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111 lines
3.8 KiB
Elixir
111 lines
3.8 KiB
Elixir
defmodule Livebook.JSInteropTest do
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use ExUnit.Case, async: true
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alias Livebook.{JSInterop, Delta}
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describe "apply_delta_to_string/2" do
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test "prepend" do
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string = "cats"
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delta = Delta.new() |> Delta.insert("fat ")
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assert JSInterop.apply_delta_to_string(delta, string) == "fat cats"
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end
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test "insert in the middle" do
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string = "cats"
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delta = Delta.new() |> Delta.retain(3) |> Delta.insert("'")
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assert JSInterop.apply_delta_to_string(delta, string) == "cat's"
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end
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test "delete" do
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string = "cats"
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delta = Delta.new() |> Delta.retain(1) |> Delta.delete(2)
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assert JSInterop.apply_delta_to_string(delta, string) == "cs"
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end
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test "replace" do
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string = "cats"
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delta = Delta.new() |> Delta.retain(1) |> Delta.delete(2) |> Delta.insert("ar")
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assert JSInterop.apply_delta_to_string(delta, string) == "cars"
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end
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test "retain skips the given number UTF-16 code units" do
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# 🚀 consists of 2 UTF-16 code units, so JavaScript assumes "🚀".length is 2
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string = "🚀 cats"
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# Skip the emoji (2 code unit) and the space (1 code unit)
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delta = Delta.new() |> Delta.retain(3) |> Delta.insert("my ")
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assert JSInterop.apply_delta_to_string(delta, string) == "🚀 my cats"
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end
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test "delete removes the given number UTF-16 code units" do
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# 🚀 consists of 2 UTF-16 code units, so JavaScript assumes "🚀".length is 2
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string = "🚀 cats"
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delta = Delta.new() |> Delta.delete(2)
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assert JSInterop.apply_delta_to_string(delta, string) == " cats"
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end
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end
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describe "diff/2" do
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test "insert" do
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assert JSInterop.diff("cats", "cat's") ==
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Delta.new() |> Delta.retain(3) |> Delta.insert("'")
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end
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test "delete" do
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assert JSInterop.diff("cats", "cs") ==
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Delta.new() |> Delta.retain(1) |> Delta.delete(2)
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end
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test "replace" do
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assert JSInterop.diff("cats", "cars") ==
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Delta.new() |> Delta.retain(2) |> Delta.delete(1) |> Delta.insert("r")
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end
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test "retain skips the given number UTF-16 code units" do
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assert JSInterop.diff("🚀 cats", "🚀 my cats") ==
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Delta.new() |> Delta.retain(3) |> Delta.insert("my ")
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end
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test "delete removes the given number UTF-16 code units" do
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assert JSInterop.diff("🚀 cats", " cats") ==
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Delta.new() |> Delta.delete(2)
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end
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end
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describe "js_column_to_elixir/2" do
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test "keeps the column as is for ASCII characters" do
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column = 4
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line = "String.replace"
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assert JSInterop.js_column_to_elixir(column, line) == 4
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end
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test "shifts the column given characters spanning multiple UTF-16 code units" do
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# 🚀 consists of 2 UTF-16 code units, so JavaScript assumes "🚀".length is 2
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column = 7
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line = "🚀🚀 String.replace"
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assert JSInterop.js_column_to_elixir(column, line) == 5
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end
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test "returns proper column if a middle UTF-16 code unit is given" do
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# 🚀 consists of 2 UTF-16 code units, so JavaScript assumes "🚀".length is 2
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# 3th and 4th code unit correspond to the second 🚀
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column = 3
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line = "🚀🚀 String.replace"
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assert JSInterop.js_column_to_elixir(column, line) == 2
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end
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end
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describe "elixir_column_to_js/2" do
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test "keeps the column as is for ASCII characters" do
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column = 4
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line = "String.replace"
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assert JSInterop.elixir_column_to_js(column, line) == 4
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end
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test "shifts the column given characters spanning multiple UTF-16 code units" do
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# 🚀 consists of 2 UTF-16 code units, so JavaScript assumes "🚀".length is 2
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column = 5
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line = "🚀🚀 String.replace"
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assert JSInterop.elixir_column_to_js(column, line) == 7
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end
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end
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end
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