grafana/public/app/plugins/datasource/graphite/specs/lexer.jest.ts

import { Lexer } from "../lexer";

describe("when lexing graphite expression", function() {
  it("should tokenize metric expression", function() {
    var lexer = new Lexer("metric.test.*.asd.count");
    var tokens = lexer.tokenize();
    expect(tokens[0].value).toBe("metric");
    expect(tokens[1].value).toBe(".");
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[4].type).toBe("identifier");
    expect(tokens[4].pos).toBe(13);
  });

  it("should tokenize metric expression with dash", function() {
    var lexer = new Lexer("metric.test.se1-server-*.asd.count");
    var tokens = lexer.tokenize();
    expect(tokens[4].type).toBe("identifier");
    expect(tokens[4].value).toBe("se1-server-*");
  });

  it("should tokenize metric expression with dash2", function() {
    var lexer = new Lexer("net.192-168-1-1.192-168-1-9.ping_value.*");
    var tokens = lexer.tokenize();
    expect(tokens[0].value).toBe("net");
    expect(tokens[2].value).toBe("192-168-1-1");
  });

  it("should tokenize metric expression with equal sign", function() {
    var lexer = new Lexer("apps=test");
    var tokens = lexer.tokenize();
    expect(tokens[0].value).toBe("apps=test");
  });

  it("simple function2", function() {
    var lexer = new Lexer("offset(test.metric, -100)");
    var tokens = lexer.tokenize();
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[4].type).toBe("identifier");
    expect(tokens[6].type).toBe("number");
  });

  it("should tokenize metric expression with curly braces", function() {
    var lexer = new Lexer("metric.se1-{first, second}.count");
    var tokens = lexer.tokenize();
    expect(tokens.length).toBe(10);
    expect(tokens[3].type).toBe("{");
    expect(tokens[4].value).toBe("first");
    expect(tokens[5].value).toBe(",");
    expect(tokens[6].value).toBe("second");
  });

  it("should tokenize metric expression with number segments", function() {
    var lexer = new Lexer("metric.10.12_10.test");
    var tokens = lexer.tokenize();
    expect(tokens[0].type).toBe("identifier");
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[2].value).toBe("10");
    expect(tokens[4].value).toBe("12_10");
    expect(tokens[4].type).toBe("identifier");
  });

  it("should tokenize metric expression with segment that start with number", function() {
    var lexer = new Lexer("metric.001-server");
    var tokens = lexer.tokenize();
    expect(tokens[0].type).toBe("identifier");
    expect(tokens[2].type).toBe("identifier");
    expect(tokens.length).toBe(3);
  });

  it("should tokenize func call with numbered metric and number arg", function() {
    var lexer = new Lexer("scale(metric.10, 15)");
    var tokens = lexer.tokenize();
    expect(tokens[0].type).toBe("identifier");
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[2].value).toBe("metric");
    expect(tokens[4].value).toBe("10");
    expect(tokens[4].type).toBe("number");
    expect(tokens[6].type).toBe("number");
  });

  it("should tokenize metric with template parameter", function() {
    var lexer = new Lexer("metric.[[server]].test");
    var tokens = lexer.tokenize();
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[2].value).toBe("[[server]]");
    expect(tokens[4].type).toBe("identifier");
  });

  it("should tokenize metric with question mark", function() {
    var lexer = new Lexer("metric.server_??.test");
    var tokens = lexer.tokenize();
    expect(tokens[2].type).toBe("identifier");
    expect(tokens[2].value).toBe("server_??");
    expect(tokens[4].type).toBe("identifier");
  });

  it("should handle error with unterminated string", function() {
    var lexer = new Lexer("alias(metric, 'asd)");
    var tokens = lexer.tokenize();
    expect(tokens[0].value).toBe("alias");
    expect(tokens[1].value).toBe("(");
    expect(tokens[2].value).toBe("metric");
    expect(tokens[3].value).toBe(",");
    expect(tokens[4].type).toBe("string");
    expect(tokens[4].isUnclosed).toBe(true);
    expect(tokens[4].pos).toBe(20);
  });

  it("should handle float parameters", function() {
    var lexer = new Lexer("alias(metric, 0.002)");
    var tokens = lexer.tokenize();
    expect(tokens[4].type).toBe("number");
    expect(tokens[4].value).toBe("0.002");
  });

  it("should handle bool parameters", function() {
    var lexer = new Lexer("alias(metric, true, false)");
    var tokens = lexer.tokenize();
    expect(tokens[4].type).toBe("bool");
    expect(tokens[4].value).toBe("true");
    expect(tokens[6].type).toBe("bool");
  });
});