Add GapBuffer::erase()

test/src/test_GapBuffer.cc

@@ -43,6 +43,35 @@ TEST(GapBufferTest, allows_inserting)
     EXPECT_EQ(8u, gp.size());
 }
 
+TEST(GapBufferTest, allows_deleting)
+{
+    GapBuffer gp;
+
+    gp.insert(0u, (const uint8_t *)"test_123", 8u);
+    EXPECT_EQ(8u, gp.size());
+    EXPECT_EQ("test_123", gp.get_string());
+
+    gp.erase(6u, 2u);
+    EXPECT_EQ(6u, gp.size());
+    EXPECT_EQ("test_1", gp.get_string());
+
+    gp.insert(4u, (const uint8_t *)"!@#$", 4u);
+    EXPECT_EQ(10u, gp.size());
+    EXPECT_EQ("test!@#$_1", gp.get_string());
+
+    gp.erase(4u, 4u);
+    EXPECT_EQ(6u, gp.size());
+    EXPECT_EQ("test_1", gp.get_string());
+
+    gp.insert(4u, (const uint8_t *)"^&", 2u);
+    EXPECT_EQ(8u, gp.size());
+    EXPECT_EQ("test^&_1", gp.get_string());
+
+    gp.erase(2u, 5u);
+    EXPECT_EQ(3u, gp.size());
+    EXPECT_EQ("te1", gp.get_string());
+}
+
 TEST(GapBufferTest, allocates_more_memory_and_copies_buffer_contents_when_needed)
 {
     GapBuffer gp;