remove dependency on model

pkg/integration/components/git.go

@@ -0,0 +1,28 @@
+package components
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Git struct {
+	*assertionHelper
+	shell *Shell
+}
+
+func (self *Git) CurrentBranchName(expectedName string) *Git {
+	return self.assert("git rev-parse --abbrev-ref HEAD", expectedName)
+}
+
+func (self *Git) assert(cmdStr string, expected string) *Git {
+	self.assertWithRetries(func() (bool, string) {
+		output, err := self.shell.runCommandWithOutput(cmdStr)
+		if err != nil {
+			return false, fmt.Sprintf("Unexpected error running command: `%s`. Error: %s", cmdStr, err.Error())
+		}
+		actual := strings.TrimSpace(output)
+		return actual == expected, fmt.Sprintf("Expected current branch name to be '%s', but got '%s'", expected, actual)
+	})
+
+	return self
+}