil.getCellWidth(cell0, 8.0f, null, false);
             assertTrue(width > 0, "Expected to have cell width > 0 AFTER auto-size, but had " + width);
 
             assertEquals(255 * 256, sheet.getColumnWidth(0)); // maximum column width is 255 characters
@@ -1156,7 +1156,7 @@ public abstract class BaseTestBugzillaIssues {
             // verify that null-values can be set, this was possible up to 3.11, but broken in 3.12
             cell.setCellValue((String) null);
             String value = cell.getStringCellValue();
-            assertTrue(value == null || value.length() == 0,
+            assertTrue(value == null || value.isEmpty(),
                 "HSSF will currently return empty string, XSSF/SXSSF will return null, but had: " + value);
 
             cell = row.createCell(1);
@@ -1166,7 +1166,7 @@ public abstract class BaseTestBugzillaIssues {
             wb.getCreationHelper().createFormulaEvaluator().evaluateAll();
 
             value = cell.getStringCellValue();
-            assertTrue(value == null || value.length() == 0,
+            assertTrue(value == null || value.isEmpty(),
                 "HSSF will currently return empty string, XSSF/SXSSF will return null, but had: " + value);
 
             // set some value
@@ -1178,7 +1178,7 @@ public abstract class BaseTestBugzillaIssues {
             // verify that the null-value is actually set even if there was some value in the cell before
             cell.setCellValue((String) null);
             value = cell.getStringCellValue();
-            assertTrue(value == null || value.length() == 0,
+            assertTrue(value == null || value.isEmpty(),
                 "HSSF will currently return empty string, XSSF/SXSSF will return null, but had: " + value);
         }
     }