github-yangbo
diff --git a/‎test/testcase/diffutils/DiffRowGeneratorTest.java
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+68Lines changed: 68 additions & 0 deletions b/‎test/testcase/diffutils/DiffRowGeneratorTest.java
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+68Lines changed: 68 additions & 0 deletions
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+package diffutils;
+
+import java.util.Arrays;
+import java.util.List;
+
+import difflib.DiffRow;
+import difflib.DiffRowGenerator;
+
+import junit.framework.TestCase;
+
+public class DiffRowGeneratorTest  extends TestCase {
+
+    public void testGenerator_Default() {
+        String first = "anything \n \nother";
+        String second ="anything\n\nother";
+
+        DiffRowGenerator generator = new DiffRowGenerator.Builder()
+            .columnWidth(Integer.MAX_VALUE) // do not wrap
+            .build();
+        List<DiffRow> rows = generator.generateDiffRows(split(first), split(second));
+        print(rows);
+
+        assertEquals(3, rows.size());
+    }
+
+    public void testGenerator_InlineDiff() {
+        String first = "anything \n \nother";
+        String second ="anything\n\nother";
+
+        DiffRowGenerator generator = new DiffRowGenerator.Builder()
+            .showInlineDiffs(true)
+            .columnWidth(Integer.MAX_VALUE) // do not wrap
+            .build();
+        List<DiffRow> rows = generator.generateDiffRows(split(first), split(second));
+        print(rows);
+
+        assertEquals(3, rows.size());
+        assertTrue(rows.get(0).getOldLine().indexOf("<span") > 0);
+    }
+
+    public void testGenerator_IgnoreWhitespaces() {
+        String first = "anything \n \nother\nmore lines";
+        String second ="anything\n\nother\nsome more lines";
+
+        DiffRowGenerator generator = new DiffRowGenerator.Builder()
+            .ignoreWhiteSpaces(true)
+            .columnWidth(Integer.MAX_VALUE) // do not wrap
+            .build();
+        List<DiffRow> rows = generator.generateDiffRows(split(first), split(second));
+        print(rows);
+
+        assertEquals(4, rows.size());
+        assertEquals(rows.get(0).getTag(), DiffRow.Tag.EQUAL);
+        assertEquals(rows.get(1).getTag(), DiffRow.Tag.EQUAL);
+        assertEquals(rows.get(2).getTag(), DiffRow.Tag.EQUAL);
+        assertEquals(rows.get(3).getTag(), DiffRow.Tag.CHANGE);
+    }
+
+    private List<String> split(String content) {
+        return Arrays.asList(content.split("\n"));
+    }
+
+    private void print(List<DiffRow> diffRows) {
+        for (DiffRow row: diffRows) {
+            System.out.println(row);
+        }
+    }
+}