http_assertions: assert that the msgAndArgs actually works in tests

This commit also adds the method `Failed() bool` to the mockTestingT
struct. This is usefull for asserting failure in tests

assert/assertions_test.go

@@ -2514,6 +2514,10 @@ func (m *mockTestingT) Errorf(format string, args ...interface{}) {
 	m.args = args
 }
 
+func (m *mockTestingT) Failed() bool {
+	return m.errorFmt != ""
+}
+
 func TestFailNowWithPlainTestingT(t *testing.T) {
 	mockT := &mockTestingT{}
 

assert/http_assertions_test.go

@@ -41,12 +41,13 @@ func TestHTTPSuccess(t *testing.T) {
 	assert.Equal(HTTPSuccess(mockT2, httpRedirect, "GET", "/", nil), false)
 	assert.True(mockT2.Failed())
 
-	mockT3 := new(testing.T)
+	mockT3 := new(mockTestingT)
 	assert.Equal(HTTPSuccess(
 		mockT3, httpError, "GET", "/", nil,
 		"was not expecting a failure here",
 	), false)
 	assert.True(mockT3.Failed())
+	assert.Contains(mockT3.errorString(), "was not expecting a failure here")
 
 	mockT4 := new(testing.T)
 	assert.Equal(HTTPSuccess(mockT4, httpStatusCode, "GET", "/", nil), false)
@@ -60,12 +61,13 @@ func TestHTTPSuccess(t *testing.T) {
 func TestHTTPRedirect(t *testing.T) {
 	assert := New(t)
 
-	mockT1 := new(testing.T)
+	mockT1 := new(mockTestingT)
 	assert.Equal(HTTPRedirect(
 		mockT1, httpOK, "GET", "/", nil,
 		"was expecting a 3xx status code. Got 200.",
 	), false)
 	assert.True(mockT1.Failed())
+	assert.Contains(mockT1.errorString(), "was expecting a 3xx status code. Got 200.")
 
 	mockT2 := new(testing.T)
 	assert.Equal(HTTPRedirect(mockT2, httpRedirect, "GET", "/", nil), true)
@@ -87,12 +89,13 @@ func TestHTTPError(t *testing.T) {
 	assert.Equal(HTTPError(mockT1, httpOK, "GET", "/", nil), false)
 	assert.True(mockT1.Failed())
 
-	mockT2 := new(testing.T)
+	mockT2 := new(mockTestingT)
 	assert.Equal(HTTPError(
 		mockT2, httpRedirect, "GET", "/", nil,
 		"Expected this request to error out. But it didn't",
 	), false)
 	assert.True(mockT2.Failed())
+	assert.Contains(mockT2.errorString(), "Expected this request to error out. But it didn't")
 
 	mockT3 := new(testing.T)
 	assert.Equal(HTTPError(mockT3, httpError, "GET", "/", nil), true)
@@ -114,12 +117,13 @@ func TestHTTPStatusCode(t *testing.T) {
 	assert.Equal(HTTPStatusCode(mockT2, httpRedirect, "GET", "/", nil, http.StatusSwitchingProtocols), false)
 	assert.True(mockT2.Failed())
 
-	mockT3 := new(testing.T)
+	mockT3 := new(mockTestingT)
 	assert.Equal(HTTPStatusCode(
 		mockT3, httpError, "GET", "/", nil, http.StatusSwitchingProtocols,
 		"Expected the status code to be %d", http.StatusSwitchingProtocols,
 	), false)
 	assert.True(mockT3.Failed())
+	assert.Contains(mockT3.errorString(), "Expected the status code to be 101")
 
 	mockT4 := new(testing.T)
 	assert.Equal(HTTPStatusCode(mockT4, httpStatusCode, "GET", "/", nil, http.StatusSwitchingProtocols), true)
@@ -179,7 +183,7 @@ func TestHTTPRequestWithParams(t *testing.T) {
 
 func TestHttpBody(t *testing.T) {
 	assert := New(t)
-	mockT := new(testing.T)
+	mockT := new(mockTestingT)
 
 	assert.True(HTTPBodyContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "Hello, World!"))
 	assert.True(HTTPBodyContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "World"))
@@ -191,6 +195,7 @@ func TestHttpBody(t *testing.T) {
 		"Expected the request body to not contain 'World'. But it did.",
 	))
 	assert.True(HTTPBodyNotContains(mockT, httpHelloName, "GET", "/", url.Values{"name": []string{"World"}}, "world"))
+	assert.Contains(mockT.errorString(), "Expected the request body to not contain 'World'. But it did.")
 
 	assert.True(HTTPBodyContains(mockT, httpReadBody, "GET", "/", nil, "hello"))
 }