113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
// Copyright 2020 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package classifier
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import (
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"fmt"
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"testing"
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)
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func TestDictionary(t *testing.T) {
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d := newDictionary()
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if len(d.words) > 0 {
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t.Errorf("new dictionary should not have words populated")
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}
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if len(d.indices) > 0 {
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t.Errorf("new dictionary should not have indices populated")
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}
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// Add a word to the dictionary
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d.add("hello")
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// verify internal contents
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if got := len(d.words); got != 1 {
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t.Errorf("dictionary has %d words, expected 1", got)
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}
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if got := len(d.indices); got != 1 {
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t.Errorf("dictionary has %d indices, expected 1", got)
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}
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if got := d.getIndex("hello"); got != 1 {
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t.Errorf("dictionary index: got %d, want 1", got)
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}
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if got := d.getWord(1); got != "hello" {
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t.Errorf("dictionary word: got %q, want %q", got, "hello")
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}
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// Adding the same word to the dictionary doesn't change the dictionary
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d.add("hello")
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// verify internal contents
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if got := len(d.words); got != 1 {
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t.Errorf("dictionary has %d words, expected 1", got)
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}
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if got := len(d.indices); got != 1 {
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t.Errorf("dictionary has %d indices, expected 1", got)
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}
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if got := d.getIndex("hello"); got != 1 {
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t.Errorf("dictionary index: got %d, want 1", got)
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}
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if got := d.getWord(1); got != "hello" {
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t.Errorf("dictionary word: got %q, want %q", got, "hello")
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}
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// Fetching an unknown index returns the special value
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if got := d.getWord(2); got != unknownWord {
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t.Errorf("dictionary word: got %q, want %q", got, unknownWord)
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}
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// Fetching an unknown word returns the special value
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if got := d.getIndex("unknown"); got != unknownIndex {
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t.Errorf("dictionary word: got %d, want %d", got, unknownIndex)
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}
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}
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func TestComputeQ(t *testing.T) {
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tests := []struct {
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threshold float64
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expected int
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}{
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{
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threshold: .9,
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expected: 9,
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},
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{
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threshold: .8,
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expected: 4,
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},
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{
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threshold: .67,
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expected: 2,
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},
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{
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threshold: .5,
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expected: 1,
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},
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{
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threshold: 0.0,
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expected: 1,
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},
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{
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threshold: 1.0,
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expected: 10,
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},
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}
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for i, test := range tests {
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t.Run(fmt.Sprintf("threshold test %d", i), func(t *testing.T) {
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if actual := computeQ(test.threshold); actual != test.expected {
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t.Errorf("got %v want %v", actual, test.expected)
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}
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})
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}
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}
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