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77 lines
2.2 KiB
Ruby
77 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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require 'rails_helper'
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require 'onpdiff'
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describe ONPDiff do
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describe "diff" do
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it "returns an empty array when there is no content to diff" do
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expect(ONPDiff.new("", "").diff).to eq([])
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end
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it "returns an array with the operation code for each element" do
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expect(ONPDiff.new("abcd", "abef").diff).to eq([["a", :common], ["b", :common], ["e", :add], ["f", :add], ["c", :delete], ["d", :delete]])
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end
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it "bails out on large diffs" do
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a = SecureRandom.alphanumeric(5_000)
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b = SecureRandom.alphanumeric(5_000)
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expect(ONPDiff.new(a, b).diff).to eq([])
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end
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end
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describe "short_diff" do
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it "returns an empty array when there is no content to diff" do
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expect(ONPDiff.new("", "").short_diff).to eq([])
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end
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it "returns an array with the operation code for each element" do
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expect(ONPDiff.new("abc", "acd").short_diff).to eq([["a", :common], ["b", :delete], ["c", :common], ["d", :add]])
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end
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it "returns an array with sequencially similar operations merged" do
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expect(ONPDiff.new("abcd", "abef").short_diff).to eq([["ab", :common], ["ef", :add], ["cd", :delete]])
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end
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end
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describe "paragraph_diff" do
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it "returns an empty array when there is no content to diff" do
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expect(ONPDiff.new("", "").paragraph_diff).to eq([])
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end
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it "returns an array with the operation code for each element" do
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expect(ONPDiff.new("abc", "acd").paragraph_diff).to eq([["a", :common], ["b", :delete], ["c", :common], ["d", :add]])
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end
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it "pairs as many elements as possible" do
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expect(ONPDiff.new("abcd", "abef").paragraph_diff).to eq([
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["a", :common], ["b", :common],
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["e", :add], ["c", :delete],
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["f", :add], ["d", :delete]
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])
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expect(ONPDiff.new("abcde", "abfg").paragraph_diff).to eq([
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["a", :common], ["b", :common],
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["c", :delete],
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["d", :delete], ["f", :add],
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["e", :delete], ["g", :add]
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])
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expect(ONPDiff.new("abcd", "abefg").paragraph_diff).to eq([
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["a", :common], ["b", :common],
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["e", :add],
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["f", :add], ["c", :delete],
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["g", :add], ["d", :delete]
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])
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end
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end
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end
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