Check if all the zeros of an array are at the end

all_zeros_at_end.rb

def all_zeros_at_end(array)
  array.drop_while(&:nonzero?).all?(&:zero?)
end

all_zeros_at_end_spec.rb

require "./all_zeros_at_end"

describe "all_zeros_at_end" do
  it "returns true for an empty array" do
    expect(all_zeros_at_end([])).to eq true
  end

  it "returns true for an array without zeros" do
    expect(all_zeros_at_end([1, 2, 3])).to eq true
  end

  it "returns true for an array with one zero at the end" do
    expect(all_zeros_at_end([1, 2, 3, 0])).to eq true
  end

  it "returns true for an array with many zeros at the end" do
    expect(all_zeros_at_end([1, 2, 3, 0, 0])).to eq true
  end

  it "returns true for an array with zeros only" do
    expect(all_zeros_at_end([0, 0, 0])).to eq true
  end

  it "returns false for an array with a zero in the middle" do
    expect(all_zeros_at_end([1, 0, 2])).to eq false
  end

  it "returns false for an array with a zero at the beginning" do
    expect(all_zeros_at_end([0, 1, 2])).to eq false
  end

  it "returns false for an array with a zero in the middle even if it ends with another zero" do
    expect(all_zeros_at_end([1, 0, 2, 0, 0])).to eq false
  end
end