drivertest

Documentation

Overview

Package drivertest provides a conformance test for implementations of driver.

Index

• func Asset(name string) ([]byte, error)
• func AssetDir(name string) ([]string, error)
• func AssetNames() []string
• func RunConformanceTests(t *testing.T, newHarness HarnessMaker, asTests []AsTest)
• type AsTest
• type Harness
• type HarnessMaker

Functions

func Asset

func Asset(name string) ([]byte, error)

Asset loads and returns the asset for the given name. It returns an error if the asset could not be found or could not be loaded.

func AssetDir

func AssetDir(name string) ([]string, error)

AssetDir returns the file names below a certain directory embedded in the file by go-bindata. For example if you run go-bindata on data/... and data contains the following hierarchy:

data/
  foo.txt
  img/
    a.png
    b.png

then AssetDir("data") would return []string{"foo.txt", "img"} AssetDir("data/img") would return []string{"a.png", "b.png"} AssetDir("foo.txt") and AssetDir("notexist") would return an error AssetDir("") will return []string{"data"}.

func AssetNames

func AssetNames() []string

AssetNames returns the names of the assets.

func RunConformanceTests

func RunConformanceTests(t *testing.T, newHarness HarnessMaker, asTests []AsTest)

RunConformanceTests runs conformance tests for provider implementations of blob.

Types

type AsTest

type AsTest interface {
	// Name should return a descriptive name for the test.
	Name() string
	// BucketCheck will be called to allow verification of Bucket.As.
	BucketCheck(b *blob.Bucket) error
	// ErrorCheck will be called to allow verification of Bucket.ErrorAs.
	ErrorCheck(err error) error
	// BeforeWrite will be passed directly to WriterOptions as part of creating
	// a test blob.
	BeforeWrite(as func(interface{}) bool) error
	// BeforeList will be passed directly to ListOptions as part of listing the
	// test blob.
	BeforeList(as func(interface{}) bool) error
	// AttributesCheck will be called after fetching the test blob's attributes.
	// It should call attrs.As and verify the results.
	AttributesCheck(attrs *blob.Attributes) error
	// ReaderCheck will be called after creating a blob.Reader.
	// It should call r.As and verify the results.
	ReaderCheck(r *blob.Reader) error
	// ListObjectCheck will be called after calling List with the test object's
	// name as the Prefix. It should call o.As and verify the results.
	ListObjectCheck(o *blob.ListObject) error
}

AsTest represents a test of As functionality. The conformance test:

1. Calls BucketCheck.
2. Creates a blob using BeforeWrite as a WriterOption.
3. Fetches the blob's attributes and calls AttributeCheck.
4. Creates a Reader for the blob and calls ReaderCheck.
5. Calls List using BeforeList as a ListOption, and calls ListObjectCheck on the single list entry returned.
6. Tries to read a non-existent blob, and calls ErrorCheck with the error.

For example, an AsTest might set a provider-specific field to a custom value in BeforeWrite, and then verify the custom value was returned in AttributesCheck and/or ReaderCheck.

type Harness

type Harness interface {
	// MakeDriver creates a driver.Bucket to test.
	// Multiple calls to MakeDriver during a test run must refer to the
	// same storage bucket; i.e., a blob created using one driver.Bucket must
	// be readable by a subsequent driver.Bucket.
	MakeDriver(ctx context.Context) (driver.Bucket, error)
	// HTTPClient should return an unauthorized *http.Client, or nil.
	// Required if the provider supports SignedURL.
	HTTPClient() *http.Client
	// Close closes resources used by the harness.
	Close()
}

Harness descibes the functionality test harnesses must provide to run conformance tests.

type HarnessMaker

type HarnessMaker func(ctx context.Context, t *testing.T) (Harness, error)

HarnessMaker describes functions that construct a harness for running tests. It is called exactly once per test; Harness.Close() will be called when the test is complete.