parser-utils.test.ts

import { ok, strictEqual } from "assert";
import { describe, it } from "vitest";
import { SyntaxKind, TypeSpecScriptNode } from "../src/core/index.js";
import { getNodeAtPosition, parse } from "../src/core/parser.js";
import { Node } from "../src/core/types.js";
import { extractCursor } from "../src/testing/test-server-host.js";
import { dumpAST } from "./ast-test-utils.js";

describe("compiler: parser utils", () => {
  describe("getNodeAtPosition", () => {
    async function getNodeAtCursor(
      sourceWithCursor: string
    ): Promise<{ root: TypeSpecScriptNode; node: Node | undefined }> {
      const { source, pos } = extractCursor(sourceWithCursor);
      const root = parse(source);
      dumpAST(root);
      return { node: getNodeAtPosition(root, pos), root };
    }

    it("return namespace when in namespace body", async () => {
      const { node } = await getNodeAtCursor(`
        namespace Foo {
          ┆
        }
      `);
      ok(node);
      strictEqual(node.kind, SyntaxKind.NamespaceStatement as const);
      strictEqual(node.id.sv, "Foo");
    });

    it("return identifier for property return type", async () => {
      const { node } = await getNodeAtCursor(`
        model Foo {
          prop: stri┆ng
        }
      `);
      ok(node);
      strictEqual(node.kind, SyntaxKind.Identifier as const);
      strictEqual(node.sv, "string");
    });

    it("return string literal when in non completed string", async () => {
      const { node } = await getNodeAtCursor(`
        import "┆
      `);
      ok(node);
      strictEqual(node.kind, SyntaxKind.StringLiteral);
    });

    it("return string literal when in non completed multi line string", async () => {
      const { node } = await getNodeAtCursor(`
        model Foo {
          prop: """┆
        }
      `);
      ok(node);
      strictEqual(node.kind, SyntaxKind.StringLiteral);
    });

    it("return missing identifier between dot and close paren", async () => {
      const { node } = await getNodeAtCursor(`
        @myDecN.┆)
      `);
      ok(node);
      strictEqual(node.kind, SyntaxKind.Identifier as const);
      strictEqual(node.sv, "<missing identifier>1");
    });
  });
});