1 files changed, 32 insertions, 0 deletions
diff --git a/tests/test-diff.cpp b/tests/test-diff.cpp
index 1625716..d09c58e 100644
--- a/tests/test-diff.cpp
+++ b/tests/test-diff.cpp
@@ -147,6 +147,38 @@ TEST_F(DiffTest, constructor)
   Diff d{"baaaab", "baab"};
   EXPECT_EQ(d.get_xml(), "<diff><start>1</start><end>3</end><data/></diff>");
  }
+ {
+  Diff d{"baaaab", "baaaaaaab"};
+  EXPECT_EQ(d.get_xml(), "<diff><start>1</start><end>1</end><data>aaa</data></diff>");
+ }
+}
+
+TEST_F(DiffTest, empty)
+{
+ {
+  Diff d;
+  EXPECT_TRUE(d.empty());
+ }
+
+ {
+  Diff d{"<diff><start>1</start><end>3</end><data/></diff>"};
+  EXPECT_FALSE(d.empty());
+ }
+ 
+ {
+  Diff d{"<diff><start>1</start><end>1</end><data/></diff>"};
+  EXPECT_TRUE(d.empty());
+ }
+ 
+ {
+  Diff d{"<diff><start>1</start><end>1</end><data>abc</data></diff>"};
+  EXPECT_FALSE(d.empty());
+ }
+
+ {
+  Diff d{"<diff><start>0</start><end>0</end><data/></diff>"};
+  EXPECT_TRUE(d.empty());
+ }
 }
 
 TEST_F(DiffTest, diff_create)