fix issue where first comment above import is duplicated (#36)

src/main/java/net/revelc/code/impsort/ImpSort.java

@@ -136,7 +136,9 @@ public Result parseFile(final Path path) throws IOException {
         Stream.concat(orphanedComments, importDeclarations.stream()).collect(Collectors.toList());
     importSectionNodes.sort(BY_POSITION);
     // position line numbers start at 1, not 0
-    int start = importSectionNodes.get(0).getBegin().get().line - 1;
+    Node firstImport = importSectionNodes.get(0);
+    int start = firstImport.getComment().map(c -> c.getBegin().get())
+        .orElse(firstImport.getBegin().get()).line - 1;
     int stop = importSectionNodes.get(importSectionNodes.size() - 1).getEnd().get().line;
     // get the original import section lines from the file
     // include surrounding whitespace

src/test/java/net/revelc/code/impsort/ImpSortTest.java

@@ -28,6 +28,7 @@
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Optional;
 import java.util.Set;
 import java.util.TreeSet;
@@ -159,7 +160,7 @@ public void testIso8859ForIssue3() throws IOException {
         new ImpSort(StandardCharsets.ISO_8859_1, eclipseDefaults, true, true, LineEnding.AUTO)
             .parseFile(p);
     assertTrue(result.getImports().isEmpty());
-    Path output = File.createTempFile("impSort", null).toPath();
+    Path output = File.createTempFile("impSortIso8859", null, new File("target")).toPath();
     result.saveSorted(output);
     byte[] testData = Files.readAllBytes(p);
     // ensure expected ISO_8859_1 byte is present in test data, this defends against file being
@@ -201,4 +202,20 @@ public void testRemoveSamePackageImports() {
     assertTrue(imports.stream().anyMatch(imp -> "abcd.ef.Blah.Blah".equals(imp.getImport())));
     assertTrue(imports.stream().anyMatch(imp -> "abcd.efg.Blah2".equals(imp.getImport())));
   }
+
+  @Test
+  public void testResultStartWithComment() throws IOException {
+    Path p =
+            Paths.get(System.getProperty("user.dir"), "src", "test", "resources", "FirstImportComment.java");
+    Result result =
+            new ImpSort(StandardCharsets.UTF_8, eclipseDefaults, true, true, LineEnding.AUTO)
+                    .parseFile(p);
+
+    Path output = File.createTempFile("impSortComment", null, new File("target")).toPath();
+    result.saveSorted(output);
+
+    List<String> lines = Files.readAllLines(output);
+    assertEquals(1, lines.stream().filter(line -> line.equals(" * Some comment")).count());
+  }
 }
+

src/test/resources/FirstImportComment.java

@@ -0,0 +1,25 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Some comment
+ *
+ */
+import java.lang.Math;
+
+class TestClass{
+  TestClass() {
+    int foo = Math.abs(1);
+  }
+}