43 lines
1.1 KiB
TypeScript
43 lines
1.1 KiB
TypeScript
import * as data from "./data";
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import {ExpressionEvaluationError} from "./errors";
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import {Evaluator} from "./evaluator";
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import {Lexer} from "./lexer";
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import {Parser} from "./parser";
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describe("evaluator", () => {
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const lexAndParse = (input: string) => {
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const lexer = new Lexer(input);
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const result = lexer.lex();
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// Parse
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const parser = new Parser(result.tokens, ["foo"], []);
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const expr = parser.parse();
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return expr;
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};
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it("basic evaluation", () => {
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const expr = lexAndParse("foo['']");
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// Evaluate expression
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const evaluator = new Evaluator(
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expr,
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new data.Dictionary({
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key: "foo",
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value: new data.Dictionary({key: "bar", value: new data.NumberData(42)})
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})
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);
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const eresult = evaluator.evaluate();
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expect(eresult.kind).toBe(data.Kind.Null);
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});
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it("handle runtime errors", () => {
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const expr = lexAndParse("fromJson('test') == 123");
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const evaluator = new Evaluator(expr, new data.Dictionary());
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expect(() => evaluator.evaluate()).toThrowError(
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new ExpressionEvaluationError("Error parsing JSON when evaluating fromJson")
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);
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});
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});
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