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82 lines
2.3 KiB
Ruby
82 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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RSpec.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(
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[["a", :common], ["b", :common], ["e", :add], ["f", :add], ["c", :delete], ["d", :delete]],
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)
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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(
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[["a", :common], ["b", :delete], ["c", :common], ["d", :add]],
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)
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end
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it "returns an array with sequentially similar operations merged" do
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expect(ONPDiff.new("abcd", "abef").short_diff).to eq(
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[["ab", :common], ["ef", :add], ["cd", :delete]],
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)
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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(
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[["a", :common], ["b", :delete], ["c", :common], ["d", :add]],
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)
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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], ["e", :add], ["c", :delete], ["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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[
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["a", :common],
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["b", :common],
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["c", :delete],
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["d", :delete],
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["f", :add],
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["e", :delete],
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["g", :add],
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],
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)
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expect(ONPDiff.new("abcd", "abefg").paragraph_diff).to eq(
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[
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["a", :common],
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["b", :common],
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["e", :add],
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["f", :add],
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["c", :delete],
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["g", :add],
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["d", :delete],
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],
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)
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end
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end
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end
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