actually add unit tests

pkg/drivers/kic/oci/types_test.go

@@ -0,0 +1,127 @@
+/*
+Copyright 2019 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package oci
+
+import (
+	"testing"
+)
+
+func TestParseMountString(t *testing.T) {
+	testCases := []struct {
+		Name          string
+		MountString   string
+		ExpectErr     bool
+		ExpectedMount Mount
+	}{
+		{
+			Name:        "basic linux",
+			MountString: "/foo:/bar",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				HostPath:      "/foo",
+				ContainerPath: "/bar",
+			},
+		},
+		{
+			Name:        "linux read only",
+			MountString: "/foo:/bar:ro",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				HostPath:      "/foo",
+				ContainerPath: "/bar",
+				Readonly:      true,
+			},
+		},
+		{
+			Name:        "windows style",
+			MountString: "C:\\Windows\\Path:/foo",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				HostPath:      "C:\\Windows\\Path",
+				ContainerPath: "/foo",
+			},
+		},
+		{
+			Name:        "windows style read/write",
+			MountString: "C:\\Windows\\Path:/foo:rw",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				HostPath:      "C:\\Windows\\Path",
+				ContainerPath: "/foo",
+				Readonly:      false,
+			},
+		},
+		{
+			Name:        "container only",
+			MountString: "/foo",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				ContainerPath: "/foo",
+			},
+		},
+		{
+			Name:        "selinux relabel & bidirectional propagation",
+			MountString: "/foo:/bar/baz:Z,rshared",
+			ExpectErr:   false,
+			ExpectedMount: Mount{
+				HostPath:       "/foo",
+				ContainerPath:  "/bar/baz",
+				SelinuxRelabel: true,
+				Propagation:    MountPropagationBidirectional,
+			},
+		},
+		{
+			Name:        "invalid mount option",
+			MountString: "/foo:/bar:Z,bat",
+			ExpectErr:   true,
+			ExpectedMount: Mount{
+				HostPath:       "/foo",
+				ContainerPath:  "/bar",
+				SelinuxRelabel: true,
+			},
+		},
+		{
+			Name:          "empty spec",
+			MountString:   "",
+			ExpectErr:     false,
+			ExpectedMount: Mount{},
+		},
+		{
+			Name:        "relative container path",
+			MountString: "/foo/bar:baz/bat:private",
+			ExpectErr:   true,
+			ExpectedMount: Mount{
+				HostPath:      "/foo/bar",
+				ContainerPath: "baz/bat",
+				Propagation:   MountPropagationNone,
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		mount, err := ParseMountString(tc.MountString)
+		if err != nil && !tc.ExpectErr {
+			t.Errorf("Unexpected error for \"%s\": %v", tc.Name, err)
+		}
+		if err == nil && tc.ExpectErr {
+			t.Errorf("Expected error for \"%s\" but didn't get any: %v %v", tc.Name, mount, err)
+		}
+		if mount != tc.ExpectedMount {
+			t.Errorf("Unexpected mount for \"%s\":\n expected %+v\ngot %+v", tc.Name, tc.ExpectedMount, mount)
+		}
+	}
+}