1 files changed, 18 insertions, 2 deletions
diff --git a/tests/tier2_i2c.rs b/tests/tier2_i2c.rs
index 1eb2871..5a3c950 100644
--- a/tests/tier2_i2c.rs
+++ b/tests/tier2_i2c.rs
@@ -2,7 +2,7 @@ extern crate embedded_hal;
 extern crate embedded_hal_mock as hal;
 use hal::i2c::Transaction as I2cTrans;
 extern crate ads1x1x;
-use ads1x1x::ComparatorMode;
+use ads1x1x::{ ComparatorMode, ComparatorPolarity };
 
 #[macro_use]
 mod common;
@@ -21,12 +21,28 @@ macro_rules! test_set_comparator_mode {
     }
 }
 
-
 mod can_set_comparator_mode {
     use super::*;
     test_set_comparator_mode!(traditional, Traditional, Config::default().with_low( BitFlags::COMP_MODE));
     test_set_comparator_mode!(window,      Window,      Config::default().with_high(BitFlags::COMP_MODE));
 }
 
+macro_rules! test_set_comparator_pol {
+    ($name:ident, $variant:ident, $config:expr) => {
+        #[test]
+        fn $name() {
+            let transactions = [ I2cTrans::write(DEV_ADDR, vec![Register::CONFIG, $config.msb(), $config.lsb()]) ];
+            let mut dev = new_ads1014(&transactions);
+            dev.set_comparator_polarity(ComparatorPolarity::$variant).unwrap();
+            destroy_ads1014(dev);
+        }
+    }
+}
+
+mod can_set_comparator_polarity {
+    use super::*;
+    test_set_comparator_pol!(low,  ActiveLow,  Config::default().with_low( BitFlags::COMP_POL));
+    test_set_comparator_pol!(high, ActiveHigh, Config::default().with_high(BitFlags::COMP_POL));
+}