APIv4 DELETE /users/{user_id}/posts/{post_id}/reactions/name (#6117)

* APIv4 DELETE /users/{user_id}/posts/{post_id}/reactions/name

* updated v3 deleteReaction endpoint

* update parameter of app.DeleteReactionForPost()

* update utils.IsValidAlphaNum, add utils.IsValidAlphaNumHyphenUnderscore, and add related tests

model/utils_test.go

@@ -137,3 +137,191 @@ func TestParseHashtags(t *testing.T) {
 		}
 	}
 }
+
+func TestIsValidAlphaNum(t *testing.T) {
+	cases := []struct {
+		Input  string
+		Result bool
+	}{
+		{
+			Input:  "test",
+			Result: true,
+		},
+		{
+			Input:  "test-name",
+			Result: true,
+		},
+		{
+			Input:  "test--name",
+			Result: true,
+		},
+		{
+			Input:  "test__name",
+			Result: true,
+		},
+		{
+			Input:  "-",
+			Result: false,
+		},
+		{
+			Input:  "__",
+			Result: false,
+		},
+		{
+			Input:  "test-",
+			Result: false,
+		},
+		{
+			Input:  "test--",
+			Result: false,
+		},
+		{
+			Input:  "test__",
+			Result: false,
+		},
+		{
+			Input:  "test:name",
+			Result: false,
+		},
+	}
+
+	for _, tc := range cases {
+		actual := IsValidAlphaNum(tc.Input)
+		if actual != tc.Result {
+			t.Fatalf("case: %v\tshould returned: %#v", tc, tc.Result)
+		}
+	}
+}
+
+func TestIsValidAlphaNumHyphenUnderscore(t *testing.T) {
+	casesWithFormat := []struct {
+		Input  string
+		Result bool
+	}{
+		{
+			Input:  "test",
+			Result: true,
+		},
+		{
+			Input:  "test-name",
+			Result: true,
+		},
+		{
+			Input:  "test--name",
+			Result: true,
+		},
+		{
+			Input:  "test__name",
+			Result: true,
+		},
+		{
+			Input:  "test_name",
+			Result: true,
+		},
+		{
+			Input:  "test_-name",
+			Result: true,
+		},
+		{
+			Input:  "-",
+			Result: false,
+		},
+		{
+			Input:  "__",
+			Result: false,
+		},
+		{
+			Input:  "test-",
+			Result: false,
+		},
+		{
+			Input:  "test--",
+			Result: false,
+		},
+		{
+			Input:  "test__",
+			Result: false,
+		},
+		{
+			Input:  "test:name",
+			Result: false,
+		},
+	}
+
+	for _, tc := range casesWithFormat {
+		actual := IsValidAlphaNumHyphenUnderscore(tc.Input, true)
+		if actual != tc.Result {
+			t.Fatalf("case: %v\tshould returned: %#v", tc, tc.Result)
+		}
+	}
+
+	casesWithoutFormat := []struct {
+		Input  string
+		Result bool
+	}{
+		{
+			Input:  "test",
+			Result: true,
+		},
+		{
+			Input:  "test-name",
+			Result: true,
+		},
+		{
+			Input:  "test--name",
+			Result: true,
+		},
+		{
+			Input:  "test__name",
+			Result: true,
+		},
+		{
+			Input:  "test_name",
+			Result: true,
+		},
+		{
+			Input:  "test_-name",
+			Result: true,
+		},
+		{
+			Input:  "-",
+			Result: true,
+		},
+		{
+			Input:  "_",
+			Result: true,
+		},
+		{
+			Input:  "test-",
+			Result: true,
+		},
+		{
+			Input:  "test--",
+			Result: true,
+		},
+		{
+			Input:  "test__",
+			Result: true,
+		},
+		{
+			Input:  ".",
+			Result: false,
+		},
+
+		{
+			Input:  "test,",
+			Result: false,
+		},
+		{
+			Input:  "test:name",
+			Result: false,
+		},
+	}
+
+	for _, tc := range casesWithoutFormat {
+		actual := IsValidAlphaNumHyphenUnderscore(tc.Input, false)
+		if actual != tc.Result {
+			t.Fatalf("case: '%v'\tshould returned: %#v", tc.Input, tc.Result)
+		}
+	}
+}