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|
package collection
import (
"fmt"
"math"
"path"
"path/filepath"
"testing"
)
func TestEnumerateDirectoryOptions_UniqueBits(t *testing.T) {
isPowerOfTwo := func(subject float64) bool {
a := math.Abs(math.Log2(subject))
b := math.Floor(a)
return a-b < .0000001
}
if !isPowerOfTwo(64) {
t.Log("isPowerOfTwo decided 64 is not a power of two.")
t.FailNow()
}
if isPowerOfTwo(91) {
t.Log("isPowerOfTwo decided 91 is a power of two.")
t.FailNow()
}
seen := make(map[DirectoryOptions]struct{})
declared := []DirectoryOptions{
DirectoryOptionsExcludeFiles,
DirectoryOptionsExcludeDirectories,
DirectoryOptionsRecursive,
}
for _, option := range declared {
if _, ok := seen[option]; ok {
t.Logf("Option: %d has already been declared.", option)
t.Fail()
}
seen[option] = struct{}{}
if !isPowerOfTwo(float64(option)) {
t.Logf("Option should have been a power of two, got %g instead.", float64(option))
t.Fail()
}
}
}
func ExampleDirectory_Enumerate() {
traverser := Directory{
Location: ".",
Options: DirectoryOptionsExcludeDirectories,
}
done := make(chan struct{})
filesOfInterest := traverser.Enumerate(done).Select(func(subject interface{}) (result interface{}) {
cast, ok := subject.(string)
if ok {
result = path.Base(cast)
} else {
result = subject
}
return
}).Where(func(subject interface{}) bool {
cast, ok := subject.(string)
if !ok {
return false
}
return cast == "filesystem_test.go"
})
for entry := range filesOfInterest {
fmt.Println(entry.(string))
}
close(done)
// Output: filesystem_test.go
}
func TestDirectory_Enumerate(t *testing.T) {
subject := Directory{
Location: filepath.Join(".", "testdata", "foo"),
}
testCases := []struct {
options DirectoryOptions
expected map[string]struct{}
}{
{
options: 0,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "a.txt"): struct{}{},
filepath.Join("testdata", "foo", "c.txt"): struct{}{},
filepath.Join("testdata", "foo", "bar"): struct{}{},
},
},
{
options: DirectoryOptionsExcludeFiles,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "bar"): struct{}{},
},
},
{
options: DirectoryOptionsExcludeDirectories,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "a.txt"): struct{}{},
filepath.Join("testdata", "foo", "c.txt"): struct{}{},
},
},
{
options: DirectoryOptionsRecursive,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "bar"): struct{}{},
filepath.Join("testdata", "foo", "bar", "b.txt"): struct{}{},
filepath.Join("testdata", "foo", "a.txt"): struct{}{},
filepath.Join("testdata", "foo", "c.txt"): struct{}{},
},
},
{
options: DirectoryOptionsExcludeFiles | DirectoryOptionsRecursive,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "bar"): struct{}{},
},
},
{
options: DirectoryOptionsRecursive | DirectoryOptionsExcludeDirectories,
expected: map[string]struct{}{
filepath.Join("testdata", "foo", "a.txt"): struct{}{},
filepath.Join("testdata", "foo", "bar", "b.txt"): struct{}{},
filepath.Join("testdata", "foo", "c.txt"): struct{}{},
},
},
{
options: DirectoryOptionsExcludeDirectories | DirectoryOptionsExcludeFiles,
expected: map[string]struct{}{},
},
{
options: DirectoryOptionsExcludeFiles | DirectoryOptionsRecursive | DirectoryOptionsExcludeDirectories,
expected: map[string]struct{}{},
},
}
for _, tc := range testCases {
subject.Options = tc.options
t.Run(fmt.Sprintf("%d", uint(tc.options)), func(t *testing.T) {
for entry := range subject.Enumerate(nil) {
cast := entry.(string)
if _, ok := tc.expected[cast]; !ok {
t.Logf("unexpected result: %q", cast)
t.Fail()
}
delete(tc.expected, cast)
}
if len(tc.expected) != 0 {
for unseenFile := range tc.expected {
t.Logf("missing file: %q", unseenFile)
}
t.Fail()
}
})
}
}
|
