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