Address clippy::float_cmp issues

src/buffer.rs

@@ -706,6 +706,7 @@ mod test {
         assert_eq!(buffer.to_vec::<u8>(py).unwrap(), b"abcde");
     }
 
+    #[allow(clippy::float_cmp)] // The test wants to ensure that no precision was lost on the Python round-trip
     #[test]
     fn test_array_buffer() {
         let gil = Python::acquire_gil();

src/types/complex.rs

@@ -196,6 +196,7 @@ mod complex_conversion {
     complex_conversion!(f32);
     complex_conversion!(f64);
 
+    #[allow(clippy::float_cmp)] // The test wants to ensure that no precision was lost on the Python round-trip
     #[test]
     fn from_complex() {
         let gil = Python::acquire_gil();
@@ -230,11 +231,13 @@ mod test {
 
     #[test]
     fn test_from_double() {
+        use assert_approx_eq::assert_approx_eq;
+
         let gil = Python::acquire_gil();
         let py = gil.python();
         let complex = PyComplex::from_doubles(py, 3.0, 1.2);
-        assert_eq!(complex.real(), 3.0);
-        assert_eq!(complex.imag(), 1.2);
+        assert_approx_eq!(complex.real(), 3.0);
+        assert_approx_eq!(complex.imag(), 1.2);
     }
 
     #[cfg(not(Py_LIMITED_API))]

src/types/floatob.rs

@@ -91,11 +91,13 @@ mod test {
         ($func_name:ident, $t1:ty, $t2:ty) => (
             #[test]
             fn $func_name() {
+                use assert_approx_eq::assert_approx_eq;
+
                 let gil = Python::acquire_gil();
                 let py = gil.python();
                 let val = 123 as $t1;
                 let obj = val.to_object(py);
-                assert_eq!(obj.extract::<$t2>(py).unwrap(), val as $t2);
+                assert_approx_eq!(obj.extract::<$t2>(py).unwrap(), val as $t2);
             }
         )
     );
@@ -106,10 +108,12 @@ mod test {
 
     #[test]
     fn test_as_double_macro() {
+        use assert_approx_eq::assert_approx_eq;
+
         let gil = Python::acquire_gil();
         let py = gil.python();
         let v = 1.23f64;
         let obj = v.to_object(py);
-        assert_eq!(v, unsafe { PyFloat_AS_DOUBLE(obj.as_ptr()) });
+        assert_approx_eq!(v, unsafe { PyFloat_AS_DOUBLE(obj.as_ptr()) });
     }
 }

tests/test_datetime.rs

@@ -102,6 +102,7 @@ fn test_delta_check() {
 
 #[test]
 fn test_datetime_utc() {
+    use assert_approx_eq::assert_approx_eq;
     use pyo3::types::PyDateTime;
 
     let gil = Python::acquire_gil();
@@ -120,7 +121,7 @@ fn test_datetime_utc() {
         .unwrap()
         .extract()
         .unwrap();
-    assert_eq!(offset, 0f32);
+    assert_approx_eq!(offset, 0f32);
 }
 
 #[cfg(Py_3_6)]