0.5: Support floats nan, inf, and +/-0.0.

cc #224

1 files changed, 79 insertions, 0 deletions

diff --git a/test-suite/tests/float.rs b/test-suite/tests/float.rs
new file mode 100644
index 0000000..6590fe4
--- /dev/null
+++ b/test-suite/tests/float.rs
@@ -0,0 +1,79 @@
+extern crate toml;
+#[macro_use]
+extern crate serde_derive;
+
+use toml::Value;
+
+macro_rules! float_inf_tests {
+    ($ty:ty) => {{
+        #[derive(Serialize, Deserialize)]
+        struct S {
+            sf1: $ty,
+            sf2: $ty,
+            sf3: $ty,
+            sf4: $ty,
+            sf5: $ty,
+            sf6: $ty,
+            sf7: $ty,
+            sf8: $ty,
+        }
+        let inf: S = toml::from_str(
+            r"
+        # infinity
+        sf1 = inf  # positive infinity
+        sf2 = +inf # positive infinity
+        sf3 = -inf # negative infinity
+
+        # not a number
+        sf4 = nan  # actual sNaN/qNaN encoding is implementation specific
+        sf5 = +nan # same as `nan`
+        sf6 = -nan # valid, actual encoding is implementation specific
+
+        # zero
+        sf7 = +0.0
+        sf8 = -0.0
+        ").expect("Parse infinities.");
+
+        assert!(inf.sf1.is_infinite());
+        assert!(inf.sf1.is_sign_positive());
+        assert!(inf.sf2.is_infinite());
+        assert!(inf.sf2.is_sign_positive());
+        assert!(inf.sf3.is_infinite());
+        assert!(inf.sf3.is_sign_negative());
+
+        assert!(inf.sf4.is_nan());
+        assert!(inf.sf4.is_sign_positive());
+        assert!(inf.sf5.is_nan());
+        assert!(inf.sf5.is_sign_positive());
+        assert!(inf.sf6.is_nan());
+        assert!(inf.sf6.is_sign_negative());
+
+        assert_eq!(inf.sf7, 0.0);
+        assert!(inf.sf7.is_sign_positive());
+        assert_eq!(inf.sf8, 0.0);
+        assert!(inf.sf8.is_sign_negative());
+
+        let s = toml::to_string(&inf).unwrap();
+        assert_eq!(
+            s, "\
+sf1 = inf
+sf2 = inf
+sf3 = -inf
+sf4 = nan
+sf5 = nan
+sf6 = -nan
+sf7 = 0.0
+sf8 = -0.0
+"
+        );
+
+        toml::from_str::<Value>(&s).expect("roundtrip");
+    }};
+}
+
+#[test]
+#[cfg(feature = "test-nan-sign")]
+fn float_inf() {
+    float_inf_tests!(f32);
+    float_inf_tests!(f64);
+}