fix: Correctly handle negative numbers, fix #65

.yarn/versions/66b0f787.yml

@@ -0,0 +1,5 @@
+releases:
+  "@typoas/generator": patch
+
+declined:
+  - "@typoas/cli"

packages/typoas-generator/src/generator/utils/__tests__/__snapshots__/types.spec.ts.snap

@@ -30,6 +30,8 @@ exports[`create type from schema should handle primitive boolean enums 1`] = `"t
 
 exports[`create type from schema should handle primitive boolean schema 1`] = `"boolean"`;
 
+exports[`create type from schema should handle primitive negative number enums 1`] = `"-1 | 6"`;
+
 exports[`create type from schema should handle primitive number enums 1`] = `"1 | 6"`;
 
 exports[`create type from schema should handle primitive number schema 1`] = `"number"`;

packages/typoas-generator/src/generator/utils/__tests__/types.spec.ts

@@ -78,6 +78,14 @@ describe('create type from schema', () => {
     expect(getStringFromNode(node)).toMatchSnapshot();
   });
 
+  it('should handle primitive negative number enums', () => {
+    const schema: SchemaObject = { type: 'number', enum: [-1, 6] };
+
+    const node = createTypeFromSchema(schema, new Context());
+
+    expect(getStringFromNode(node)).toMatchSnapshot();
+  });
+
   it('should handle dates', () => {
     const schema: SchemaObject = { type: 'string', format: 'date-time' };
 

packages/typoas-generator/src/generator/utils/types.ts

@@ -60,7 +60,14 @@ export function createTypeFromSchema(
             return e ? factory.createTrue() : factory.createFalse();
           }
           if (typeof e === 'number') {
-            return factory.createNumericLiteral(e);
+            const literal = factory.createNumericLiteral(Math.abs(e));
+            if (e >= 0) {
+              return literal;
+            }
+            return factory.createPrefixUnaryExpression(
+              SyntaxKind.MinusToken,
+              literal,
+            );
           }
           return factory.createStringLiteral(e as string, true);
         })