Merge pull request #1 from Kryniol/feature/new-matchers

New All and ContentTypeEquals matchers

Author: RiiD

matcher/all.go

@@ -0,0 +1,19 @@
+package matcher
+
+import (
+	"github.com/riid/messenger"
+)
+
+func All(matchers ...messenger.Matcher) messenger.Matcher {
+	return MatchFunc(
+		func(e messenger.Envelope) bool {
+			for _, m := range matchers {
+				if !m.Matches(e) {
+					return false
+				}
+			}
+
+			return true
+		},
+	)
+}

matcher/all_test.go

@@ -0,0 +1,69 @@
+package matcher
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/riid/messenger"
+	"github.com/riid/messenger/envelope"
+)
+
+type matcherStub struct {
+	ret bool
+}
+
+func (m *matcherStub) Matches(_ messenger.Envelope) bool {
+	return m.ret
+}
+
+func TestAll(t *testing.T) {
+	positive := &matcherStub{true}
+	negative := &matcherStub{false}
+	e := envelope.FromMessage([]byte{})
+
+	type testCase struct {
+		matchers []messenger.Matcher
+		expected bool
+	}
+
+	suite := map[string]testCase{
+		"no matchers": {
+			expected: true,
+		},
+		"all positive matchers": {
+			matchers: []messenger.Matcher{
+				positive,
+				positive,
+			},
+			expected: true,
+		},
+		"all negative matchers": {
+			matchers: []messenger.Matcher{
+				negative,
+				negative,
+			},
+			expected: false,
+		},
+		"one negative matcher": {
+			matchers: []messenger.Matcher{
+				positive,
+				negative,
+				positive,
+			},
+			expected: false,
+		},
+	}
+
+	for name, tc := range suite {
+		tc := tc
+		t.Run(
+			name, func(t *testing.T) {
+				t.Parallel()
+
+				m := All(tc.matchers...)
+				assert.Equal(t, tc.expected, m.Matches(e))
+			},
+		)
+	}
+}

matcher/content_type_equals.go

@@ -0,0 +1,14 @@
+package matcher
+
+import (
+	"github.com/riid/messenger"
+	"github.com/riid/messenger/envelope"
+)
+
+func ContentTypeEquals(t string) messenger.Matcher {
+	return MatchFunc(
+		func(e messenger.Envelope) bool {
+			return envelope.ContentType(e) == t
+		},
+	)
+}

matcher/content_type_equals_test.go

@@ -0,0 +1,18 @@
+package matcher
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/riid/messenger/envelope"
+)
+
+func TestContentTypeEquals(t *testing.T) {
+	e := envelope.FromMessage([]byte{})
+
+	m := ContentTypeEquals("application/json")
+	assert.False(t, m.Matches(e))
+	assert.True(t, m.Matches(envelope.WithContentType(e, "application/json")))
+	assert.False(t, m.Matches(envelope.WithContentType(e, "text/plain")))
+}