1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/nom/tests/float.rs b/third_party/rust/nom/tests/float.rs
new file mode 100644
index 0000000000..eb82804f29
--- /dev/null
+++ b/third_party/rust/nom/tests/float.rs
@@ -0,0 +1,46 @@
+#[macro_use]
+extern crate nom;
+
+use nom::character::streaming::digit1 as digit;
+
+use std::str;
+use std::str::FromStr;
+
+named!(
+  unsigned_float<f32>,
+  map_res!(
+    map_res!(
+      recognize!(alt!(
+        delimited!(digit, tag!("."), opt!(digit)) | delimited!(opt!(digit), tag!("."), digit)
+      )),
+      str::from_utf8
+    ),
+    FromStr::from_str
+  )
+);
+
+named!(
+  float<f32>,
+  map!(
+    pair!(opt!(alt!(tag!("+") | tag!("-"))), unsigned_float),
+    |(sign, value): (Option<&[u8]>, f32)| sign
+      .and_then(|s| if s[0] == b'-' { Some(-1f32) } else { None })
+      .unwrap_or(1f32) * value
+  )
+);
+
+#[test]
+fn unsigned_float_test() {
+  assert_eq!(unsigned_float(&b"123.456;"[..]), Ok((&b";"[..], 123.456)));
+  assert_eq!(unsigned_float(&b"0.123;"[..]), Ok((&b";"[..], 0.123)));
+  assert_eq!(unsigned_float(&b"123.0;"[..]), Ok((&b";"[..], 123.0)));
+  assert_eq!(unsigned_float(&b"123.;"[..]), Ok((&b";"[..], 123.0)));
+  assert_eq!(unsigned_float(&b".123;"[..]), Ok((&b";"[..], 0.123)));
+}
+
+#[test]
+fn float_test() {
+  assert_eq!(float(&b"123.456;"[..]), Ok((&b";"[..], 123.456)));
+  assert_eq!(float(&b"+123.456;"[..]), Ok((&b";"[..], 123.456)));
+  assert_eq!(float(&b"-123.456;"[..]), Ok((&b";"[..], -123.456)));
+}