Increased test coverage of httputils to 70 %

Signed-off-by: Kristina Zabunova <triara.xiii@gmail.com>
(cherry picked from commit d71817464e)

pkg/httputils/httputils_test.go

@@ -0,0 +1,59 @@
+package httputils
+
+import (
+	"testing"
+)
+
+func TestDownload(t *testing.T) {
+	_, err := Download("http://docker.com")
+
+	if err != nil {
+		t.Errorf("Expected error to not exist when Download(http://docker.com)")
+	}
+
+	// Expected status code = 404
+	_, err = Download("http://docker.com/abc1234567")
+	if err == nil {
+		t.Errorf("Expected error to exist when Download(http://docker.com/abc1234567)")
+	}
+}
+
+func TestNewHTTPRequestError(t *testing.T) {
+	errorMessage := "Some error message"
+	httpResponse, _ := Download("http://docker.com")
+	err := NewHTTPRequestError(errorMessage, httpResponse)
+
+	if err.Error() != errorMessage {
+		t.Errorf("Expected err to equal error Message")
+	}
+}
+
+func TestParseServerHeader(t *testing.T) {
+	serverHeader, err := ParseServerHeader("bad header")
+	if err.Error() != "Bad header: Failed regex match" {
+		t.Errorf("Should fail when header can not be parsed")
+	}
+
+	serverHeader, err = ParseServerHeader("(bad header)")
+	if err.Error() != "Bad header: '/' missing" {
+		t.Errorf("Should fail when header can not be parsed")
+	}
+
+	serverHeader, err = ParseServerHeader("(without/spaces)")
+	if err.Error() != "Bad header: Expected single space" {
+		t.Errorf("Should fail when header can not be parsed")
+	}
+
+	serverHeader, err = ParseServerHeader("(header/with space)")
+	if serverHeader.App != "(header" {
+		t.Errorf("Expected serverHeader.App to equal \"(header\"")
+	}
+
+	if serverHeader.Ver != "with" {
+		t.Errorf("Expected serverHeader.Ver to equal \"with\"")
+	}
+
+	if serverHeader.OS != "header/with space" {
+		t.Errorf("Expected serverHeader.OS to equal \"header/with space\"")
+	}
+}

pkg/httputils/mimetype_test.go

@@ -0,0 +1,14 @@
+package httputils
+
+import (
+	"testing"
+)
+
+func TestDetectContentType(t *testing.T) {
+	input := []byte("That is just a plain text")
+
+	contentType, _, err := DetectContentType(input)
+	if err != nil || contentType != "text/plain" {
+		t.Errorf("TestDetectContentType failed")
+	}
+}