Corrected Record::new().

src/data/record.rs

@@ -25,8 +25,18 @@ pub struct Record {
 }
 
 impl Record {
-    pub fn new(data: HashMap<String, Field>) -> Self {
-        Self { data: data }
+    pub fn new() -> Self {
+        Self {
+            data: HashMap::new(),
+        }
+    }
+
+    pub fn add<S, D>(&mut self, name: S, data: D) -> Option<Field>
+    where
+        String: From<S>,
+        Field: From<D>,
+    {
+        self.data.insert(name.into(), data.into())
     }
 }
 
@@ -56,21 +66,49 @@ mod records {
 
     #[test]
     fn new_record() {
-        let data: HashMap<String, Field> = HashMap::new();
-        let rec = Record::new(data);
+        let rec = Record::new();
         assert_eq!(rec.len(), 0);
     }
 
+    #[test]
+    fn add_field() {
+        let mut rec = Record::new();
+        let name = "field_name";
+        let data = ID::random();
+        rec.add(name.to_string(), data);
+        match rec.get(name) {
+            Some(data) => match data {
+                Field::ID(result) => assert_eq!(result.to_string(), data.to_string()),
+            },
+            None => unreachable!("Should get data back"),
+        }
+    }
+
+    #[test]
+    fn add_alternate_field() {
+        let mut rec = Record::new();
+        let name = "alternate";
+        let data = ID::random();
+        rec.add(name, data.clone());
+        match rec.get(name) {
+            Some(data) => match data {
+                Field::ID(result) => assert_eq!(result.to_string(), data.to_string()),
+            },
+            None => unreachable!("Should get data back"),
+        }
+    }
+
     #[test]
     fn record_iter() {
-        let a = Field::from(ID::random());
-        let b = Field::from(ID::random());
-        let c = Field::from(ID::random());
-        let mut data: HashMap<String, Field> = HashMap::new();
-        data.insert("a".to_string(), a.clone());
-        data.insert("b".to_string(), b.clone());
-        data.insert("c".to_string(), c.clone());
-        let rec = Record::new(data.clone());
+        let mut data: HashMap<String, ID> = HashMap::new();
+        data.insert("a".to_string(), ID::random());
+        data.insert("b".to_string(), ID::random());
+        data.insert("c".to_string(), ID::random());
+        let mut rec = Record::new();
+        for (key, value) in data.iter() {
+            rec.add(key, value.clone());
+        }
+        assert_eq!(rec.len(), data.len());
         for (key, value) in rec.iter() {
             assert_eq!(value.to_string(), data.get(key).unwrap().to_string());
         }

src/data/table.rs

@@ -11,6 +11,7 @@ use std::{collections::HashMap, fmt};
 pub enum TBLError {
     DuplicateField(String),
     InvalidField(String),
+    MissingField(String),
 }
 
 impl fmt::Display for TBLError {
@@ -18,6 +19,7 @@ impl fmt::Display for TBLError {
         match self {
             TBLError::DuplicateField(data) => write!(f, "'{}' already exists", data),
             TBLError::InvalidField(data) => write!(f, "'{}' invalid field name", data),
+            TBLError::MissingField(data) => write!(f, "'{}' field is missing", data),
         }
     }
 }
@@ -39,6 +41,13 @@ mod errors {
         let err = TBLError::InvalidField(data.to_string());
         assert_eq!(err.to_string(), format!("'{}' invalid field name", data));
     }
+
+    #[test]
+    fn missing_field() {
+        let data = "something";
+        let err = TBLError::MissingField(data.to_string());
+        assert_eq!(err.to_string(), format!("'{}' field is missing", data));
+    }
 }
 
 enum FieldType {
@@ -86,15 +95,22 @@ impl Table {
     }
 
     fn add_record(&mut self, rec: Record) -> Result<Record, MTTError> {
-        for (key, _) in rec.iter() {
-            match self.fields.get(key) {
+        let mut holder = rec.clone();
+        for (key, _) in self.fields.iter() {
+            match holder.remove(key.into()) {
                 Some(_) => {}
                 None => {
-                    let err = TBLError::InvalidField(key.to_string());
+                    let err = TBLError::MissingField(key.to_string());
                     return Err(err.into());
                 }
             }
         }
+        if holder.len() > 0 {
+            for (key, _) in holder.iter() {
+                let err = TBLError::InvalidField(key.to_string());
+                return Err(err.into());
+            }
+        }
         Ok(rec)
     }
 }
@@ -134,10 +150,10 @@ mod table {
         match tbl.add_field(name, FieldType::ID) {
             Ok(_) => unreachable!(" Should not duplicates."),
             Err(err) => match err.get_code() {
-                ErrorType::TBLErr(data) => {match data {
+                ErrorType::TBLErr(data) => match data {
                     TBLError::DuplicateField(fname) => assert_eq!(fname, name),
                     _ => unreachable!("Should have been a dupluicate field error"),
-                }}
+                },
                 _ => unreachable!("should produce a duplicate name error"),
             },
         }
@@ -149,9 +165,8 @@ mod table {
         let name = "id";
         let field_data = ID::random();
         tbl.add_field(name, FieldType::ID).unwrap();
-        let mut data: HashMap<String, Field> = HashMap::new();
-        data.insert(name.to_string(), field_data.clone().into());
-        let rec = Record::new(data);
+        let mut rec = Record::new();
+        rec.add(name, field_data.clone());
         let result = tbl.add_record(rec).unwrap();
         assert_eq!(
             result.get(name).unwrap().to_string(),
@@ -164,9 +179,8 @@ mod table {
         let mut tbl = Table::new();
         let name = "id";
         let field_data = ID::random();
-        let mut data: HashMap<String, Field> = HashMap::new();
-        data.insert(name.to_string(), field_data.clone().into());
-        let rec = Record::new(data);
+        let mut rec = Record::new();
+        rec.add(name, field_data.clone());
         match tbl.add_record(rec) {
             Ok(_) => unreachable!("should have produced an error"),
             Err(err) => match err.get_code() {
@@ -175,7 +189,28 @@ mod table {
                     _ => unreachable!("should have been invalid field name"),
                 },
                 _ => unreachable!("should have been a table error"),
+            },
         }
     }
+
+    #[test]
+    fn add_record_missing_field() {
+        let mut tbl = Table::new();
+        let present = "here";
+        let missing = "not";
+        tbl.add_field(present, FieldType::ID);
+        tbl.add_field(missing, FieldType::ID);
+        let mut rec = Record::new();
+        rec.add(present, ID::random());
+        match tbl.add_record(rec) {
+            Ok(_) => unreachable!("should have produced an error"),
+            Err(err) => match err.get_code() {
+                ErrorType::TBLErr(error) => match error {
+                    TBLError::MissingField(result) => assert_eq!(result, missing),
+                    _ => unreachable!("should have been missing field"),
+                },
+                _ => unreachable!("should have been a table error"),
+            },
+        }
     }
 }

src/error.rs

@@ -1,4 +1,4 @@
-use crate::data::{id::IDError, DBError, table::TBLError};
+use crate::data::{id::IDError, table::TBLError, DBError};
 use std::{error::Error, fmt};
 
 #[derive(Debug)]
@@ -109,7 +109,6 @@ impl From<TBLError> for MTTError {
     }
 }
 
-
 #[cfg(test)]
 mod errors {
     use super::*;