Implement quick TSConditionalType stub solution (#76)

* Implement quick TSConditionalType stub solution

* Changeset

Author: soswow

.changeset/7e14e139/changes.json

@@ -0,0 +1,21 @@
+{
+  "releases": [{ "name": "extract-react-types", "type": "minor" }],
+  "dependents": [
+    {
+      "name": "babel-plugin-extract-react-types",
+      "type": "patch",
+      "dependencies": ["extract-react-types"]
+    },
+    {
+      "name": "pretty-proptypes",
+      "type": "patch",
+      "dependencies": ["kind2string", "extract-react-types"]
+    },
+    {
+      "name": "extract-react-types-loader",
+      "type": "patch",
+      "dependencies": ["extract-react-types"]
+    },
+    { "name": "kind2string", "type": "patch", "dependencies": ["extract-react-types"] }
+  ]
+}

.changeset/7e14e139/changes.md

@@ -0,0 +1 @@
+Implement stub for TSConditionalType

packages/extract-react-types/__snapshots__/test.js.snap

@@ -3955,6 +3955,39 @@ Object {
 }
 `;
 
+exports[`ts custom prop 2`] = `
+Object {
+  "component": Object {
+    "key": Object {
+      "kind": "any",
+    },
+    "kind": "generic",
+    "name": Object {
+      "kind": "id",
+      "name": "Component",
+      "type": null,
+    },
+    "typeParams": Object {
+      "kind": "typeParams",
+      "params": Array [
+        Object {
+          "kind": "string",
+        },
+        Object {
+          "kind": "object",
+          "members": Array [],
+        },
+      ],
+    },
+    "value": Object {
+      "kind": "any",
+      "referenceIdName": "Foo",
+    },
+  },
+  "kind": "program",
+}
+`;
+
 exports[`ts decorators 1`] = `
 Object {
   "component": Object {

packages/extract-react-types/src/index.js

@@ -1396,6 +1396,12 @@ converters.ImportSpecifier = (path, context): K.Import => {
   return importConverterGeneral(path, context);
 };
 
+converters.TSConditionalType = (): K.Any => {
+  return {
+    kind: 'any'
+  };
+};
+
 function convertMethodCall(path, context): K.Func {
   const parameters = path.get('parameters').map(p => convertParameter(p, context));
   const returnType = convert(path.get('typeAnnotation'), context);

packages/extract-react-types/test.js

@@ -1609,7 +1609,17 @@ const TESTS = [
       }
     }
     `
-  }
+  },
+  {
+    name: 'ts custom prop',
+    typeSystem: 'typescript',
+    code: `
+    type Foo<T, U> = T extends object ? T : U;
+
+    class Component extends React.Component<Foo<string, {}>> {
+    }
+  `
+  },
 ];
 
 cases(