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.svn/pristine/56/56917ecd3dd2f5232b9c9c3ca1dcfaed71e2c9bb.svn-base

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+package stringUtil
+
+import (
+	"testing"
+)
+
+func TestSimilarity(t *testing.T) {
+	source := ""
+	target := ""
+	expectedDistance := 0
+	expectedSimilarity := 0.0
+	gotDistance, gotSimilarity := Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+
+	source = "Hello"
+	target = ""
+	expectedDistance = 5
+	expectedSimilarity = 0.0
+	gotDistance, gotSimilarity = Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+
+	source = ""
+	target = "Hello"
+	expectedDistance = 5
+	expectedSimilarity = 0.0
+	gotDistance, gotSimilarity = Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+
+	source = "Helo"
+	target = "Hello"
+	expectedDistance = 1
+	expectedSimilarity = 4.0 / 5.0
+	gotDistance, gotSimilarity = Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+
+	source = "kitten"
+	target = "sitten"
+	expectedDistance = 1
+	expectedSimilarity = 5.0 / 6.0
+	gotDistance, gotSimilarity = Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+
+	source = "Michael Jordan"
+	target = "Michael Jordan"
+	expectedDistance = 0
+	expectedSimilarity = 1
+	gotDistance, gotSimilarity = Similarity(source, target)
+	if gotDistance != expectedDistance {
+		t.Errorf("Expected to get %d, now got %d", expectedDistance, gotDistance)
+		return
+	}
+	if gotSimilarity != expectedSimilarity {
+		t.Errorf("Expected to get %f, now got %f", expectedSimilarity, gotSimilarity)
+		return
+	}
+}