Initialise

reverse-string/reverse_string_test.go

@@ -0,0 +1,47 @@
+package reverse
+
+import (
+	"testing"
+	"testing/quick"
+)
+
+func TestReverse(t *testing.T) {
+	for _, testCase := range append(testCases, multiByteCases...) {
+		if res := Reverse(testCase.input); res != testCase.expected {
+			t.Fatalf("FAIL: %s(%s)\nExpected: %q\nActual: %q",
+				testCase.description, testCase.input, testCase.expected, res)
+		}
+		t.Logf("PASS: %s", testCase.description)
+	}
+}
+
+func TestReverseOfReverse(t *testing.T) {
+	assertion := func(s string) bool {
+		return s == Reverse(Reverse(s))
+	}
+	if err := quick.Check(assertion, nil); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func BenchmarkReverse(b *testing.B) {
+	if testing.Short() {
+		b.Skip("skipping benchmark in short mode.")
+	}
+	for i := 0; i < b.N; i++ {
+		for _, test := range testCases {
+			Reverse(test.input)
+		}
+	}
+}
+
+// mutiByteCases adds UTF-8 multi-byte case,
+// since the canonical-data.json (generator data source for cases_test.go)
+// doesn't have any such cases.
+var multiByteCases = []reverseTestCase{
+	{
+		description: "a multi-byte test case",
+		input:       "Hello, 世界",
+		expected:    "界世 ,olleH",
+	},
+}