add test for invalid repr of nullability

odbc-api/src/environment.rs

@@ -644,7 +644,7 @@ fn attributes_iter(attributes: &str) -> impl Iterator<Item = (String, String)> +
 }
 
 #[cfg(test)]
-mod test {
+mod tests {
 
     use super::*;
 

odbc-api/src/fixed_sized.rs

@@ -110,7 +110,7 @@ impl_input_fixed_sized!(i64, DataType::BigInt);
 // supported, implementation DataType would need to take an instance into account.
 
 #[cfg(test)]
-mod test {
+mod tests {
 
     use super::Bit;
 

odbc-api/src/handles/column_description.rs

@@ -27,7 +27,7 @@ impl Nullability {
             odbc_sys::Nullability::UNKNOWN => Nullability::Unknown,
             odbc_sys::Nullability::NO_NULLS => Nullability::NoNulls,
             odbc_sys::Nullability::NULLABLE => Nullability::Nullable,
-            other => panic!("ODBC returned invalid value for Nullable: {:?}", other),
+            other => panic!("ODBC returned invalid value for Nullable: {}", other.0),
         }
     }
 }
@@ -59,3 +59,16 @@ impl ColumnDescription {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::Nullability;
+
+
+    /// Application should panic if ODBC driver returns unsupported value for nullable
+    #[test]
+    #[should_panic(expected = "ODBC returned invalid value for Nullable: 5")]
+    fn invalid_nullable_representation(){
+        Nullability::new(odbc_sys::Nullability(5));
+    }
+}

odbc-api/src/handles/diagnostics.rs

@@ -205,7 +205,7 @@ impl fmt::Debug for Record {
 }
 
 #[cfg(test)]
-mod test {
+mod tests {
 
     use crate::handles::diagnostics::State;