refactor: removed testify dependency and refactored existing unit tes…

…ts (#75)

.codeclimate.yml

@@ -1,3 +1,4 @@
 exclude_paths:
   - "**/mock_*.go"
-  - "**/*_test.go"
+  - "**/*_test.go"
+  - "assert/*"

assert/assertions.go

@@ -0,0 +1,243 @@
+package assert
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"reflect"
+	"runtime"
+	"strings"
+	"testing"
+	"unicode"
+	"unicode/utf8"
+)
+
+func IsType(t *testing.T, expectedType interface{}, object interface{}) bool {
+	if !objectsAreEqual(reflect.TypeOf(object), reflect.TypeOf(expectedType)) {
+		return fail(t, fmt.Sprintf("Object expected to be of type %v, but was %v", reflect.TypeOf(expectedType), reflect.TypeOf(object)))
+	}
+
+	return true
+}
+
+func Equal(t *testing.T, expected, actual interface{}) bool {
+	if objectsAreEqual(expected, actual) {
+		return true
+	}
+	return fail(t, fmt.Sprintf("Expected:\n%v\nBut Got:\n%v", expected, actual))
+}
+
+func Nil(t *testing.T, object interface{}) bool {
+	if isNil(object) {
+		return true
+	}
+	return fail(t, fmt.Sprintf("Expected nil, but got: %#v", object))
+}
+
+func True(t *testing.T, value bool) bool {
+	if !value {
+		return fail(t, "Should be true")
+	}
+	return true
+}
+
+func False(t *testing.T, value bool) bool {
+	if value {
+		return fail(t, "Should be false")
+	}
+	return true
+}
+
+func NoError(t *testing.T, err error) bool {
+	if err != nil {
+		return fail(t, fmt.Sprintf("Received unexpected error:\n%+v", err))
+	}
+	return true
+}
+
+func EqualError(t *testing.T, theError error, errString string) bool {
+	if !isError(t, theError) {
+		return false
+	}
+	expected := errString
+	actual := theError.Error()
+	// don't need to use deep equals here, we know they are both strings
+	if expected != actual {
+		return fail(t, fmt.Sprintf("Error message not equal:\n"+
+			"expected: %q\n"+
+			"actual  : %q", expected, actual))
+	}
+	return true
+}
+
+func ErrorContains(t *testing.T, theError error, contains string) bool {
+	if !isError(t, theError) {
+		return false
+	}
+
+	actual := theError.Error()
+	if !strings.Contains(actual, contains) {
+		return fail(t, fmt.Sprintf("Error %#v does not contain %#v", actual, contains))
+	}
+
+	return true
+}
+
+func objectsAreEqual(expected, actual interface{}) bool {
+	if expected == nil || actual == nil {
+		return expected == actual
+	}
+
+	exp, ok := expected.([]byte)
+	if !ok {
+		return reflect.DeepEqual(expected, actual)
+	}
+
+	act, ok := actual.([]byte)
+	if !ok {
+		return false
+	}
+	if exp == nil || act == nil {
+		return exp == nil && act == nil
+	}
+	return bytes.Equal(exp, act)
+}
+
+func isError(t *testing.T, err error) bool {
+	if err == nil {
+		return fail(t, "An error is expected but got nil.")
+	}
+	return true
+}
+
+func isNil(object interface{}) bool {
+	if object == nil {
+		return true
+	}
+
+	value := reflect.ValueOf(object)
+	switch value.Kind() {
+	case
+		reflect.Chan, reflect.Func,
+		reflect.Interface, reflect.Map,
+		reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
+
+		return value.IsNil()
+	default:
+		return false
+	}
+}
+
+func fail(t *testing.T, failureMessage string) bool {
+	content := []labeledContent{
+		{"Error Trace", strings.Join(callerInfo(), "\n\t\t\t")},
+		{"Error", failureMessage},
+	}
+	t.Errorf("\n%s", ""+labeledOutput(content...))
+
+	return false
+}
+
+func callerInfo() []string {
+
+	var pc uintptr
+	var ok bool
+	var file string
+	var line int
+	var name string
+
+	var callers []string
+	for i := 0; ; i++ {
+		pc, file, line, ok = runtime.Caller(i)
+		if !ok {
