Add quickcheck tests

mbrubeck · kwantam · commit 8547d198a26e · 2017-02-01T11:14:29.000-08:00
closes #13
diff --git a/Cargo.toml b/Cargo.toml
@@ -20,3 +20,6 @@ exclude = [ "target/*", "Cargo.lock", "scripts/tmp" ]
 
 [features]
 no_std = [] # This is a no-op, preserved for backward compatibility only.
+
+[dev-dependencies]
+quickcheck = "0.4"
diff --git a/src/lib.rs b/src/lib.rs
@@ -59,6 +59,10 @@
 #[macro_use]
 extern crate std;
 
+#[cfg(test)]
+#[macro_use]
+extern crate quickcheck;
+
 pub use grapheme::{Graphemes, GraphemeIndices};
 pub use tables::UNICODE_VERSION;
 pub use word::{UWordBounds, UWordBoundIndices, UnicodeWords};
diff --git a/src/test.rs b/src/test.rs
@@ -146,3 +146,37 @@ fn test_words() {
                  "Reverse word indices");
     }
 }
+
+quickcheck! {
+    fn quickcheck_forward_reverse_graphemes_extended(s: String) -> bool {
+        let a = s.graphemes(true).collect::<Vec<_>>();
+        let mut b = s.graphemes(true).rev().collect::<Vec<_>>();
+        b.reverse();
+        a == b
+    }
+
+    fn quickcheck_forward_reverse_graphemes_legacy(s: String) -> bool {
+        let a = s.graphemes(false).collect::<Vec<_>>();
+        let mut b = s.graphemes(false).rev().collect::<Vec<_>>();
+        b.reverse();
+        a == b
+    }
+
+    fn quickcheck_join_graphemes(s: String) -> bool {
+        let a = s.graphemes(true).collect::<String>();
+        let b = s.graphemes(false).collect::<String>();
+        a == s && b == s
+    }
+
+    fn quickcheck_forward_reverse_words(s: String) -> bool {
+        let a = s.split_word_bounds().collect::<Vec<_>>();
+        let mut b = s.split_word_bounds().rev().collect::<Vec<_>>();
+        b.reverse();
+        a == b
+    }
+
+    fn quickcheck_join_words(s: String) -> bool {
+        let a = s.split_word_bounds().collect::<String>();
+        a == s
+    }
+}
