Yaml binding (#1618)

* Add YAML binding for application/x-yaml.

* Add YAML binding methods to Context.

* Review fixes.

* Revert accidentally removed import.

context_test.go

@@ -1380,6 +1380,23 @@ func TestContextBindWithQuery(t *testing.T) {
 	assert.Equal(t, 0, w.Body.Len())
 }
 
+func TestContextBindWithYAML(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString("foo: bar\nbar: foo"))
+	c.Request.Header.Add("Content-Type", MIMEXML) // set fake content-type
+
+	var obj struct {
+		Foo string `yaml:"foo"`
+		Bar string `yaml:"bar"`
+	}
+	assert.NoError(t, c.BindYAML(&obj))
+	assert.Equal(t, "foo", obj.Bar)
+	assert.Equal(t, "bar", obj.Foo)
+	assert.Equal(t, 0, w.Body.Len())
+}
+
 func TestContextBadAutoBind(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
@@ -1470,6 +1487,23 @@ func TestContextShouldBindWithQuery(t *testing.T) {
 	assert.Equal(t, 0, w.Body.Len())
 }
 
+func TestContextShouldBindWithYAML(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString("foo: bar\nbar: foo"))
+	c.Request.Header.Add("Content-Type", MIMEXML) // set fake content-type
+
+	var obj struct {
+		Foo string `yaml:"foo"`
+		Bar string `yaml:"bar"`
+	}
+	assert.NoError(t, c.ShouldBindYAML(&obj))
+	assert.Equal(t, "foo", obj.Bar)
+	assert.Equal(t, "bar", obj.Foo)
+	assert.Equal(t, 0, w.Body.Len())
+}
+
 func TestContextBadAutoShouldBind(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)