ce4c83ff
 wxy
初始提交
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"use strict"
const TransformableString = require("../TransformableString")
it("should be a function", () => {
expect(typeof TransformableString).toBe("function")
})
describe("toString", () => {
it("should return the original string if no transform are made", () => {
const ts = new TransformableString("foo")
expect(ts.toString()).toBe("foo")
})
})
describe("replace", () => {
it("should replace a slice", () => {
const ts = new TransformableString("foo")
ts.replace(1, 2, "OO")
expect(ts.toString()).toBe("fOOo")
})
it("should throw if trying to replace the same thing twice", () => {
const ts = new TransformableString("abcd")
ts.replace(1, 3, "OO")
expect(() => ts.replace(2, 4, "OO")).toThrow()
expect(() => ts.replace(0, 2, "OO")).toThrow()
})
it("should replace adjacent slices", () => {
const ts = new TransformableString("abcde")
ts.replace(2, 3, "OO")
ts.replace(3, 4, "MM")
ts.replace(1, 2, "NN")
expect(ts.toString()).toBe("aNNOOMMe")
})
})
describe("originalIndex", () => {
it("should return the same index if nothing changed", () => {
const ts = new TransformableString("abcde")
expect(ts.originalIndex(0)).toBe(0)
expect(ts.originalIndex(1)).toBe(1)
expect(ts.originalIndex(4)).toBe(4)
})
it("should throw if the index is invalid", () => {
const ts = new TransformableString("abcde")
expect(() => ts.originalIndex(-1)).toThrow()
expect(() => ts.originalIndex(6)).toThrow()
})
it("should return the original index of a string with removed parts", () => {
const ts = new TransformableString("abcde")
ts.replace(1, 2, "")
ts.replace(3, 4, "")
expect(ts.toString()).toBe("ace")
expect(ts.originalIndex(0)).toBe(0) // a
expect(ts.originalIndex(1)).toBe(2) // c
expect(ts.originalIndex(2)).toBe(4) // e
expect(ts.originalIndex(3)).toBe(5) // index directly after the end is allowed
expect(() => ts.originalIndex(4)).toThrow()
})
it("should return the original index of a string with added parts", () => {
const ts = new TransformableString("ace")
ts.replace(1, 1, "b")
ts.replace(2, 2, "d")
expect(ts.toString()).toBe("abcde")
expect(ts.originalIndex(0)).toBe(0) // a
expect(ts.originalIndex(1)).toBe(undefined)
expect(ts.originalIndex(2)).toBe(1) // c
expect(ts.originalIndex(3)).toBe(undefined)
expect(ts.originalIndex(4)).toBe(2) // e
expect(ts.originalIndex(5)).toBe(3) // index directly after the end is allowed
expect(() => ts.originalIndex(6)).toThrow()
})
it("should return the original index of a string with added parts (2)", () => {
const ts = new TransformableString("ab")
ts.replace(1, 1, "XX")
expect(ts.toString()).toBe("aXXb")
expect(ts.originalIndex(0)).toBe(0) // a
expect(ts.originalIndex(1)).toBe(undefined)
expect(ts.originalIndex(2)).toBe(undefined)
expect(ts.originalIndex(3)).toBe(1) // b
})
it("should return the last index of the last block if the index is after the end", () => {
const ts = new TransformableString("abcd")
ts.replace(2, 4, "X")
expect(ts.toString()).toBe("abX")
expect(ts.originalIndex(0)).toBe(0) // a
expect(ts.originalIndex(1)).toBe(1) // b
expect(ts.originalIndex(2)).toBe(undefined)
expect(ts.originalIndex(3)).toBe(3) // c
})
})
describe("originalLocation", () => {
it("should return the same location if nothing changed", () => {
const ts = new TransformableString("aaaa\nbbbb\ncccc")
expect(ts.originalLocation({ line: 1, column: 1 })).toEqual({
line: 1,
column: 1,
})
expect(ts.originalLocation({ line: 1, column: 3 })).toEqual({
line: 1,
column: 3,
})
expect(ts.originalLocation({ line: 2, column: 1 })).toEqual({
line: 2,
column: 1,
})
})
it("should return the original location of a string with removed parts", () => {
const ts = new TransformableString("aaaa\nbbbb\ncccc")
ts.replace(3, 6, "")
expect(ts.toString()).toBe("aaabbb\ncccc")
expect(ts.originalLocation({ line: 1, column: 1 })).toEqual({
line: 1,
column: 1,
})
expect(ts.originalLocation({ line: 1, column: 4 })).toEqual({
line: 2,
column: 2,
})
expect(ts.originalLocation({ line: 2, column: 1 })).toEqual({
line: 3,
column: 1,
})
})
it("should return the original location of a string with added parts", () => {
const ts = new TransformableString("aaaa\nbbbbcccc")
ts.replace(9, 9, "X\nX")
expect(ts.toString()).toBe("aaaa\nbbbbX\nXcccc")
expect(ts.originalLocation({ line: 1, column: 1 })).toEqual({
line: 1,
column: 1,
})
expect(ts.originalLocation({ line: 1, column: 4 })).toEqual({
line: 1,
column: 4,
})
expect(ts.originalLocation({ line: 2, column: 1 })).toEqual({
line: 2,
column: 1,
})
expect(ts.originalLocation({ line: 2, column: 5 })).toEqual(undefined)
})
})
describe("getOriginalLine", () => {
it("returns original lines", () => {
const ts = new TransformableString("aa\nbb\r\ncc")
expect(() => ts.getOriginalLine(0)).toThrow()
expect(ts.getOriginalLine(1)).toEqual("aa")
expect(ts.getOriginalLine(2)).toEqual("bb")
expect(ts.getOriginalLine(3)).toEqual("cc")
expect(() => ts.getOriginalLine(4)).toThrow()
})
})
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