fix: Support all literal types in typescript

Author: danez

src/utils/__tests__/getTSType-test.ts

@@ -112,14 +112,16 @@ describe('getTSType', () => {
     });
   });
 
-  it('detects literal types', () => {
-    const literalTypes = ['"foo"', 1234, true];
+  describe('literal types', () => {
+    const literalTypes = ['"foo"', 1234, true, -1, '`foo`'];
 
     literalTypes.forEach(value => {
-      const typePath = typeAlias(`let x: ${value};`);
-      expect(getTSType(typePath)).toEqual({
-        name: 'literal',
-        value: `${value}`,
+      it(`detects ${value}`, () => {
+        const typePath = typeAlias(`let x: ${value};`);
+        expect(getTSType(typePath)).toEqual({
+          name: 'literal',
+          value: `${value}`,
+        });
       });
     });
   });

src/utils/getTSType.ts

@@ -474,8 +474,7 @@ function getTSTypeWithResolvedTypes(
     const literal = path.get('literal');
     type = {
       name: 'literal',
-      // @ts-ignore TODO create test for UnaryExpression (eg. -2 as literal)
-      value: (literal.node.extra?.raw as string) || `${literal.node.value}`,
+      value: printValue(literal),
     };
   } else if (node.type in namedTypes) {
     type = namedTypes[node.type](path, typeParams);