scrabble-score: create test case generator

exercises/scrabble-score/.meta/gen.go

@@ -0,0 +1,45 @@
+// +build ignore
+
+package main
+
+import (
+	"log"
+	"text/template"
+
+	"../../../gen"
+)
+
+func main() {
+	t, err := template.New("").Parse(tmpl)
+	if err != nil {
+		log.Fatal(err)
+	}
+	var j js
+	if err := gen.Gen("scrabble-score", &j, t); err != nil {
+		log.Fatal(err)
+	}
+}
+
+// The JSON structure we expect to be able to unmarshal into
+type js struct {
+	Cases []struct {
+		Description string
+		Input       string
+		Expected    int
+	}
+}
+
+// template applied to above data structure generates the Go test cases
+var tmpl = `package scrabble
+
+{{.Header}}
+
+type scrabbleTest struct {
+	input       string
+	expected    int
+}
+
+var scrabbleScoreTests = []scrabbleTest {
+{{range .J.Cases}}{ "{{.Input}}", {{.Expected}}}, // {{.Description}}
+{{end}}}
+`

exercises/scrabble-score/cases_test.go

@@ -0,0 +1,24 @@
+package scrabble
+
+// Source: exercism/x-common
+// Commit: 11ed503 scrabble-score: Make canonical-data.json compliant
+// x-common version: 1.0.0
+
+type scrabbleTest struct {
+	input    string
+	expected int
+}
+
+var scrabbleScoreTests = []scrabbleTest{
+	{"a", 1},                // lowercase letter
+	{"A", 1},                // uppercase letter
+	{"f", 4},                // valuable letter
+	{"at", 2},               // short word
+	{"zoo", 12},             // short, valuable word
+	{"street", 6},           // medium word
+	{"quirky", 22},          // medium, valuable word
+	{"OxyphenButazone", 41}, // long, mixed-case word
+	{"pinata", 8},           // english-like word
+	{"", 0},                 // empty input
+	{"abcdefghijklmnopqrstuvwxyz", 87}, // entire alphabet available
+}

exercises/scrabble-score/example.go

@@ -5,7 +5,7 @@ import (
 )
 
 // testVersion tracks the version of the exercise.
-const testVersion = 4
+const testVersion = 5
 
 var letterValues = map[rune]int{
 	'a': 1, 'b': 3, 'c': 3, 'd': 2, 'e': 1,

exercises/scrabble-score/scrabble_score_test.go

@@ -2,21 +2,7 @@ package scrabble
 
 import "testing"
 
-const targetTestVersion = 4
-
-var tests = []struct {
-	input    string
-	expected int
-}{
-	{"", 0},
-	{" \t\n", 0},
-	{"a", 1},
-	{"f", 4},
-	{"street", 6},
-	{"quirky", 22},
-	{"OXYPHENBUTAZONE", 41},
-	{"alacrity", 13},
-}
+const targetTestVersion = 5
 
 func TestTestVersion(t *testing.T) {
 	if testVersion != targetTestVersion {
@@ -25,7 +11,7 @@ func TestTestVersion(t *testing.T) {
 }
 
 func TestScore(t *testing.T) {
-	for _, test := range tests {
+	for _, test := range scrabbleScoreTests {
 		if actual := Score(test.input); actual != test.expected {
 			t.Errorf("Score(%q) expected %d, Actual %d", test.input, test.expected, actual)
 		}
@@ -34,7 +20,7 @@ func TestScore(t *testing.T) {
 
 func BenchmarkScore(b *testing.B) {
 	for i := 0; i < b.N; i++ {
-		for _, test := range tests {
+		for _, test := range scrabbleScoreTests {
 			Score(test.input)
 		}
 	}