forked from extern/bruno
68 lines
2.4 KiB
JavaScript
68 lines
2.4 KiB
JavaScript
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const { evaluateJsExpression, internalExpressionCache: cache } = require("../src/utils");
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describe("utils", () => {
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describe("expression evaluation", () => {
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const context = {
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res: {
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data: { pets: ["bruno", "max"] }
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}
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};
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afterEach(() => cache.clear());
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it("should evaluate expression", () => {
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let result;
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result = evaluateJsExpression("res.data.pets", context);
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expect(result).toEqual(["bruno", "max"]);
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result = evaluateJsExpression("res.data.pets[0].toUpperCase()", context);
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expect(result).toEqual("BRUNO");
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});
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it("should cache expression", () => {
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expect(cache.size).toBe(0);
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evaluateJsExpression("res.data.pets", context);
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expect(cache.size).toBe(1);
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});
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it("should identify top level variables", () => {
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const expr = "res.data.pets[0].toUpperCase()";
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evaluateJsExpression(expr, context);
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expect(cache.get(expr).toString()).toContain("const { res } = context;");
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});
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it("should not duplicate variables", () => {
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const expr = "res.data.pets[0] + res.data.pets[1]";
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evaluateJsExpression(expr, context);
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expect(cache.get(expr).toString()).toContain("const { res } = context;");
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});
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it("should exclude js keywords like true false from vars", () => {
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const expr = "res.data.pets.length > 0 ? true : false";
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evaluateJsExpression(expr, context);
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expect(cache.get(expr).toString()).toContain("const { res } = context;");
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});
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it("should exclude numbers from vars", () => {
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const expr = "res.data.pets.length + 10";
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evaluateJsExpression(expr, context);
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expect(cache.get(expr).toString()).toContain("const { res } = context;");
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});
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it("should pick variables from complex expressions", () => {
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const expr = "res.data.pets.map(pet => pet.length)";
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const result = evaluateJsExpression(expr, context);
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expect(result).toEqual([5, 3]);
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expect(cache.get(expr).toString()).toContain("const { res, pet } = context;");
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});
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it("should be ok picking extra vars from strings", () => {
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const expr = "'hello' + ' ' + res.data.pets[0]";
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const result = evaluateJsExpression(expr, context);
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expect(result).toBe("hello bruno");
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// extra var hello is harmless
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expect(cache.get(expr).toString()).toContain("const { hello, res } = context;");
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});
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});
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});
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