66 lines
1.3 KiB
Crystal
66 lines
1.3 KiB
Crystal
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require "./spec_helper"
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describe HeapHash do
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describe "#[]" do
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hh = HeapHash(String, Int32).new
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it "correctly assigns new keys" do
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hh["a"] = 5
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hh["b"] = 3
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hh["c"] = 10
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hh["a"].should eq(5)
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hh["b"].should eq(3)
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hh["c"].should eq(10)
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hh.size.should eq(3)
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end
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it "correctly updates the value of a key" do
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hh["a"] = 0
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hh["a"].should eq(0)
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hh.size.should eq(3)
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end
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it "returns nil for non-existent keys" do
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hh["?"]?.should be_nil
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end
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it "throws for non-existent keys" do
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expect_raises(KeyError) do
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hh["?"]
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end
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end
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end
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describe "#pop" do
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it "pops keys in the right oder" do
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hh = HeapHash(String, Int32).new
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expect_raises(IndexError) do
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hh.pop
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end
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hh["last"] = 1
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hh["first"] = 10
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hh["medium"] = 5
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hh.pop.should eq({"first", 10})
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hh.pop.should eq({"medium", 5})
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hh.pop.should eq({"last", 1})
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end
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end
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describe "#delete" do
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it "doesn't break the heap property" do
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hh = HeapHash(String, Int32).new
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hh["last"] = 1
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hh["first"] = 10
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hh["medium"] = 5
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popped = hh.delete "last"
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popped.should eq({"last", 1})
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hh.pop.should eq({"first", 10})
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hh.pop.should eq({"medium", 5})
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end
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end
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end
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