Fix clientDefaults logic, some more tests for core pkg

moor/lib/src/runtime/query_builder/statements/insert.dart

@@ -96,19 +96,19 @@ class InsertStatement<D extends DataClass> {
 
     final rawValues = table.entityToSql(entry.createCompanion(true));
 
-    // strip out null values, apply client defaults where applicable
+    // apply default values for columns that have one
     final map = <String, Variable>{};
-    for (final columnName in rawValues.keys) {
-      final value = rawValues[columnName];
+    for (final column in table.$columns) {
+      final columnName = column.$name;
 
-      if (value != null) {
-        map[columnName] = value;
+      if (rawValues.containsKey(columnName)) {
+        map[columnName] = rawValues[columnName];
       } else {
-        final column = table.columnsByName[columnName];
-        if (column.defaultValue != null) {
+        if (column.clientDefault != null) {
           map[columnName] = column._evaluateClientDefault();
         }
       }
+
       // column not set, and doesn't have a client default. So just don't
       // include this column
     }

moor/test/insert_test.dart

@@ -34,8 +34,8 @@ void main() {
 
     verify(executor.runInsert(
         'INSERT INTO table_without_p_k '
-        '(not_really_an_id, some_float) VALUES (?, ?)',
-        [42, 3.1415]));
+        '(not_really_an_id, some_float, custom) VALUES (?, ?, ?)',
+        [42, 3.1415, anything]));
   });
 
   test('generates insert or replace statements', () async {
@@ -147,7 +147,17 @@ void main() {
     expect(exception.toString(), startsWith('InvalidDataException'));
   });
 
-  test('reports auto-increment id', () async {
+  test("doesn't allow writing null rows", () {
+    expect(
+      () {
+        return db.into(db.todosTable).insert(null);
+      },
+      throwsA(const TypeMatcher<InvalidDataException>().having(
+          (e) => e.message, 'message', contains('Cannot write null row'))),
+    );
+  });
+
+  test('reports auto-increment id', () {
     when(executor.runInsert(any, any)).thenAnswer((_) => Future.value(42));
 
     expect(
@@ -158,6 +168,21 @@ void main() {
     );
   });
 
+  test('evaluates client-default functions', () async {
+    await db.into(db.tableWithoutPK).insert(
+        TableWithoutPKCompanion.insert(notReallyAnId: 3, someFloat: 3.14));
+
+    // the client default generates a uuid
+    final uuidRegex = RegExp(
+        r'[0-9a-f]{8}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{12}');
+
+    verify(executor.runInsert(
+      'INSERT INTO table_without_p_k (not_really_an_id, some_float, custom) '
+      'VALUES (?, ?, ?)',
+      [3, 3.14, matches(uuidRegex)],
+    ));
+  });
+
   test('escaped when column name is keyword', () async {
     await db
         .into(db.pureDefaults)

moor/test/join_test.dart

@@ -116,6 +116,37 @@ void main() {
         argThat(contains('WHERE t.id < ? ORDER BY t.title ASC')), [3]));
   });
 
+  test('can be watched', () {
+    final todos = db.alias(db.todosTable, 't');
+    final categories = db.alias(db.categories, 'c');
+
+    final query = db
+        .select(todos)
+        .join([innerJoin(categories, todos.category.equalsExp(categories.id))]);
+
+    final stream = query.watch();
+    expectLater(stream, emitsInOrder([[], []]));
+
+    db.markTablesUpdated({todos});
+    db.markTablesUpdated({categories});
+  });
+
+  test('setting where multiple times forms conjunction', () async {
+    final todos = db.alias(db.todosTable, 't');
+    final categories = db.alias(db.categories, 'c');
+
+    final query = db
+        .select(todos)
+        .join([innerJoin(categories, todos.category.equalsExp(categories.id))])
+          ..where(todos.id.isSmallerThanValue(5))
+          ..where(categories.id.isBiggerOrEqualValue(10));
+
+    await query.get();
+
+    verify(executor
+        .runSelect(argThat(contains('WHERE t.id < ? AND c.id >= ?')), [5, 10]));
+  });
+
   test('supports custom columns and results', () async {
     final categories = db.alias(db.categories, 'c');
     final descriptionLength = categories.description.length;