Ignore more diagnostics with expectError (#17)

Author: BendingBender

source/lib/compiler.ts

@@ -69,6 +69,12 @@ const extractExpectErrorRanges = (sourceFile: SourceFile) => {
 	return expectedErrors;
 };
 
+const diagnosticCodesToIgnore = [
+	DiagnosticCode.ArgumentTypeIsNotAssignableToParameterType,
+	DiagnosticCode.PropertyDoesNotExistOnType,
+	DiagnosticCode.CannotAssignToReadOnlyProperty
+];
+
 /**
  * Check if the provided diagnostic should be ignored.
  *
@@ -82,7 +88,7 @@ const ignoreDiagnostic = (diagnostic: TSDiagnostic, expectedErrors: Map<Position
 		return true;
 	}
 
-	if (diagnostic.code !== DiagnosticCode.ArgumentTypeIsNotAssignableToParameterType) {
+	if (!diagnosticCodesToIgnore.includes(diagnostic.code)) {
 		return false;
 	}
 

source/lib/interfaces.ts

@@ -7,7 +7,9 @@ export interface Context {
 
 export enum DiagnosticCode {
 	AwaitIsOnlyAllowedInAsyncFunction = 1308,
-	ArgumentTypeIsNotAssignableToParameterType = 2345
+	PropertyDoesNotExistOnType = 2339,
+	ArgumentTypeIsNotAssignableToParameterType = 2345,
+	CannotAssignToReadOnlyProperty = 2540
 }
 
 export interface Diagnostic {

source/test/fixtures/expect-error/values/index.test-d.ts

@@ -2,3 +2,10 @@ import {expectError} from '../../../..';
 
 expectError<string>(1);
 expectError<string>('fo');
+
+const foo: {readonly bar: string} = {
+	bar: 'baz'
+};
+
+expectError(foo.bar = 'quux');
+expectError(foo.quux);