Function TestValueBinder_CustomFunc

binder_test.go:267–340

(t *testing.T)

}

func TestValueBinder_CustomFunc(t *testing.T) {
	var testCases = []struct {
		expectValue       any
		name              string
		whenURL           string
		givenFuncErrors   []error
		expectParamValues []string
		expectErrors      []string
		givenFailFast     bool
	}{
		{
			name:              "ok, binds value",
			whenURL:           "/search?nr=en&id=1&id=100",
			expectParamValues: []string{"1", "100"},
			expectValue:       int64(1000),
		},
		{
			name:              "ok, params values empty, value is not changed",
			whenURL:           "/search?nr=en",
			expectParamValues: []string{},
			expectValue:       int64(99),
		},
		{
			name:              "nok, previous errors fail fast without binding value",
			givenFailFast:     true,
			whenURL:           "/search?nr=en&id=1&id=100",
			expectParamValues: []string{"1", "100"},
			expectValue:       int64(99),
			expectErrors:      []string{"previous error"},
		},
		{
			name: "nok, func returns errors",
			givenFuncErrors: []error{
				errors.New("first error"),
				errors.New("second error"),
			},
			whenURL:           "/search?nr=en&id=1&id=100",
			expectParamValues: []string{"1", "100"},
			expectValue:       int64(99),
			expectErrors:      []string{"first error", "second error"},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			c := createTestContext(tc.whenURL, nil, nil)
			b := QueryParamsBinder(c).FailFast(tc.givenFailFast)
			if tc.givenFailFast {
				b.errors = []error{errors.New("previous error")}
			}

			id := int64(99)
			givenCustomFunc := func(values []string) []error {
				assert.Equal(t, tc.expectParamValues, values)
				if tc.givenFuncErrors == nil {
					id = 1000 // emulated conversion and setting value
					return nil
				}