support null -> None conversions (#17)

TheLartians · web-flow · commit cd829536c8f1 · 2024-10-02T12:57:46.000Z
diff --git a/src/ParserState.ts b/src/ParserState.ts
@@ -14,6 +14,7 @@ export type ParserState = {
 export const createNewParserState = (typechecker: ts.TypeChecker, config: Ts2PyConfig): ParserState => {
   const knownTypes = new Map<ts.Type, string>();
   knownTypes.set(typechecker.getVoidType(), "None");
+  knownTypes.set(typechecker.getNullType(), "None");
   knownTypes.set(typechecker.getUndefinedType(), "None");
   knownTypes.set(typechecker.getStringType(), "str");
   knownTypes.set(typechecker.getBooleanType(), "bool");
diff --git a/src/testing/basic.test.ts b/src/testing/basic.test.ts
@@ -7,6 +7,7 @@ describe("transpiling basic types", () => {
     ["export type T = string;", "T = str"],
     ["export type T = undefined;", "T = None"],
     ["export type T = void;", "T = None"],
+    ["export type T = null;", "T = None"],
     [
       "export type T = true;",
       "from typing_extensions import Literal\n\nT = Literal[True]",

Original file line number	Diff line number	Diff line change
`@@ -7,6 +7,7 @@ describe("transpiling basic types", () => {`
`7`	`7`	`["export type T = string;", "T = str"],`
`8`	`8`	`["export type T = undefined;", "T = None"],`
`9`	`9`	`["export type T = void;", "T = None"],`
	`10`	`+ ["export type T = null;", "T = None"],`
`10`	`11`	`[`
`11`	`12`	`"export type T = true;",`
`12`	`13`	`"from typing_extensions import Literal\n\nT = Literal[True]",`