1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/annotate-snippets/tests/diff/mod.rs b/vendor/annotate-snippets/tests/diff/mod.rs
new file mode 100644
index 000000000..576c6c4d6
--- /dev/null
+++ b/vendor/annotate-snippets/tests/diff/mod.rs
@@ -0,0 +1,43 @@
+use difference::{Changeset, Difference};
+use yansi_term::Color::{Black, Green, Red};
+
+pub fn get_diff(left: &str, right: &str) -> String {
+    let mut output = String::new();
+
+    let Changeset { diffs, .. } = Changeset::new(left, right, "\n");
+
+    for i in 0..diffs.len() {
+        match diffs[i] {
+            Difference::Same(ref x) => {
+                output += &format!(" {}\n", x);
+            }
+            Difference::Add(ref x) => {
+                match diffs[i - 1] {
+                    Difference::Rem(ref y) => {
+                        output += &format!("{}", Green.paint("+"));
+                        let Changeset { diffs, .. } = Changeset::new(y, x, " ");
+                        for c in diffs {
+                            match c {
+                                Difference::Same(ref z) => {
+                                    output += &format!("{} ", Green.paint(z.as_str()));
+                                }
+                                Difference::Add(ref z) => {
+                                    output += &format!("{} ", Black.on(Green).paint(z.as_str()));
+                                }
+                                _ => (),
+                            }
+                        }
+                        output += "\n";
+                    }
+                    _ => {
+                        output += &format!("+{}\n", Green.paint(x.as_str()));
+                    }
+                };
+            }
+            Difference::Rem(ref x) => {
+                output += &format!("-{}\n", Red.paint(x.as_str()));
+            }
+        }
+    }
+    output
+}