change: add unittest for EqualLength

builtin/assertion_test.go

@@ -41,3 +41,23 @@ func TestEndsWith(t *testing.T) {
 		}
 	}
 }
+
+func TestEqualLength(t *testing.T) {
+	testData := []struct {
+		raw      interface{}
+		expected int
+	}{
+		{"", 0},
+		{[]string{}, 0},
+		{map[string]interface{}{}, 0},
+		{"a", 1},
+		{[]string{"a"}, 1},
+		{map[string]interface{}{"a": 123}, 1},
+	}
+
+	for _, data := range testData {
+		if !assert.True(t, EqualLength(t, data.expected, data.raw)) {
+			t.Fail()
+		}
+	}
+}