+			// The breaks below failed to terminate the loop, and we ran off the
+			// end of the call stack.
+			break
+		}
+
+		// This is a huge edge case, but it will panic if this is the case, see #180
+		if file == "<autogenerated>" {
+			break
+		}
+
+		f := runtime.FuncForPC(pc)
+		if f == nil {
+			break
+		}
+		name = f.Name()
+
+		// testing.tRunner is the standard library function that calls
+		// tests. Subtests are called directly by tRunner, without going through
+		// the Test/Benchmark/Example function that contains the t.Run calls, so
+		// with subtests we should break when we hit tRunner, without adding it
+		// to the list of callers.
+		if name == "testing.tRunner" {
+			break
+		}
+
+		parts := strings.Split(file, "/")
+		if len(parts) > 1 {
+			filename := parts[len(parts)-1]
+			dir := parts[len(parts)-2]
+			if (dir != "github.com/apimatic/go-core-runtime/assert" && dir != "mock" && dir != "require") || filename == "mock_test.go" {
+				callers = append(callers, fmt.Sprintf("%s:%d", file, line))
+			}
+		}
+
+		// Drop the package
+		segments := strings.Split(name, ".")
+		name = segments[len(segments)-1]
+		if isTest(name, "Test") ||
+			isTest(name, "Benchmark") ||
+			isTest(name, "Example") {
+			break
+		}
+	}
+
+	return callers
+}
+
+func isTest(name, prefix string) bool {
+	if !strings.HasPrefix(name, prefix) {
+		return false
+	}
+	if len(name) == len(prefix) { // "Test" is ok
+		return true
+	}
+	r, _ := utf8.DecodeRuneInString(name[len(prefix):])
+	return !unicode.IsLower(r)
+}
+
+type labeledContent struct {
+	label   string
+	content string
+}
+
+func labeledOutput(content ...labeledContent) string {
+	longestLabel := 0
+	for _, v := range content {
+		if len(v.label) > longestLabel {
+			longestLabel = len(v.label)
+		}
+	}
+	var output string
+	for _, v := range content {
+		output += "\t" + v.label + ":" + strings.Repeat(" ", longestLabel-len(v.label)) + "\t" + indentMessageLines(v.content, longestLabel) + "\n"
+	}
+	return output
+}
+
+func indentMessageLines(message string, longestLabelLen int) string {
+	outBuf := new(bytes.Buffer)
+
+	for i, scanner := 0, bufio.NewScanner(strings.NewReader(message)); scanner.Scan(); i++ {
+		// no need to align first line because it starts at the correct location (after the label)
+		if i != 0 {
+			// append alignLen+1 spaces to align with "{{longestLabel}}:" before adding tab
+			outBuf.WriteString("\n\t" + strings.Repeat(" ", longestLabelLen+1) + "\t")
+		}
+		outBuf.WriteString(scanner.Text())
+	}
+
+	return outBuf.String()
+}

go.mod

@@ -2,14 +2,12 @@ module github.com/apimatic/go-core-runtime
 
 go 1.18
 
+require github.com/go-openapi/jsonpointer v0.20.2
+
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/go-openapi/jsonpointer v0.20.2 // indirect
 	github.com/go-openapi/swag v0.22.5 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/objx v0.5.0 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,25 +1,19 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-openapi/jsonpointer v0.20.2 h1:mQc3nmndL8ZBzStEo3JYF8wzmeWffDH4VbXz58sAx6Q=
 github.com/go-openapi/jsonpointer v0.20.2/go.mod h1:bHen+N0u1KEO3YlmqOjTT9Adn1RfD91Ar825/PuiRVs=
 github.com/go-openapi/swag v0.22.5 h1:fVS63IE3M0lsuWRzuom3RLwUMVI2peDH01s6M70ugys=
 github.com/go-openapi/swag v0.22.5/go.mod h1:Gl91UqO+btAM0plGGxHqJcQZ1ZTy6jbmridBTsDy8A0=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

https/apiError_test.go

@@ -8,7 +8,7 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
+	"github.com/apimatic/go-core-runtime/assert"
 )
 
 const mockJSONResponseBody = `{