Removed testing stubs as these stubs will not catch anything in the n…

…on-debug mode.

tests/model/documentselection.js

@@ -600,14 +600,13 @@ describe( 'DocumentSelection', () => {
 		} );
 
 		it( 'should do nothing when trying to set selection to the graveyard', () => {
-			const consoleWarnStub = sinon.stub( console, 'warn' );
+			// Catches the 'Trying to add a Range that is in the graveyard root. Range rejected.' warning in the CK_DEBUG mode.
+			sinon.stub( console, 'warn' );
 
 			const range = new Range( new Position( model.document.graveyard, [ 0 ] ) );
 			selection._setTo( range );
 
 			expect( selection._ranges ).to.deep.equal( [] );
-			sinon.assert.calledOnce( consoleWarnStub );
-			sinon.assert.calledWith( consoleWarnStub, 'Trying to add a Range that is in the graveyard root. Range rejected.' );
 		} );
 
 		it( 'should detach removed ranges', () => {

tests/model/operation/transform.js

@@ -63,7 +63,8 @@ describe( 'transform', () => {
 	};
 
 	it( 'should throw an error when one of operations is invalid', () => {
-		const consoleWarnStub = sinon.stub( console, 'warn' );
+		// Catches the 'Error during operation transformation!' warning in the CK_DEBUG mode.
+		sinon.stub( console, 'warn' );
 
 		const nodeA = new Node();
 		const nodeB = new Node();
@@ -85,8 +86,6 @@ describe( 'transform', () => {
 				baRelation: null
 			} );
 		} ).to.throw( TypeError );
-
-		sinon.assert.calledWith( consoleWarnStub, 'Error during operation transformation!' );
 	} );
 
 	describe( 'InsertOperation', () => {

tests/view/observer/selectionobserver.js

@@ -168,20 +168,16 @@ describe( 'SelectionObserver', () => {
 		} );
 
 		const selectionChangeSpy = sinon.spy();
-		const consoleWarnStub = sinon.stub( console, 'warn' );
+
+		// Catches the "Selection change observer detected an infinite rendering loop." warning in the CK_DEBUG mode.
+		sinon.stub( console, 'warn' );
 
 		viewDocument.on( 'selectionChange', selectionChangeSpy );
 
 		return new Promise( resolve => {
 			viewDocument.on( 'selectionChangeDone', () => {
 				expect( selectionChangeSpy.callCount ).to.equal( 60 );
 
-				sinon.assert.called( consoleWarnStub );
-				sinon.assert.calledWith(
-					consoleWarnStub,
-					'Selection change observer detected an infinite rendering loop.'
-				);
-
 				resolve();
 			} );
 

tests/view/view/view.js

@@ -473,16 +473,14 @@ describe( 'view', () => {
 		} );
 
 		it( 'should not crash when there is no selection', () => {
-			const consoleWarnStub = sinon.stub( console, 'warn' );
+			// Catches the `There is no selection in any editable to focus.` warning in the CK_DEBUG mode.
+			sinon.stub( console, 'warn' );
 
 			view.change( writer => {
 				writer.setSelection( null );
 			} );
 
 			view.focus();
-
-			sinon.assert.calledOnce( consoleWarnStub );
-			sinon.assert.calledWith( consoleWarnStub, 'There is no selection in any editable to focus.' );
 		} );
 	} );