1 files changed, 66 insertions, 0 deletions
diff --git a/tests/test-bdiff.py b/tests/test-bdiff.py
new file mode 100644
index 0000000..c17dfb0
--- /dev/null
+++ b/tests/test-bdiff.py
@@ -0,0 +1,66 @@
+import struct
+from mercurial import bdiff, mpatch
+
+def test1(a, b):
+    d = bdiff.bdiff(a, b)
+    c = a
+    if d:
+        c = mpatch.patches(a, [d])
+    if c != b:
+        print "***", repr(a), repr(b)
+        print "bad:"
+        print repr(c)[:200]
+        print repr(d)
+
+def test(a, b):
+    print "***", repr(a), repr(b)
+    test1(a, b)
+    test1(b, a)
+
+test("a\nc\n\n\n\n", "a\nb\n\n\n")
+test("a\nb\nc\n", "a\nc\n")
+test("", "")
+test("a\nb\nc", "a\nb\nc")
+test("a\nb\nc\nd\n", "a\nd\n")
+test("a\nb\nc\nd\n", "a\nc\ne\n")
+test("a\nb\nc\n", "a\nc\n")
+test("a\n", "c\na\nb\n")
+test("a\n", "")
+test("a\n", "b\nc\n")
+test("a\n", "c\na\n")
+test("", "adjfkjdjksdhfksj")
+test("", "ab")
+test("", "abc")
+test("a", "a")
+test("ab", "ab")
+test("abc", "abc")
+test("a\n", "a\n")
+test("a\nb", "a\nb")
+
+#issue1295
+def showdiff(a, b):
+    bin = bdiff.bdiff(a, b)
+    pos = 0
+    while pos < len(bin):
+        p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
+        pos += 12
+        print p1, p2, repr(bin[pos:pos + l])
+        pos += l
+showdiff("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\nx\n\nz\n")
+showdiff("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\ny\n\nx\n\nz\n")
+
+print "done"
+
+def testfixws(a, b, allws):
+    c = bdiff.fixws(a, allws)
+    if c != b:
+        print "*** fixws", repr(a), repr(b), allws
+        print "got:"
+        print repr(c)
+
+testfixws(" \ta\r b\t\n", "ab\n", 1)
+testfixws(" \ta\r b\t\n", " a b\n", 0)
+testfixws("", "", 1)
+testfixws("", "", 0)
+
+print "done"